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STL - PHX

$59 Find cheap flights from St. Louis to Phoenix Sky Harbor Airport

This is the cheapest one-way flight price found by a KAYAK user in the last 72 hours by searching for a flight from St. Louis to Phoenix departing on 6/5. Fares are subject to change and may not be available on all flights or dates of travel. Click the price to replicate the search for this deal.
1 adult
0 bags
Sat 6/22
Sat 6/29

Search hundreds of travel sites at once for deals on flights to Phoenix Sky Harbor Airport

 
These are the airlines KAYAK users have selected most often from within our search results in flight searches from St. Louis to Phoenix, as well as popular online travel agencies
These are the airlines KAYAK users have selected most often from within our search results in flight searches from St. Louis to Phoenix, as well as popular online travel agencies
In the last 7 days travelers have searched 43,800,826 times on KAYAK, and here is why:

Save 21% or moreCompare multiple travel sites with one search.

Track pricesNot ready to book? Create a price alert for when prices drop.

Filter your dealsChoose cabin class, free Wi-Fi and more.

Bundle and saveSave money when you bundle your flight + hotel.

Cheap flight deals from St. Louis to Phoenix (STL-PHX)

Here are some of the best deals found on KAYAK recently from the most popular airlines for round-trip flights from St. Louis to Phoenix that are departing in the next months. While these flights were available on KAYAK in the last 72 hours, prices and availability are subject to change and deals may expire.
Discover the best prices and deals for you by selecting your travel dates.
Choose your dates
9:00 pm - 10:17 pmSTL-PHX
3h 17mnonstop
5:08 pm - 10:07 pmPHX-STL
2h 59mnonstop
$118Frontier
Find Deal
Sat, Jun 22 - Wed, Jun 26
9:55 pm - 11:04 pmSTL-PHX
3h 09mnonstop
4:01 pm - 9:02 pmPHX-STL
3h 01mnonstop
$121Frontier
Find Deal
Sat, Jul 6 - Sat, Jul 13
8:00 am - 9:24 amSTL-PHX
3h 24mnonstop
6:56 pm - 11:50 pmPHX-STL
2h 54mnonstop
$131American Airlines
Find Deal
Tue, Jun 4 - Tue, Jun 11
1:55 pm - 11:00 amSTL-PHX
23h 05m1 stop
10:16 am - 1:05 pmPHX-STL
24h 49m1 stop
$154Spirit Airlines
Find Deal
Wed, Jun 12 - Tue, Jun 18
6:11 pm - 7:28 pmSTL-PHX
3h 17mnonstop
12:24 pm - 5:21 pmPHX-STL
2h 57mnonstop
$156American Airlines
Find Deal
Fri, Jun 21 - Tue, Jun 25
10:11 am - 11:07 pmSTL-PHX
14h 56m1 stop
9:14 pm - 3:06 pmPHX-STL
15h 52m1 stop
$195Spirit Airlines
Find Deal
Tue, Jul 16 - Tue, Jul 30
7:55 am - 12:18 pmSTL-PHX
6h 23m1 stop
5:37 pm - 12:58 amPHX-STL
5h 21m1 stop
$216Delta
Find Deal
Thu, Jun 6 - Tue, Jun 11
6:25 pm - 11:34 pmSTL-PHX
7h 09m1 stop
6:00 am - 2:33 pmPHX-STL
6h 33m1 stop
$253Delta
Find Deal
Mon, Jun 10 - Sat, Jun 15
4:36 pm - 8:30 pmSTL-PHX
5h 54m1 stop
6:00 am - 4:22 pmPHX-STL
8h 22m2 stops
$351United Airlines
Find Deal
Fri, Aug 16 - Sun, Aug 25
4:36 pm - 8:30 pmSTL-PHX
5h 54m1 stop
7:00 am - 4:28 pmPHX-STL
7h 28m1 stop
$366United Airlines
Find Deal
Sat, Jun 29 - Mon, Jul 1

Flights from St. Louis to Phoenix - Travel Insights & Trends

Get data-powered insights and trends into flights from St. Louis to Phoenix to help you find the cheapest flights, the best time to fly and much more.

What’s the cheapest day of the week to fly from St. Louis to Phoenix Sky Harbor Airport?

The average price of all flights from St. Louis to Phoenix Sky Harbor Intl Airport clicked on KAYAK for each day over the last 12 months.
For St. Louis to Phoenix Sky Harbor Airport, Tuesday is the cheapest day to fly on average and Thursday is the most expensive. Flying from Phoenix Sky Harbor Airport back to St. Louis, the best deals are generally found on Tuesday, with Sunday being the most expensive.

What is the cheapest month to fly from St. Louis to Phoenix Sky Harbor Intl Airport?

To calculate monthly average prices, KAYAK takes all prices for each month over the last year for flights from St. Louis to Phoenix Sky Harbor Intl Airport, removes the top 0.1% to account for outliers, and then takes the median of all values for each month.
The cheapest month for flights from St. Louis to Phoenix Sky Harbor Intl Airport is May, where tickets cost $230 on average. On the other hand, the most expensive months are March and December, where the average cost of tickets is $418 and $400 respectively.

How far in advance should I book a flight from St. Louis to Phoenix Sky Harbor Intl Airport?

To calculate daily average prices, KAYAK takes all prices for each day before departure over the last year for flights from St. Louis to Phoenix Sky Harbor Intl Airport, removes the top 0.1% to account for outliers, and then takes the average of all the values for each month.
To get a below average price on the flight from St. Louis to Phoenix Sky Harbor Intl Airport, you should book around 3 days before departure. For the absolute cheapest price, our data suggests you should book 83 days before departure.

Which airlines provide the cheapest flights from St. Louis to Phoenix Sky Harbor Airport?

The cheapest price for the route for each airline clicked by KAYAK users in the last 72 hours.
The best deals for a one-way ticket found by KAYAK users over the last 3 days were on Frontier ($59) and Spirit Airlines ($64). The cheapest round-trip tickets were found on Frontier ($118) and American Airlines ($131).

Which airlines fly most frequently between St. Louis and Phoenix Sky Harbor Airport?

Southwest connects St. Louis to Phoenix Sky Harbor Airport up to 7 flights per day, followed by American Airlines (3 flights per day), and Frontier (one flight per day).

Which airlines fly non-stop between St. Louis and Phoenix Sky Harbor Intl Airport?

Airline and price data is aggregated from results in KAYAK’s search results from the last 2 weeks for flights from St. Louis to Phoenix Sky Harbor Intl Airport.
There are 3 airlines that fly nonstop from St. Louis to Phoenix Sky Harbor Intl Airport. They are: American Airlines, Frontier and Southwest. The cheapest price of all airlines flying this route was found with Frontier at $78 for a one-way flight. On average, the best prices for this route can be found at Frontier.

How many flights are there between St. Louis and Phoenix Sky Harbor Intl Airport per day?

Each day, there are between 9 and 13 nonstop flights that take off from St. Louis and land in Phoenix Sky Harbor Intl Airport, with an average flight time of 3h 15m. The most common departure time is 10:00 pm and most flights take off in the morning. Each week, there are 78 flights. The most frequent day of departure is Monday, when 17% of all weekly flights depart. The fewest flights depart on a Tuesday.

Which cabin class options are there for flights between St. Louis and Phoenix Sky Harbor Intl Airport?

The average price of flights for each cabin class for the route found by users searching on KAYAK over the last 2 weeks.
There are 3 cabin class options for the route. These are First, Business and Economy. Perform a search on KAYAK to find the latest prices and availability for all cabin fares, which differ across airlines.

How long does a flight from St. Louis to Phoenix Sky Harbor Airport take?

Direct flights cover the 1,258 miles separating St. Louis to Phoenix Sky Harbor Airport in about 3h 09m.

What’s the earliest departure time from St. Louis to Phoenix Sky Harbor Airport?

Early birds can take the earliest flight from St. Louis at 5:15 am and will be landing in Phoenix Sky Harbor Intl Airport at 6:30 am.

What’s the latest departure time from St. Louis to Phoenix Sky Harbor Airport?

If you prefer to fly at night, the latest flight from St. Louis to Phoenix Sky Harbor Intl Airport jets off at 10:59 pm and lands at 12:16 am.

Good to know

Low season

September

High season

March

Cheapest flight

$59
Best time to beat the crowds with an average 0% drop in price.
Most popular time to fly with an average 17% increase in price.
Flight from St. Louis to Phoenix Sky Harbor Airport

When to book flights from St. Louis to Phoenix

Are your dates flexible? Find out the best times to travel from St. Louis to Phoenix based on our flight data from the last year. Discover the cheapest month and even day to fly.
Estimated round-trip price
KAYAK looks at all historical flight data for each date to provide a predicted price for one-way trips or round-trips with a duration up to 40 days. While we try to provide actual minimum prices for each date, some prices are predictions and actual prices may differ.

FAQs for booking St. Louis to Phoenix Sky Harbor Airport flights

  • Can I withdraw money at STL?

    If you’d like to withdraw some cash at STL, you’ll be able to do so with ease, given that this airport is full of operational ATMs. The ATMs are located near Gate A10 in Concourse A, the Mid-Level Stage of Terminal 1, Gate C15 in Concourse C, Gate E20 in Terminal 2, and the entrance doors of Terminal 2.

  • What is the most convenient way to travel from St. Louis to STL?

    The most convenient way to travel from St. Louis to STL is by taxi. This is because, aboard one of the taxis present in St. Louis, you’ll be able to travel comfortably with all your luggage from your preferred pickup point to the entrance of STL’s terminals.

  • Does PHX have a medical center?

    If you feel a bit unwell while on your flight from STL to PHX, before departing PHX, you can receive a quick medical check-up at XpresCheck. Located on Level 3 of Terminal 4, this clinic boasts well-trained professionals.

  • Does PHX have a chapel?

    In case you’d like to pray, meditate, or gather your thoughts before departing PHX, you’ll be able to do so, given that PHX has a chapel on Level 3 of Terminal 4. It’s worth mentioning that you can pray at this chapel, regardless of your faith, as it is an interfaith chapel.

  • What is the cheapest flight from St. Louis to Phoenix Sky Harbor Intl Airport?

    In the last 3 days, the lowest price for a flight from St. Louis to Phoenix Sky Harbor Intl Airport was $59 for a one-way ticket and $118 for a round-trip.

  • Do I need a passport to fly between St. Louis and Phoenix Sky Harbor Airport?

    No

  • Which airports will I be using when flying from St. Louis to Phoenix Sky Harbor Airport?

    When flying out of St. Louis you will be using Lambert-St Louis. You will be landing at Phoenix Sky Harbor Airport, also known as Phoenix Sky Harbor Intl.

  • Which airlines offer Wi-Fi service onboard planes from St. Louis to Phoenix Sky Harbor Airport?

    American Airlines, Alaska Airlines, and Delta offer inflight Wi-Fi service on the St. Louis to Phoenix Sky Harbor Airport flight route.

  • Which aircraft models fly most regularly from St. Louis to Phoenix Sky Harbor Airport?

    The Boeing 737-800 is the aircraft model that flies most regularly on the St. Louis to Phoenix Sky Harbor Airport flight route.

  • Which airline alliances offer flights from St. Louis to Phoenix Sky Harbor Airport?

    oneworld is the only airline alliance operating flights between St. Louis and Phoenix Sky Harbor Airport.

  • On which days can I fly direct from St. Louis to Phoenix Sky Harbor Airport?

    There are nonstop flights from St. Louis to Phoenix Sky Harbor Airport on a daily basis.

  • Which is the best airline for flights from St. Louis to Phoenix, Delta or United Airlines?

    The two airlines most popular with KAYAK users for flights from St. Louis to Phoenix are Delta and United Airlines. With an average price for the route of $406 and an overall rating of 8.0, Delta is the most popular choice. United Airlines is also a great choice for the route, with an average price of $511 and an overall rating of 7.4.

  • How does KAYAK find such low prices on flights from St. Louis to Phoenix Sky Harbor Airport?

    KAYAK is a travel search engine. That means we look across the web to find the best prices we can find for our users. With over 2 billion flight queries processed yearly, we are able to display a variety of prices and options on flights from St. Louis to Phoenix Sky Harbor Airport.

  • How does KAYAK's flight Price Forecast tool help me choose the right time to buy my flight ticket from St. Louis to Phoenix Sky Harbor Airport?

    KAYAK’s flight Price Forecast tool uses historical data to determine whether the price for a flight to Phoenix Sky Harbor Airport from St. Louis is likely to change within 7 days, so travelers know whether to wait or book now.

  • What is the Hacker Fare option on flights from St. Louis to Phoenix Sky Harbor Airport?

    Hacker Fares allow you to combine one-way tickets in order to save you money over a traditional round-trip ticket. You could then fly to Phoenix Sky Harbor Airport with an airline and back to St. Louis with another airline. Booking your flights between St. Louis and PHX can sometimes prove cheaper using this method.

  • What is KAYAK's "flexible dates" feature and why should I care when looking for a flight from St. Louis to Phoenix Sky Harbor Airport?

    Sometimes travel dates aren't set in stone. If your preferred travel dates have some wiggle room, flexible dates will show you all the options when flying to Phoenix Sky Harbor Airport from St. Louis up to 3 days before/after your preferred dates. You can then pick the flights that suit you best.

See more FAQs

KAYAK’s top tips for finding a cheap flight from St. Louis to Phoenix Sky Harbor Intl Airport

  • Looking for a cheap flight? 25% of our users found flights on this route for $89 or less one-way and $204 or less round-trip.
  • St. Louis Lambert International Airport (STL) usually has security checkpoints characterized by lengthy lines. Time and again, passengers have missed their flights at this airport after being unable to go through its security checkpoints in time for their flights. To avoid such a fate, on the date you’re scheduled to fly to Phoenix, it’s in your best interest to reach this airport at least 2h before your flight.
  • If you require special in-flight services on your flight from STL to Phoenix Sky Harbor International Airport (PHX), you should contact and inform the airline you intend to travel with of the special assistance services you’ll require. It’s advisable that you do so when booking your flight or at least 72h before your flight.
  • STL features several on-site parking garages. This airport is also surrounded by a number of off-site garages. If you’d like to leave your car in a parking garage you can easily get to from the airport upon your return from your trip, you should leave it in an off-site garage, as off-site garages charge cheaper rates than the on-site garages.
  • If you travel to PHX with your pet, you can take advantage of the numerous designated pet relief areas at the airport. Some of these pet relief areas are outdoors, while others are indoors. The outdoor ones are located west of Terminal 3, outside the baggage claim area of Terminal 4, and at the northwest corner of the 44th Street PHX Sky Train station.
  • At PHX, you can easily rent a car, as the airport features a Rental Car Facility that houses branches for dependable car rentals like Alamo, Avis, Budget, Dollar, Enterprise, National, Payless, SIXT, and Thrifty. To get to this rental car facility, situated south of the airport’s complex, you will board an airport shuttle.
See more tips

Prefer to fly non-stop from St. Louis to Phoenix Sky Harbor Airport?

Find which airlines fly direct from Lambert-St Louis to Sky Harbor Intl, which days they fly and book direct flights.

Nonstop departures

Lambert-St Louis to Phoenix Sky Harbor Intl

Monday

Alaska Airlines, American Airlines, Frontier, +1 more

Alaska Airlines, American Airlines, +2 more

Tuesday

Alaska Airlines, American Airlines, Southwest

Alaska Airlines, American Airlines, +1 more

Wednesday

Alaska Airlines, American Airlines, Frontier, +1 more

Alaska Airlines, American Airlines, +2 more

Thursday

Alaska Airlines, American Airlines, Southwest

Alaska Airlines, American Airlines, +1 more

Friday

Alaska Airlines, American Airlines, Frontier, +1 more

Alaska Airlines, American Airlines, +2 more

Saturday

Alaska Airlines, American Airlines, Frontier, +1 more

Alaska Airlines, American Airlines, +2 more

Sunday

Alaska Airlines, American Airlines, Southwest

Alaska Airlines, American Airlines, +1 more

See more direct flights

Nonstop returns

Phoenix Sky Harbor Intl to Lambert-St Louis

Monday

Alaska Airlines, American Airlines, Frontier, +1 more

Alaska Airlines, American Airlines, +2 more

Tuesday

Alaska Airlines, American Airlines, Southwest

Alaska Airlines, American Airlines, +1 more

Wednesday

Alaska Airlines, American Airlines, Frontier, +1 more

Alaska Airlines, American Airlines, +2 more

Thursday

Alaska Airlines, American Airlines, Southwest

Alaska Airlines, American Airlines, +1 more

Friday

Alaska Airlines, American Airlines, Frontier, +1 more

Alaska Airlines, American Airlines, +2 more

Saturday

Alaska Airlines, American Airlines, Frontier, +1 more

Alaska Airlines, American Airlines, +2 more

Sunday

Alaska Airlines, American Airlines, Southwest

Alaska Airlines, American Airlines, +1 more

See more direct flights
See more direct flights

Top 5 airlines serving from St. Louis to Phoenix

 
See real verified KAYAK customer reviews for airlines flying from St. Louis to Phoenix. Airline scores are aggregated from all reviews left by passengers on KAYAK after flying with an airline. KAYAK doesn’t show reviews that are older than 5 years. Learn how KAYAK collects reviews.
Need help choosing which airline to fly with from St. Louis to Phoenix? KAYAK airline reviews give an overall score for each airline based on loads of factors, including comfort, boarding, in-flight entertainment and more, to make your decision easier. See airline scores according to verified KAYAK customer reviews.
8.0
DeltaOverall score based on 10561 reviews
8.6Crew
8.2Boarding
7.9Comfort
8.0Entertainment
7.4Food
Airline reviews

Paid premium for Delta only to be on safe but tired old 767 with ancient cabin in mediocre condition. Poor wifi and horrible inflight entertainment. Hardly a premium experience. Should have flown SW and had fun flight crew and no pretense

6.0 GoodPeter, May 2024SLC - HNL
Read more about Delta reviews

Paid premium for Delta only to be on safe but tired old 767 with ancient cabin in mediocre condition. Poor wifi and horrible inflight entertainment. Hardly a premium experience. Should have flown SW and had fun flight crew and no pretense

Our flight to Zurich was delayed by almost 3 hours, so we missed our next flight. There was no indication it would be delayed this much. We were told the gate had changed and then it apparently took over 2 hours to load the "catering" on the plane. We were not compensated in any way for the trouble.

Rated entertainment as Mediocre as there were major problems with the Infotainment system that took probably a half hour for them to fix.

Your crew could maybe answer the call bell at least one of the times I pressed it. I pressed it first time with 2.5 hours left in our flight bc my partner was hungry and wanted a sandwich. We finally got the sandwich with 40 mins left in the flight.

Delta crushed it. Flight attendant in first was attentive and just never stopped. Honestly one of the best domestic flights I’ve been on.

They were an hour late and they didn’t have my wheelchair for me

The Flight crew didn’t serve us until about 1.5 hours into the flight because of turbulence but after it ended it was fine to move around. They served us water only and snacks and then NEVER, NOT ONE TIME came through to collect trash until right before landing about 1.5 hours later. There was absolutely no need for that. They crew was just standing around talking and visiting with each other and really never tried to see if we might want something besides water or even try to come pick up trash. This is VERY unusual for a Delta flight but it was not what I would have expected for a 4 hour flight.

The 1st class male crew member was very pleasant - the short female with round glasses , maybe in 50’s had no personality- never spoke when delivering my food, drink, & never smiled the whole trip! In fact looked annoyed when the boarding proses was happening- I would never hire this woman - unfriendly . Have never dealt with a crew member like her-

5-hour delay due to storms in Tanoa and airspace restricted by Miami traffic controllers.

A regional sized plane was used for a cross country flight with no overhead bin space. I had to "pink check" my laptop and my medications. I was NOT pleased!!!!

Fantastic. Smooth boarding with an infant. Never experienced it with any other carriers.

This was a Lufthansa flight, not United. The CSA at the counter, Ashley, was not only incompetent, but quite rude. Me and two other PAX waited over 7 minutes standing in front of her and another CSA and they ignored us. We joked that we must have accidently taken invisibility pills. She could have at least said "I'll be with you in a moment, I'm currently....". I could go on about how rude she and the other CSAs were (whispering, not communicating with me, blaming the situation on others, etc.). She would not work for me. Then, she gave me literally the worst seat on the plane. the worst. My seat kept getting bumped (rammed twice by the crew with their carts and about every 5 minutes by someone using the bathroom), listening to the bathroom all night, crowded seat, etc.

My seat was broken. WiFi didn’t work. Gate crew at HOU were rude and condescending. Treated all the passengers badly. Bad experience, United.

First flight of the day… MINIMUM FUEL! 15 minute landing delay at HOU due to fog turned into a 2+ hour delay! Rather than circle, they had to divert to another city to refuel! Sat on tarmac at Austin to refuel. We ALL missed our connections! The crew, including pilots, were clueless. Crew was really a mess. At HOU, Untied employees were exceedingly rude to all. It was pitiful.

An hour and a half late is UNACCEPTABLE. The negative impact to our family is unconscionable. And for the price we were forced to pay...

No lounge access with “United First” ticket. False alarm about late flight, jeopardizing connection. Wrong meal. Loose power socket would not hold plug, could not charge device. In-flight access to text messaging did not work. Toilet seat on plane would not stay up.

We ended up with seats in the very back. So they did not recline. Have no idea why, we reserved and checked in very early. The isles were very narrow and the seats had very little leg room. But they did give us water, and a snack.

Check in etc was very good. As for on the plane, it was like flying in a freezer. It was so cold, i have flown for years and never been so cold on a plane. Staff on board said its always cold when flying which is a load of rubbish. They wouldnt put any heating on and now i have the flu because of this .

I’ve had a couple flights this week on United that were delayed by an hour or more

Surprisingly easy! I was hesitant to try this, but the cost swayed me. I actually felt like I had less stress than all the taxiing and possible delays that occur with short regional flights where you spend less time in the air than getting to and from the plane..

Flight attendant was incredible. Very efficient, friendly and pleasant. Patricia was one of the best I have ever seen. Please give her a big raise!

All four American Airlines flights I took in last seven days were delayed. Caused me loads of problems, missed meetings, loss of time and money.

American Airlines continues to price it can provide the least comfortable passenger experience in the air. This legacy carrier rivals the budgets for both terrible seats and inadequate amenities. I am a 5’7” woman who is not wider than a coach seat (even on these narrow bodied aircraft). My 3.5 hour flight was terribly uncomfortable because the leg room is inadequate (my knees hit the seat on front of me even when it was not reclined); the seat barely reclines; and the foam padding is worn thin to the extent one can feel the metal supports of the seat. Add to this the fact that the aisle is super narrow, so that the drink cart literally scrapes the arm rest of the aisle seat. It’s basically torture.

Plane took off without me, my stepdad and a dozen other passengers. It went from an hour delay to boarding in 15 montures without notifying anyone. Names were not called overhead. Now I’m missing a day of work and stuck in Charolette overnight paying for a hotel and Ubers out of pocket

Flight from SBP to DFW 1. They rerouted us through PHX 2. Delayed flight out of SBP for 3 hrs so we missed our connection Downgrade on rerouted flight. Back of the plane, center seats, didn't sit together 4. Return flight out of DFW same exact thing. Delayed, missed connection, Downgrade + they lost our luggage! A complete mess.

after boarding on phx to sjd, crew discovered that one of the megaphones was either out of date or not working. It took 90 minutes to get a replacement and do the "paperwork." That is really unacceptable. Why wasn't the megaphone problem discovered before boarding? Is it part of normal maintenance check? who is responsible for checking. How can paperwork take that long? Fortunately, SJD was final destination for most travelers so very few if any passengers had to miss connections.

Flight From PHX to CVG was on time, very professional staff

Excellent- plan was barely populated. I cannot remember a flight where I was able/encouraged to stretch out!

Flight attendants used to be nice to people. And any flight over 5 hours should have some kind of food other than tiny pretzels and one drink comped.

just overall disappointing, not a treat to travel these days....paying for Main Cabin Extra was not worth it.

I got a one-way, last-minute nonstop flight from PDX to BWI for only $125. Yes, I got nicked $79 more for a checked suitcase and $89 more for the BIG SEAT option, but it was worth it, even with $4.50 for coffee and $10 for a snack (the latter no different than any other airline). The grand total was still less flying on any other airline.

It was the worst ever, i will be filing a lawsuit to get a refund. Our flight was delayed 4 hours so we would miss our connecting flight, we were not rebooked to our destination the same day, we were not offered any options to get home on the same day despite being clear that we absolutely cannot get stranded at night due to family, we were forced to book our own flights on a different airline to get home, and spririt is refusing a refund because our flight wasn't cancelled, only delayed. oh yeah, and they lost our luggage on the first part of the trip and you cannot get a hold of customer service when anything goes wrong, on hold for 30+ minutes. and their app breaks so you can't use that either.

This recognisable no-frills airline gets me from point-A to point-B. I was able to get to Chicago without stress. The checked baggage collection and reclaim could be improved.

The crew was the best and very accommodating I know you don't offer any complimentary items but water and coffee will not break the bank !!

My flight was cancelled!!! I had to spend 200.00 on another flight!!

The whole day was a nightmare. Flight extremely late. Boarding was a mess of a nightmare.

When we landed, they kept us on the plane for almost 25 minutes. Could do better.

worst trip ever Spirit lost our Baggs which were never put on the plane in Atlanta. 24 hours ago they are telling me now that the bags are still missing.

Never been on this flight as i had missed it due to delayed connecting flight

Horrible. Delays, no customer support and fake promises and everything. i am suffering to help as due to connecting flight getting missed no support on ground and customer support window is closed and we are sitting o ground without anything

The Frontier app wasn’t working. So I could not pay for a carry on the week prior to flying. They charged me 99$ at the gate to carry on a duffle bag.

Good for the price. My only complaint is that the pilot should keep the air flowing while passengers are waiting to getting out of airplane.

Plane could have been more on time. More leg room .

I arrived 1 hour prior to boarding, and they said I was too late for a domestic flight. First time I heard that :-(

Check in online was easy. Seats aren’t very comfortable

Fecal matter in seat back pocket. Presumably from a kids diaper.

Worst airline to travel with. They treat you like a prisoner in a jailhouse barking out orders and threats. Nickle and dime you to the same price or higher than a respectable airline like one of the big 3 . Might as well fly with standard airlines

Well I mean u get what u pay for so 🤷‍♂️

Over an hour delay in departure but I was notified beforehand. Another delay on tarmac upon arrival at LGA. We ended up departing the plane almost 2 hours later than expected

I fly Frontier because it’s affordable. I understand that the seats are tight and not the most comfortable…but that’s part of it. The problem with this flight was that there was a group of travelers directly behind me at the back of the plane who were ridiculously loud and obnoxious the entire flight. I’m pretty sure they were drunk and I could periodically smell an odd odor that I believe was one of them using a smokeless vape pen. The stewards had to remind them to keep quiet during the pre-flight instruction, but that was it. They never said another thing to them for the rest of the flight. It was a miserable.

Book cheap flights from St. Louis to Phoenix

Recent one-way flight deals

 
Only flying one-way? Below are some of the best one-way flight deals from St. Louis to Phoenix found on KAYAK in the last 72 hours.
6/5Wed
nonstopFrontier
3h 18mSTL-PHX
$59
7/31Wed
1 stopSpirit Airlines
6h 22mSTL-PHX
$64
10/3Thu
nonstopAmerican Airlines
3h 17mSTL-PHX
$66
6/20Thu
1 stopDelta
7h 53mSTL-PHX
$108
5/28Tue
nonstopAmerican Airlines
3h 21mSTL-PHX
$136
5/28Tue
1 stopDelta
7h 36mSTL-PHX
$145
6/23Sun
2 stops
18h 34mSTL-PHX
$159
6/3Mon
3 stops
26h 39mSTL-PHX
$168
7/31Wed
2 stopsUnited Airlines
13h 40mSTL-PHX
$281
10/3Thu
2 stopsUnited Airlines
11h 18mSTL-PHX
$292

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Last minute flights from St. Louis to Phoenix

Last minute flight, train and bus deals

 
These last-minute flight deals are the cheapest flights found on KAYAK in the last 72 hours for flights from St. Louis to Phoenix that are departing in the next 10 days.
5/25Sat
nonstopFrontier
3h 17mSTL-PHX
5/29Wed
nonstopFrontier
2h 59mPHX-STL
$195
5/25Sat
multi-stopAmerican Airlines
5h 54mSTL-PHX
5/28Tue
nonstopAmerican Airlines
3h 00mPHX-STL
$236
5/25Sat
multi-stopDelta
6h 38mSTL-PHX
5/29Wed
multi-stopDelta
5h 47mPHX-STL
$253
5/25Sat
nonstopAmerican Airlines
3h 19mSTL-PHX
5/28Tue
nonstopAmerican Airlines
3h 00mPHX-STL
$271
5/24Fri
nonstopAmerican Airlines
3h 24mSTL-PHX
5/28Tue
nonstopAmerican Airlines
3h 00mPHX-STL
$296
5/24Fri
nonstopFrontier
3h 17mSTL-PHX
5/28Tue
multi-stopFrontier
12h 06mPHX-STL
$298
5/28Tue
multi-stopSpirit Airlines
25h 58mSTL-PHX
6/2Sun
multi-stopSpirit Airlines
8h 49mPHX-STL
$475
5/25Sat
multi-stopSpirit Airlines
23h 58mSTL-PHX
5/28Tue
multi-stopSpirit Airlines
23h 47mPHX-STL
$608
5/24Fri
multi-stopUnited Airlines
6h 04mSTL-PHX
5/26Sun
multi-stopUnited Airlines
13h 46mPHX-STL
$815
5/25Sat
multi-stopUnited Airlines
6h 25mSTL-PHX
5/28Tue
multi-stopUnited Airlines
7h 41mPHX-STL
$819

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St. Louis - Phoenix Sky Harbor Airport Flights

Departure:

St. Louis (STL)United States

Destination:

Phoenix Sky Harbor Airport (PHX)United States

Return flight deals:

Phoenix Sky Harbor Airport - St. Louis

Cabin classes:

$1,282
$3,299
$1,272
$87