SAN - STL

$109 Find Cheap Flights from San Diego to St. Louis

This is the cheapest one-way flight price found by a KAYAK user in the last 72 hours by searching for a flight from San Diego to St. Louis departing on 5/16. 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.
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KAYAK searches hundreds of travel sites at once for deals on flights to St. Louis

 
These are the airlines KAYAK users have selected most often from within our search results in flight searches from San Diego to St. Louis, 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 San Diego to St. Louis, as well as popular online travel agencies
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Cheap Flight Deals from San Diego to St. Louis (SAN-STL)

 
Here are some of the best deals found on KAYAK recently from the most popular airlines for round-trip flights from San Diego to St. Louis 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.

Recent round-trip flight deals from San Diego to St. Louis

KAYAK's recommended round-trip deals from the most popular airlines that fly from San Diego to St. Louis.
Discover the best prices for you by selecting your travel dates on KAYAK.
Choose your dates
Frontier Logo
6:25 am - 3:07 pmSAN-STL
6h 42m1 stop
Frontier Logo
9:55 pm - 11:58 pmSTL-SAN
28h 03m1 stop
$240Frontier
Find Deal
Thu, May 1 - Sun, May 4
Frontier Logo
10:38 am - 9:59 amSAN-STL
21h 21m1 stop
Frontier Logo
9:55 pm - 11:58 pmSTL-SAN
28h 03m1 stop
$241Frontier
Find Deal
Fri, May 2 - Thu, May 8
American Airlines Logo
10:33 pm - 9:37 amSAN-STL
9h 04m1 stop
American Airlines Logo
7:35 am - 12:43 pmSTL-SAN
7h 08m1 stop
$257American Airlines
Find Deal
Wed, Apr 23 - Fri, Apr 25
American Airlines Logo
9:45 pm - 8:30 amSAN-STL
8h 45m1 stop
American Airlines Logo
5:45 am - 12:43 pmSTL-SAN
8h 58m1 stop
$262American Airlines
Find Deal
Mon, Apr 21 - Fri, Apr 25
United Airlines Logo
6:15 am - 4:52 pmSAN-STL
8h 37m1 stop
United Airlines Logo
8:40 am - 1:50 pmSTL-SAN
7h 10m1 stop
$277United Airlines
Find Deal
Mon, Apr 14 - Thu, Apr 17
United Airlines Logo
10:16 am - 9:50 pmSAN-STL
9h 34m2 stops
United Airlines Logo
6:15 am - 11:07 amSTL-SAN
6h 52m1 stop
$282United Airlines
Find Deal
Mon, Apr 14 - Thu, Apr 17
Delta Logo
10:30 pm - 9:47 amSAN-STL
9h 17m1 stop
Delta Logo
6:00 am - 1:10 pmSTL-SAN
9h 10m1 stop
$297Delta
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Fri, May 2 - Sun, May 4
Southwest Logo
6:35 am - 12:10 pmSAN-STL
3h 35mnonstop
Southwest Logo
5:25 am - 11:35 amSTL-SAN
8h 10m1 stop
$315Southwest
Find Deal
Sat, May 3 - Sat, May 10
Southwest Logo
8:50 am - 6:40 pmSAN-STL
7h 50m2 stops
Southwest Logo
6:05 pm - 11:10 pmSTL-SAN
7h 05m1 stop
$318Southwest
Find Deal
Wed, Jul 23 - Sat, Jul 26
Delta Logo
9:40 pm - 9:03 amSAN-STL
9h 23m1 stop
Delta Logo
6:30 am - 10:38 amSTL-SAN
6h 08m1 stop
$379Delta
Find Deal
Fri, Jul 18 - Sun, Jul 20

KAYAK's insights & trends for San Diego to St. Louis flights

Get data-powered insights and trends into flights from San Diego to St. Louis 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 San Diego to St. Louis?

The average price of all round-trip flights from San Diego to St. Louis clicked on KAYAK for each day over the last 12 months.
If your flying dates are flexible, you should consider flying to St. Louis on a Wednesday, as we generally find the cheapest rates on that day for this route. On the other hand, Sunday is the most expensive day to fly from San Diego to St. Louis. For your return ticket, we recommend flying on a Tuesday and avoiding Saturdays for the best deals.

What is the cheapest month to fly from San Diego to St. Louis?

To calculate monthly average prices, KAYAK takes all prices for each month over the last year for round-trip flights from San Diego to St. Louis, 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 San Diego to St. Louis is August, where tickets cost $261 (return) on average. On the other hand, the most expensive months are December and March, where the average cost of round-trip tickets is $446 and $392 respectively.

How far in advance should I book a flight from San Diego to St. Louis?

To calculate weekly average prices, KAYAK takes all prices for each week before departure over the last year for round-trip flights from San Diego to St. Louis, removes the top 0.1% to account for outliers, and then takes the average of all the values for each week.
To get a below average price on the flight from San Diego to St. Louis, you should book around 3 weeks before departure. For the absolute cheapest price, our data suggests you should book 25 weeks before departure.

Good to know

Low season

January

High season

May

Cheapest flight

$109
Best time to beat the crowds with an average 1% drop in price.
Most popular time to fly and prices are also 8% lower on average.
Flight from San Diego to St. Louis

When to book flights from San Diego to St. Louis

Are your dates flexible? Find out the best times to travel from San Diego to St. Louis 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 flights from San Diego to St. Louis

  • What type of flights are offered from SAN to STL?

    The are 1-stop and 2-stop layover flights from SAN to STL often operated by Delta, Frontier, and American Airlines. The common layover cities include Las Vegas, Salt Lake City, Dallas, Chicago, and Atlanta. Direct flights are seldom offered from SAN to STL but you can get a few operated by Southwest Airlines.

  • Is there a Lost & Found Section at STL?

    There is a Lost & Found section maintained by the St. Louis Airport Police Department. Additionally, lost items are also recovered by the Transportation Security Administration (TSA) and if you wish to make an inquiry, do so between Monday and Friday. It’s also recommended to contact your airline for inquiries.

  • Is there a Car Rental Service at STL?

    To get to the car rental station, board the Enterprise Bus at the pick-up spot situated outside the baggage claim area. Here you’ll be assisted at the counter to get the rental agreement and vehicle keys but you may also find self-service stations for quick and easy rental transactions.

  • What are the travel options from STL to the city center?

    Aside from the Car Rental Service, other travel options to choose from include taking a taxi, a ride app, the MetroLink, or the bus service. The taxi zones are located at Terminal 1 Exit 14 and Terminal 2 Exit 12. The Ride App pick up zones are at Terminal 1 Exit 6 and Terminal 2 Exit 15. The MetroLink stations are at Terminal 1 Exit 1 and Terminal 2 Exit 12. Lastly, the Bus Port is located to the South of Terminal 1.

  • What is the cheapest flight from San Diego to St. Louis?

    In the last 3 days, the lowest price for a flight from San Diego to St. Louis was $109 for a one-way ticket and $240 for a round-trip.

  • Do I need a passport to fly between San Diego and St. Louis?

    Even though you are not required to have a passport, keep in mind that an official ID is needed to board the airplane.

  • Which airports will I be using when flying from San Diego to St. Louis?

    When flying out of San Diego you will be using San Diego. You will be landing at St. Louis, also known as Lambert-St Louis.

  • Which airlines offer Wi-Fi service onboard planes from San Diego to St. Louis?

    Alaska Airlines, American Airlines, JetBlue, and Delta offer inflight Wi-Fi service on the San Diego to St. Louis flight route.

  • Which aircraft models fly most regularly from San Diego to St. Louis?

    The Boeing 737-700 Passenger/BBJ1 (winglets) is the aircraft model that flies most regularly on the San Diego to St. Louis flight route.

  • On which days can I fly direct from San Diego to St. Louis?

    There are nonstop flights from San Diego to St. Louis on a daily basis.

  • Which is the best airline for flights from San Diego to St. Louis, Southwest or Delta?

    The two airlines most popular with KAYAK users for flights from San Diego to St. Louis are Southwest and Delta. With an average price for the route of $495 and an overall rating of 8.0, Southwest is the most popular choice. Delta is also a great choice for the route, with an average price of $279 and an overall rating of 8.0.

  • How does KAYAK find such low prices on flights from San Diego to St. Louis?

    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 San Diego to St. Louis.

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

    KAYAK’s flight Price Forecast tool uses historical data to determine whether the price for a flight to St. Louis from San Diego 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 San Diego to St. Louis?

    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 St. Louis with an airline and back to San Diego with another airline. Booking your flights between San Diego and STL 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 San Diego to St. Louis?

    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 St. Louis from San Diego 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 San Diego to St. Louis

  • Looking for a cheap flight? 25% of our users found flights on this route for $211 or less one-way and $467 or less round-trip.
  • For travelers with disabilities, San Diego International Airport (SAN) offers a variety of accessibility features including parking, TDD telephones, wheelchair services, visual paging monitors, courtesy carts, and reasonable accommodation upon request.
  • SAN and St. Louis Lambert International Airport (STL) each have 3 lactation rooms for nursing mothers. All the lactation rooms are equipped with comfortable seating, power outlets, and sinks. The Lactation Suites at STL are near Gate A10, near Gate C9, and near Gate E33. The Lactation rooms at SAN are located at Terminal 1 East Rotunda, Terminal 1 West Rotunda, and Terminal 2 West.
  • Both SAN and STL have USO Lounges providing an assortment of complimentary services to active members of the military and their families at no extra cost. The USO Lounge at SAN is located on the East Floor of Terminal 2 landside whereas STL has 2 USO Lounges located on the lower level of the Terminal 1 landside and near the baggage claim area at Terminal 2 landside.
  • In addition to the Volunteer Airport Ambassador team, SAN has a program known as ‘Ready, Pet, Go’ where trained therapy dogs offer relief and comfort to travelers under stress and anxiety. These friendly pups are paired with Volunteer Airport Ambassadors who act as additional eyes for safety and also offer additional airport information.
  • There is a children’s playground officially known as The St. Louis International Play Port which offers a pretend airport experience with a kid-sized plane, an airport screening area, a traffic control tower which has a slide and other amazing features. It is located within the C Concourse near Gate C3.
See more tips

Prefer to fly direct from San Diego to St. Louis?

Find which airlines fly direct from San Diego Airport to Lambert-St Louis Airport, which days they fly and book direct flights.

Direct departures

San Diego to Lambert-St Louis

Monday

Southwest

Southwest

Tuesday

Southwest

Southwest

Wednesday

Southwest

Southwest

Thursday

Southwest

Southwest

Friday

Southwest

Southwest

Saturday

Southwest

Southwest

Sunday

Southwest

Southwest

See more direct flights

Direct returns

Lambert-St Louis to San Diego

Monday

Southwest

Southwest

Tuesday

Southwest

Southwest

Wednesday

Southwest

Southwest

Thursday

Southwest

Southwest

Friday

Southwest

Southwest

Saturday

Southwest

Southwest

Sunday

Southwest

Southwest

See more direct flights
See more direct flights

Top 5 airlines serving from San Diego to St. Louis

 
See real verified KAYAK customer reviews for airlines flying from San Diego to St. Louis. 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 San Diego to St. Louis? 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
SouthwestOverall score based on 4276 reviews
8.6Crew
8.0Comfort
7.6Entertainment
7.1Food
8.2Boarding
Airline reviews

Great flight, 47 passengers on a 180 seat plane. Stewardess was pleasant and cheerful.

10.0 ExcellentAnonymous, Mar 2025SNA - OAK
Read more Southwest reviews

Great flight, 47 passengers on a 180 seat plane. Stewardess was pleasant and cheerful.

I liked the crew member who gave flight instructions on "in case of a problem:. The seats are so small that only a young teenager could sit in middle seat.

Great flight staff. Ease of boarding. Overall, very uneventful and easy trip.

Employees were kind and funny, as always! Flight was late but no announcements were made for people with tight connections to help them transition quickly. No service due to turbulence.

It was 2 hours 45 minutes late, for no apparently clear reason.

I recently flew Southwest from San Jose to Honolulu. I was very impressed with the flight crew, especially the flight attendant in charge of the front of the plane. She came through the aisle at least five times for drinks and water, and two times for snacks. I have not seen such service since I flew first class. Also, for the first time, they gave us the correct baggage claim number, and the luggage came out quickly. I can't wait for Southwest to have assigned seating! I absolutely hate the Cattle Call boarding procedure and the mad dash to get seats and overhead bins. However, the boarding was efficient.

Crew was great flight was great baggage claim was a failure. It took over 1 hour for bags to arrive. Poor communication poor effort when I spoke to the supervisor about the delay

Everything was great except the food. The pretzels are really crappy.

We had a nice flight. Boarding was easy, our seats were comfortable and the on board service was pleasant.

Service was great, boarding and exiting went smoothly, and the flight was very pleasant.

Thank you for not flipping the plane on the run way. You guys get a 5 star rating for the flight!!!

Boarding is, as it always is… horrible. Gate lice. Slow moving zones. Too many people with carry ons

It was terrible, if they ran flights on time it would make a big difference.

Delta seems to be improving in many areas, except they are super bad with the food available. Bring back normal food service on long flights.

I actually received a notification from kayak on email but not one by text from Delta when my departure gait changed and I almost missed my flight

New boarding doesn't make sense. Filling front first is slow.

Delta flight was great from the check in all the way to arrival. However, I had a very bad experience. I requested a wheelchair and the wheelchair employee that went to pick me up from the plane in Boston to bring me to the baggage claims told me I have to pay him. I was under the impression that it was a free service and I usually give tips but the person forced me to pay and since I said no because I was upset with his demand when my daughter walked in to pick me up he demanded payment from my daughter who paid him thinking maybe now it is a charged service.

Horrible. Grateful to be alive but spent 13 hours at airport only to return back to my familys house and flight changed to next day. They tried to fix a part on plane, had no back up plane and after 10 hours , reattempted the flight and it STILL wasn't fixed. We got a meal voucher and rescheduled flight but there should be some other compensation for the 15 hours spent in airport

My seat was changed at the last minute and I was moved to the last row, right next to the bathroom despite selecting my seat well in advance. I was also made to check my carry on due to space but when I got on the plane there was significant empty overhead space. Picking up my carry on from the luggage carousel added time to my trip which had already been extended due to delay.

There was plenty of overhead room but half of the passengers were told they had to check their carryon bags. My partner and I checked in as early as possible and our seats were split across the aisle.

The gate was too far away for the connecting flight

Compared with other carriers business class for an overnight was not worth the extra expense.

Easy to board. Flight was super crowded though so I didn't sleep well on that cross country red-eye flight. The aisles seem ot have gotten narrower and the seat smaller whn luggage and people are getting bigger so it would be AWESOME to have more space and breathing room in general ;)

Pilot Erika DeLong made us feel safe and at ease in a frankly scary time to be flying. Her warm smile and greeting and excellent command of the aircraft in foggy bumpy weather helped us all to calm our nerves and get us home safely.

Plenty of room for me and the cat in Premium Economy. Seat was comfortable. Boarding was a breeze. The lady at the special check-in desk was great, super helpful and professional.

Short flight - no food understandable. Flight was delayed for over an hour. Overall, it was good.

Wish movie and music choices changed more often. Mostly same from a month or two ago when I last flew.

It was good. Just that the seats could not be reclined. The people behind were not ready to let the chairs be reclined

Plane left & arrived early- 5 Crew great. Wi fi - paid for 2, only 1 worked - so so. Waste of $. Coolie was good

There was no USB plug in my section of the plane. So I could not charge my phone. Also, there was no screen to watch movie or anything like that. Wish I had known that in advance, I would’ve brought my iPad.

The plane was late and then sat on the runway for almost 45 minutes before taking off.

We kept being told that the flight was full and that all overhead compartments were full and therefore had to check in our hand luggage. We were some of the last people to board and noticed that there was still sufficient space in the overhead compartments. We were obliged to check in hand luggage when there was space and so had to wait at luggage retrieval which took a while to then noticed damage to our luggage - not a great experience!

This was an overnight flight. There was no meal service in first class, just a simple snack basket was offered along with beverages. There should have been some type of continental breakfast prior to arrival in PHL. As an Executive Platinum American Airlines Advantage member, I received no name recognition from the first class flight attendant. When disembarking at PHL, the flight attendants were more interested in their cell phones than saying "thank you" to the passengers as they disembarked.

The flight was quick and to the point. The crew just did their job w/o excessive talking and everything was just perfect.

Awkward carry on process. Forced to check all carry on. No overhead space of worthiness. Left delayed, but made up the time. Crew was amicable.

Amazingly comfy flight - I had upgraded for a reasonable price and it was worth it. The food also was good.

Had to wait on pilot and crew to depart and had to wait to arrive at the gate because they only had 2 crews working. Delays, delays....Planes just keep getting smaller and tighter and they nickle and dime for everything. When will an airline actually wake up and make flying more enjoyable?

I paid for what I got which was cheap, I brought my own entertainment. I knew what to expect, so I could be prepared. If you’re flying economy, check in early like me. I have no problems with my flight, was on time, staff were friendly, and overall good experience.

After several delays and being rebooked onto a layer flight, I had to speak to three AA agents for baggage claim to get an attendant. All were in foul mode and reluctant to assist or offer any assistance.

Improvements in communication and empathy are absolutely necessary for American Airlines staff (top down). It’s like they are numb to the needs of their customers.

Frontier had yet another flight cancellation. Have never made a complete round trip with this airline without at least one leg getting cancelled. Miserable flights - dirty, uncomfortable planes that apparently always have issues since I've had multiple delays and cancellations with them.

Flight was delayed 3 times, would have been nice to have received text message instead of email notifications. Frontier app wasn’t even updated accordingly, no gate number disclosed. No agent at front desk of gate to inform of delay. Very confused and left if the dark

They changed the timing , first delayed by 4 hours then went back to 40 mins late, we had to run back to airport to not miss our flight. This is ridiculous

No frills for sure. No gate announcements about flight delay, not even water to drink on the flight.

I loked walking out on the tarmac to board and no first class. I didn't like that they have no snacks or onboard wifi to bide your time.

It was a redeye flight, so every passenger just wanted to sleep, but through the entire flight, the flight crew made announcements over the loudspeaker at maximum volume every few minutes making sleep impossible. For example: it’s 2am, and the crew decides to give an extremely detailed announcement about snacks and beverages for sale. And 3am is the perfect time to wake up everyone with a lengthy announcement about how to get a coffee refill and how to take advantage of new offer from frontier for a credit card.

The takeoff was the smoothest I've ever experienced on any airline and this is the first time I've flown on frontier so this was an extremely pleasant surprise!

A lady asked to stop the flight after the tunnel pulled away and we began to depart a flight that was already hours late. The attendance respectfully stopped the the plane and had the tunnel return. After the tunnel returned the passenger claimed to have changed her mind . The tunnel was then put in reverse and the passenger remained on the plane .. They should have sent the sick passenger off the plane like initially replaced. They existed a couple off the plane prior to that situation.. So.. all and all.. it was a long and flight.. .

With frontier you get what you pay for. The flight was two hours late. It’s a tight fit for the number of people they bring but you get to where you’re going cheap. Sometimes that’s more important than a nifty drink and cool TV..

Charges unexpected. For seat that didnt recline. Please reverse extra seat and carryon charge. Bad business that is a bait and switch.

Everything you need to know for your flight from San Diego to St. Louis

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