$57 Find Cheap Flights from Puerto Rico 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 to St. Louis departing on 12/12. 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

Search 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 for flights 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 for flights to St. Louis, as well as popular online travel agencies
In the last 7 days travelers have searched 46,646,933 times on KAYAK, and here is why:

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Flights to St. Louis - Travel Insights & Trends

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

What is the cheapest day to fly to St. Louis?

The average price of all flights to St. Louis clicked on KAYAK for each day over the last 12 months.
Based on KAYAK data, the cheapest day to fly to St. Louis is Tuesday where tickets can be as cheap as $349. On the other hand, the most expensive day to fly is Sunday, where prices are $530 on average.

What is the cheapest month to fly to St. Louis?

To calculate monthly average prices, KAYAK takes all prices for each month over the last year for flights 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 to St. Louis is February, where tickets cost $341 on average for one-way flights. On the other hand, the most expensive months are June and August, where the average cost of tickets from Puerto Rico is $550 and $484 respectively. For return trips, the best month to travel is February with an average price of $341.

What is the cheapest time of day to fly to St. Louis?

The average price for all flights to St. Louis depending on the time of departure, clicked by users on KAYAK in the last 2 weeks.
The cheapest time of day to fly to St. Louis is generally at night, when flights cost $289 on average. The most expensive time of day to fly to St. Louis is generally in the morning, which is peak travel time and where the average cost of a ticket is $507.

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

To calculate daily average prices, KAYAK takes all prices for each day before departure over the last year for flights to St. Louis, 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, you should book around 0 weeks before departure. For the absolute cheapest price, our data suggests you should book 65 days before departure.

Good to know

Low season

January

High season

December

Cheapest flight

$57
Best time to beat the crowds with an average 3% drop in price.
Most popular time to fly and prices are also 2% lower on average.
Flight from San Juan to St. Louis

FAQs - booking St. Louis flights

  • How far is Lambert-St Louis Airport from central St. Louis?

    Lambert-St Louis Airport is 13 miles from the center of St. Louis.

  • What is the name of St. Louis’s airport?

    St. Louis is served by Lambert-St Louis Airport, also commonly referred to as Lambert Field, Lambert-St Louis, St. Louis Lambert, or St. Louis Lambert Intl. The airport code is STL.

  • How much is a flight to St. Louis?

    On average, a flight to St. Louis costs $267. The cheapest price found on KAYAK in the last 2 weeks cost $249 and departed from San Juan Luis Munoz Marin Intl Airport.

  • How does KAYAK find such low prices on flights 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 to St. Louis.

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

    KAYAK’s flight Price Forecast tool uses historical data to determine whether the price for a flight to 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 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 with another airline.

  • What is KAYAK's "flexible dates" feature and why should I care when looking for a flight 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 up to 3 days before/after your preferred dates. You can then pick the flights that suit you best.

  • How many direct flights to St. Louis are there each week?

    Each week there are around 2,260 direct flights from within Puerto Rico to St. Louis. The most common day for departures is Sunday, with 17% of flights taking off on this day.

See more FAQs

Top tips for finding cheap flights to St. Louis

  • Book at least 1 week before departure in order to get a below-average price.
  • High season is considered to be May, June and July. The cheapest month to fly from Puerto Rico is February.
  • Enter your preferred departure airport and travel dates into the search form above to unlock the latest St. Louis flight deals.

Prefer to fly non-stop to Lambert-St Louis?

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

Nonstop departures

Puerto Rico to Lambert-St Louis

Monday

ANA, Aer Lingus, Aeromexico, +39 more

ANA, Aer Lingus, +40 more

Tuesday

ANA, Aer Lingus, Aeromexico, +41 more

ANA, Aer Lingus, +42 more

Wednesday

ANA, Aer Lingus, Aeromexico, +40 more

ANA, Aer Lingus, +41 more

Thursday

ANA, Aer Lingus, Aeromexico, +40 more

ANA, Aer Lingus, +41 more

Friday

ANA, Aer Lingus, Aeromexico, +40 more

ANA, Aer Lingus, +41 more

Saturday

ANA, Aer Lingus, Aeromexico, +42 more

ANA, Aer Lingus, +43 more

Sunday

ANA, Aer Lingus, Aeromexico, +42 more

ANA, Aer Lingus, +43 more

See more direct flights

Nonstop returns

Lambert-St Louis to Puerto Rico

Monday

ANA, Aer Lingus, Aeromexico, +39 more

ANA, Aer Lingus, +40 more

Tuesday

ANA, Aer Lingus, Aeromexico, +41 more

ANA, Aer Lingus, +42 more

Wednesday

ANA, Aer Lingus, Aeromexico, +40 more

ANA, Aer Lingus, +41 more

Thursday

ANA, Aer Lingus, Aeromexico, +40 more

ANA, Aer Lingus, +41 more

Friday

ANA, Aer Lingus, Aeromexico, +40 more

ANA, Aer Lingus, +41 more

Saturday

ANA, Aer Lingus, Aeromexico, +42 more

ANA, Aer Lingus, +43 more

Sunday

ANA, Aer Lingus, Aeromexico, +42 more

ANA, Aer Lingus, +43 more

See more direct flights
See more direct flights

Top 4 airlines serving from Puerto Rico to St. Louis

 
See real verified KAYAK customer reviews for airlines flying to St. Louis. Airline scores are aggregated from all reviews left by passengers on KAYAK after flying with an airline from Puerto Rico to St. Louis. KAYAK doesn’t show reviews that are older than 5 years. Learn how KAYAK collects reviews.
Need help choosing which airline to fly with 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
DeltaOverall score based on 8755 reviews
7.9Entertainment
7.9Comfort
7.3Food
8.2Boarding
8.5Crew
Airline reviews

I sat in comfort plus. It was fine. Seats were comfortable. I got drinks and snacks.

8.0 ExcellentAndrew, Nov 2024MCO - LGA
Read more Delta reviews

I sat in comfort plus. It was fine. Seats were comfortable. I got drinks and snacks.

Crew was nice. Flight was timely. Seats could be better as well as the food considering it’s first class.

Left on time and arrived early this extending our 31 minute transfer. Bags made it also!

Good and consistent Printer in lounge did not work for me :(

Most of my discomfort was going through TSA. However, the Delta seats had inadequate leg room and I tried my very best to connect to the wi-fi and it was a cumbersome process that finally gave me the info that I needed to sign in AFTER I had completed the flight...Why make it so difficult to use? That said I really really appreciate the pilot taking a little extra time to avoid a bad storm area and both landings in Atlanta and Orlando were flawless to my delight!!!

Delayed in taking off because no flight crew. The in seat entertainment was working properly.

I love my flight attendant Faith, always smiles always helpful. She makes the flight experience wonderful thank you

My return flights were changed by the airline and my preferred seat selection with extra legroom was not transferred to the new flights

I upgraded to first class only to find out that I still had no access to the sky lounge without a sky miles card or AmEx (something that should be emphasized outside of the fine print!) Also, no food or drink service provided during the flight, so I basically paid 4x more just for “free” checked baggage and a bigger seat. Not worth it.

Very dissatisfied with the fact that I had upgraded to first class for the second part of my trip only to find out that the lounge was still not available to me, as well as not having any food or drink service on the flight due to weather, so I lost out more than what I paid for.

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.

Staff was generally seeming stressed out and was a bit rude and slow. Plane left late. Pilot was very well-spoken.

Service was great, we had bad departure and bad arrival due to weather, but that we cannot control. Hats off to the pilot!

The flight attendants were unhelpful. It was a packed flight, and usually a flight attendant would help find a spot in the bin for your carry on or shift things around. Neither made any effort to do so. Also, I had to then check my bag. I was told it would be on the carousel in YYZ, but it came up on the jetway. So lucky I saw others standing around for their bags. I would have walked straight past this and on to the carousel. They could have at least told me that they had given me wrong information. Very unsatisfactory.

Made all groups except 2 check despite ample bin space. Inflight WiFi and entertainment didn’t work most of the time.

The check-in process is not the best They should have agents in site to help with any problem especially a rebook. Why does one have to get on the phone when there were at least 8 agents around that could have help?! Flying is stressful as it is and having someone willing to do their customer service will ease some of the stress.

The crew was outstanding. And the food was surprisingly good. The chicken and the pasta dish were both delicious and I was supposed with a pizza twist near Landing. We hit a lot of turbulence and the crew was calm and kind. Loved the TV in screen. Tons of new releases.

It was a good flight. Nothing comes to mind about how it could have been better. It was a newer plane, seemed like a great upgrade from your older ones. Staff was very good as well.

boarding was uneventful. Snack was pathetic. A tiny fruit bar. Entertainment was limited to just select movies on your own tablet or phone. No live TV. I recently flew Jetblue and they had unlimited snacks and live satellite TV the entire flight. My seat was an exit seat, 20A. It was super uncomfortable. It felt cramped and the middle seat was taken up by a large woman who pushed into my shoulder and arm. Horrible flight.

They canceled our flight and left us stranded to figure it out

Finding the gate was very confusing. Our boarding pass listed one gate and the staff verbally told us a different gate.

Plenty of overhead space but forced to check my carry-ons both legs

My flight attendant was attentive! The elderly person next to me was flatulent and the flight attendant could see that I was in distress and brought me some face masks

It was as expected for such a short flight. No complaints

Great thanks - a whole row to myself. Good food but film selection not great.

The departing flight from Newark to Charlotte was fine. It was the returning flight from Charlotte to Newark that was awful. We had scheduled an 8:35pm return flight time. We got delayed TEN times all the way to 5am in the morning! We were told over 4 different excuses as to why the flight kept getting delayed. First it was the flight crew needed to rest, then it was something technical with the plane, then it was something with air traffic control, and finally it was because they couldn’t find a captain and had to wait until the morning so the captain could get some rest. It was terrible sleeping overnight in the airport. They offered a $12 meal voucher. That was it! And the only place open in the middle of the night was Dunkin’ Donuts who didn’t even accept the voucher. They should have cancelled the flight much earlier on in the evening instead of just stringing us along hour by hour with more delays. Not professional and unacceptable. There was no refund for inconvenience. I probably will not be flying American Airlines again.

This leg they tried and did well with what they had to work from.

It was nice being on a flight that had working wifi. The boarding was quick - why don’t all airlines have small boarding groups window to aisle? Makes so much sense!!! I was disappointed to be the first person stopped to have to gate check my carryon. Especially when there was plenty of overhead space at the back! But I get it…keeps it moving. Crew was nice.

The flight was as good as it gets when flying. On time departure and arrival plus no lost luggage.

My boarding pass wouldn't pull up in the app very easily and had to really dig through my email. That caused a delay in TSA..

My first flight was moved 6 hours causing me to miss my meeting. The second was delayed about an hour and a half. Most of the crews apparently dont like their jobs or just working for Frontier. Only one flight attendant wasn"t snappy or rude.

Booked direct in July '24. Turned into a 14 hr layover (both ways) in Denver. My 5 day vaca turned into a 1 day . Not good, BUT,... Thank you for the people @ Frontier who were professionally friendly & approachable.

Stop changing gates at sfo. When you are elderly going back for it’s not fun.

We understand and comply with Frontier’s bag sizes. We’ve had some problems in past while having to await other passengers who do not understand the baggage restrictions or have not prepaid and that is usually our biggest concern (others delaying us) with flying Frontier. Flying OUT of ONT, however, has always been a great experience. I’ve also noted even on delayed Frontier flights very knowledgeable pilots who manage expectations well.

There was no easy way to check in. I don't want to install an app to checkin. I will use alaska from now on because they have a web check in method that is easy.

The crew was ghetto lol I felt like I was on an inner city field trip

Horrible! The short distance flight ended up taking 5 hrs! There was a 3 hr delay for the flight to take off and there was a 70 min wait on the tarmac for some bogus reason that the pilot said the gate he was supposed to board was taken up. After a 30 min wait he said the plane that was supposed to push out of the gate called a medical emergency and 40 min later he ended up boarding another gate. For the initial 3 hr delay there was no information/alert about the gate or delay in the app or the boards up until the boarding time and even beyond! Had to walk all the way to the end of the terminal to find the frontier staff to ask what was going on. Avoid this airline at all costs! If you have carryon bags or checked bags , their prices come equivalent to the prices of more reliable airlines. They are the worst in timeliness at 60% (reported as delayed) this year (check the data) by a high margin even compared to the second worst airline. If you are ok with having a miserable flight experience with the odds close to flip of a coin, feel free to try them. If you value your time , money and flying experience, stay away.

There was nothing to like, flight delayed had to move to different departure areas, disorganized to say the leasr

Delayed for two hours due to trivial issues. No reimbursment. Also on arrival further delay due to terminal malfunction.

Our flight was canceled for no known reason. We weren’t told until we were checking in at 5:00 am. This was after our last flight with Frontier where we sat on the plane for three hours (not an exaggeration) before we took off because of a mechanical issue. We won’t be flying Frontier again.

Book cheap flights from Puerto Rico to St. Louis

Recent round-trip flight deals

 
These are the cheapest round-trip flights to St. Louis found on KAYAK in the last 72 hours.
12/5Thu
1 stopFrontier
10h 21mSJU-STL
12/9Mon
1 stopFrontier
24h 29mSTL-SJU
$152
2/6Thu
1 stopFrontier
27h 42mSJU-STL
2/11Tue
1 stopFrontier
14h 30mSTL-SJU
$175
12/5Thu
1 stop
8h 19mSJU-STL
12/9Mon
1 stop
23h 06mSTL-SJU
$231
1/28Tue
2 stops
29h 01mSJU-STL
2/4Tue
1 stop
24h 43mSTL-SJU
$238
2/6Thu
2 stopsAmerican Airlines
11h 21mSJU-STL
2/11Tue
2 stopsAmerican Airlines
9h 30mSTL-SJU
$264
2/13Thu
2 stopsAmerican Airlines
9h 51mSJU-STL
2/18Tue
2 stopsAmerican Airlines
9h 56mSTL-SJU
$269
4/24Thu
1 stopDelta
11h 43mSJU-STL
4/29Tue
1 stopDelta
6h 30mSTL-SJU
$303
1/14Tue
1 stopUnited Airlines
10h 42mSJU-STL
1/21Tue
1 stopUnited Airlines
8h 21mSTL-SJU
$354
2/5Wed
1 stopUnited Airlines
10h 42mSJU-STL
2/11Tue
1 stopUnited Airlines
8h 21mSTL-SJU
$393
4/9Wed
2 stopsDelta
12h 02mSJU-STL
4/14Mon
2 stopsDelta
12h 39mSTL-SJU
$3,126

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Recent one-way flight deals

 
Only flying one-way? Below are some of the best deals for one-way flights to St. Louis found on KAYAK in the last 72 hours.
12/12Thu
1 stopFrontier
8h 19mSJU-STL
$57
12/17Tue
1 stopFrontier
8h 50mSJU-STL
$64
2/20Thu
1 stopDelta
11h 15mSJU-STL
$132
12/12Thu
2 stopsAmerican Airlines
9h 19mSJU-STL
$135
12/11Wed
1 stop
22h 39mSJU-STL
$139
2/18Tue
1 stopDelta
10h 00mSJU-STL
$152
12/5Thu
3 stops
51h 33mSJU-STL
$166
1/22Wed
2 stopsUnited Airlines
12h 11mSJU-STL
$177
12/17Tue
2 stopsUnited Airlines
15h 29mSJU-STL
$216
1/9Thu
2 stopsAmerican Airlines
9h 06mSJU-STL
$291

Search by stops

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Last minute flights to St. Louis

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 to St. Louis that are departing in the next 10 days.
11/25Mon
multi-stopFrontier
29h 42mSJU-STL
12/3Tue
multi-stopFrontier
18h 52mSTL-SJU
$299
11/25Mon
multi-stopFrontier
29h 42mSJU-STL
12/4Wed
multi-stopFrontier
14h 51mSTL-SJU
$361
11/26Tue
multi-stopFrontier
26h 11mSJU-STL
12/4Wed
multi-stopFrontier
14h 51mSTL-SJU
$382
11/26Tue
multi-stopFrontier
21h 39mSJU-STL
12/3Tue
multi-stopFrontier
24h 29mSTL-SJU
$403
11/26Tue
multi-stopAmerican Airlines
11h 14mSJU-STL
12/3Tue
multi-stopAmerican Airlines
7h 52mSTL-SJU
$584
11/26Tue
multi-stopAmerican Airlines
11h 15mSJU-STL
12/3Tue
multi-stopAmerican Airlines
14h 49mSTL-SJU
$619
11/25Mon
multi-stopUnited Airlines
12h 14mSJU-STL
12/4Wed
multi-stopUnited Airlines
8h 21mSTL-SJU
$729
11/25Mon
multi-stopSpirit Airlines
15h 41mSJU-STL
12/3Tue
multi-stopSpirit Airlines
25h 01mSTL-SJU
$742
11/25Mon
multi-stopUnited Airlines
14h 20mSJU-STL
12/3Tue
multi-stopUnited Airlines
14h 31mSTL-SJU
$769
11/23Sat
multi-stopDelta
8h 04mSJU-STL
11/30Sat
multi-stopDelta
7h 58mSTL-SJU
$779

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Everything you need to know for your flight to St. Louis

Information on the airport you'll fly into in St. Louis

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