SJU - STL

$101 Find Cheap Flights from San Juan 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 Juan to St. Louis departing on 7/31. 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 Juan 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 Juan to St. Louis, as well as popular online travel agencies
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Cheap Flight Deals from San Juan to St. Louis (SJU-STL)

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

KAYAK's recommended round-trip deals from the most popular airlines that fly from San Juan to St. Louis.
Discover the best prices for you by selecting your travel dates on KAYAK.
Choose your dates
Spirit Airlines Logo
5:41 pm - 7:49 amSJU-STL
15h 08m1 stop
Spirit Airlines Logo
8:44 am - 4:46 pmSTL-SJU
7h 02m1 stop
$201Spirit Airlines
Find Deal
Thu, Jul 31 - Mon, Aug 11
 Logo
8:12 pm - 9:15 amSJU-STL
14h 03m1 stop
 Logo
5:55 pm - 2:51 amSTL-SJU
7h 56m1 stop
Fri, May 9 - Fri, May 16
Delta Logo
6:15 am - 12:04 pmSJU-STL
6h 49m1 stop
Delta Logo
1:09 pm - 7:48 pmSTL-SJU
5h 39m1 stop
$261Delta
Find Deal
Fri, May 9 - Sun, May 11
Southwest Logo
5:35 am - 3:00 pmSJU-STL
10h 25m1 stop
Southwest Logo
2:40 pm - 11:30 pmSTL-SJU
7h 50m1 stop
$274Southwest
Find Deal
Thu, May 1 - Mon, May 12
Frontier Logo
4:39 pm - 12:06 amSJU-STL
8h 27m1 stop
Frontier Logo
5:55 pm - 2:51 amSTL-SJU
7h 56m1 stop
$298Frontier
Find Deal
Thu, May 1 - Fri, May 2
Frontier Logo
3:56 am - 12:06 amSJU-STL
21h 10m1 stop
Frontier Logo
5:55 pm - 2:51 amSTL-SJU
7h 56m1 stop
$308Frontier
Find Deal
Wed, Apr 30 - Fri, May 16
Delta Logo
2:15 pm - 8:30 pmSJU-STL
7h 15m1 stop
Delta Logo
1:30 pm - 10:12 pmSTL-SJU
7h 42m1 stop
$318Delta
Find Deal
Wed, Jul 30 - Tue, Aug 12
Southwest Logo
5:35 am - 3:00 pmSJU-STL
10h 25m1 stop
Southwest Logo
11:20 am - 9:05 pmSTL-SJU
8h 45m2 stops
$322Southwest
Find Deal
Thu, May 1 - Mon, May 12
American Airlines Logo
5:25 am - 8:58 pmSJU-STL
16h 33m1 stop
American Airlines Logo
5:12 am - 8:33 pmSTL-SJU
14h 21m1 stop
$424American Airlines
Find Deal
Tue, May 13 - Wed, May 14
American Airlines Logo
6:03 am - 4:34 pmSJU-STL
11h 31m2 stops
American Airlines Logo
6:00 am - 2:18 pmSTL-SJU
7h 18m1 stop
$429American Airlines
Find Deal
Wed, Jul 30 - Mon, Aug 11

Expert advice for your flight from San Juan to St. Louis

 
Snippets provided in this section are AI-generated based on a summarization of KAYAK-commissioned articles. The articles are presented as-is, for general informational purposes only, and may not be up-to-date. The opinions contained in the articles are original to the author and reflect their authentic experience, which may vary significantly from the experience of others.
KAYAK teamed up with top travel experts to share the best tips for your journey.
Airports
SJU

San Juan Airport is compact and efficient. Use the closest security checkpoint for quick access to all concourses.

Read more about SJUby Gabriel Leigh
STL

Use MetroLink for easy access to St. Louis. The Red Line connects the airport to key city areas like Delmar Loop and downtown.

Read more about STLby Yulia Denisyuk
Our travel experts
Yulia Denisyuk

Yulia Denisyuk

Expert on STL

Yulia Denisyuk

Yulia Denisyuk

Yulia is a freelance journalist who’s dispatched from 90+ countries. Her work focuses on cultures, adventure trips and air travel, appearing in NatGeo, NYT, CNTraveler, and more. For past assignments, she’s stayed with nomads in Mongolia and learned the art of Imigongo in Rwanda. She’s based in Chicago; in winter she often questions that decision.

Read more
Gabriel Leigh

Gabriel Leigh

Expert on SJU

Gabriel Leigh

Gabriel Leigh

Gabriel is a writer and video creator. As senior content producer for Flightradar24 and Monocle’s transport correspondent, he keeps a close eye on aviation in particular. He has also written travel articles for the likes of The New York Times. Born in New York but raised around the world, he now lives in Sweden. He’s been to 75 countries, flying 2.3 million miles on 113 airlines and through 234 airports in the process.

Read more

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

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

The average price of all round-trip flights from San Juan Luis Munoz Marin Intl Airport to St. Louis clicked on KAYAK for each day over the last 12 months.
Your flight ticket price will generally be cheaper if you fly to St. Louis on a Tuesday and more expensive on a Saturday. On your return trip to San Juan, you should consider flying back on a Wednesday, and avoid Saturdays for better deals.

What is the cheapest month to fly from San Juan Luis Munoz Marin Intl Airport 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 Juan Luis Munoz Marin Intl Airport 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 Juan Luis Munoz Marin Intl Airport to St. Louis is January, where tickets cost $286 (return) on average. On the other hand, the most expensive months are June and November, where the average cost of round-trip tickets is $540 and $469 respectively.

How far in advance should I book a flight from San Juan Luis Munoz Marin Intl Airport 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 Juan Luis Munoz Marin Intl Airport 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 Juan Luis Munoz Marin Intl Airport to St. Louis, you should book around 3 weeks before departure. For the absolute cheapest price, our data suggests you should book 17 weeks before departure.

Good to know

Low season

January

High season

February

Cheapest flight

$101
Best time to beat the crowds with an average 28% drop in price.
Most popular time to fly and prices are also 13% lower on average.
Flight from San Juan to St. Louis

When to book flights from San Juan to St. Louis

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

  • What is the cheapest flight from San Juan Luis Munoz Marin Intl Airport to St. Louis?

    In the last 3 days, the lowest price for a flight from San Juan Luis Munoz Marin Intl Airport to St. Louis was $101 for a one-way ticket and $201 for a round-trip.

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

    Yes

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

    San Juan and St. Louis are both served by 1 main airport. You will leave San Juan from San Juan Luis Munoz Marin Intl and will be arriving at Lambert-St Louis.

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

    Only American Airlines offers inflight Wi-Fi service on the San Juan to St. Louis flight route.

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

    The Airbus A321neo is the aircraft model that flies most regularly on the San Juan to St. Louis flight route.

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

    You can catch a nonstop flight from San Juan to St. Louis on Saturday.

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

    The two airlines most popular with KAYAK users for flights from San Juan to St. Louis are Delta and Southwest. With an average price for the route of $375 and an overall rating of 8.0, Delta is the most popular choice. Southwest is also a great choice for the route, with an average price of $573 and an overall rating of 8.0.

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

  • How does KAYAK's flight Price Forecast tool help me choose the right time to buy my flight ticket from San Juan 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 Juan 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 Juan 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 Juan with another airline. Booking your flights between San Juan 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 Juan 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 Juan up to 3 days before/after your preferred dates. You can then pick the flights that suit you best.

See more FAQs

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

Find which airlines fly direct from San Juan Luis Munoz Marin Intl Airport to Lambert-St Louis Airport, which days they fly and book direct flights.

Direct departures

San Juan Luis Munoz Marin Intl to Lambert-St Louis

Saturday

Southwest

Southwest

See more direct flights

Direct returns

Lambert-St Louis to San Juan Luis Munoz Marin Intl

Saturday

Southwest

Southwest

See more direct flights
See more direct flights

Top 4 airlines serving from San Juan to St. Louis

 
See real verified KAYAK customer reviews for airlines flying from San Juan 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 Juan 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 4279 reviews
8.2Boarding
8.0Comfort
7.1Food
8.6Crew
7.6Entertainment
Airline reviews

I would have liked to arrive on time - not 5 hours late!

4.0 OkayAnonymous, Apr 2025DEN - SEA
Read more Southwest reviews

I would have liked to arrive on time - not 5 hours late!

After a 3 hour layover in Denver my flight was delayed over 5 hours! No explanation; no assistance; no offer to provide compensation; no one at Southwest was willing to offer any assistance. 8 hours in the Denver airport - ridiculous!

It was a perfect flight in all aspects! Both legs!

Only one drink pass through the cabin for a 4 hour flight. Quite rough and bumpy landing.

Boarding process, crew were good. But the seats were so uncomfortable that was all I could focus on. I literally had to sit forward so that all 3 of us could fit in row. I will try to avoid Southwest in the future for any flights over 60 minutes.

1.5 hour delay, poor service, no compassion from the crew. Terrible experience

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

Short flight with plenty of open seats. Drinks and snacks were still provided even on such a short flight. <1 hr

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 experience flying Southwest. The crew was really kind and helpful, and very friendly with our toddler.

This had nothing to do with Delta… The flights were on time and flawless. The service was excellent. We purchased seats in (aisle/middle) comfort plus since this was a cross country flight. Unfortunately, the woman seated at the window was 300+ pounds and, as might be expected, covered up about a third of the middle seat also. there was absolutely nothing that Delta could have done about that… I just don’t know what the answer should be. If you purchase a seat, you should should be able to use the entire seat and not just the portion that someone else is not sitting/oozing in. Disappointing…there should be something that could be done….I'm just not sure what solution could be.

Delayed take-off. Very small plane so very scary with lots of bumps during the flight. Would never fly Delta on short flights in small 80 seaters plane again! Felt relieved when landed.

Delta is a cut above the others in customer service.

The worst part was I was NOT allowed in the lounge even though I was holding a first class ticket and have a premium American Express card. I have flown Business or First Class with many airlines. Delta is the ONLY one who does not extend this courtesy to anyone except people who hold the very expensive American Express card. As a result, I won’t fly Delta if I have any other choice.

A little bumpy ride . No food was being provided due the the turbulence. That was ok it was a short flight to my standards.

Simply outstanding. Their new lounge for Delta One customers is a cut above the rest.

I love the free WiFi!! Crew was nice. Bathroom was decent. First time flying delta in a long time and I enjoyed it. Will definitely look into booking with Delta more but I think Delta is a little more expensive than the other airlines.

third trip overseas with delta recently where the TV did not work- not acceptable for a 8 hour flight! your food really has declined crew great and I am loyal to delta

Boarding in Amsterdam is always chaotic. KLM/ Delta has not streamlined or made it efficient as it was boarding in Detroit . The food was mediocre The crew was unfriendly and more focused on getting things done quickly rather than service with a smile .

The Dekta Rep that checked us in was great. She's very personable, pleasant, and can tell she enjoys her job.

They lost my luggage and it didn’t get delivered until the next day.

Would have thought that they would gas up plane before everyone got on board

3 hours late. Not even water offered on a 2.25 hour flight.

I had a carry on and a personal bag. I put my personal item under my seat and on way to the seat I put my bag up. I usually close my eyes and rest as I was on call for last 36 hours. I heard very loud announcements that someone needs to identify their bag. Pretty sure it was not mine until the hostess pointed out my jacket details attached to the bag. I asked why she got my bag out. I got berated and did not want to create a scene. But this person needs to be talked to.

Terrible. The flight was delayed two hours due to weather. Then when we got on the plane, the first pilot ended up timing out and we had to wait for a second pilot. Second pile came on board and we tax it out. Had to return back to the gate because of an unruly passenger. Then the copilot timed out. Had to wait for new copilot. Also had to wait for maintenance to check for fuel. Then found out the second pilot timed out and we had to wait for a third pilot. Was ready to go and then needed maintenance again for another issue. In the end, it was 2 o’clock in the morning when they announced that the flight couldn’t go because the third pilot and the second copilot had timed out.

To start, I’d like to say that every American Airline personnel I interacted with on the ground, especially flight crew, was very friendly and did their best to help me out. Despite this, however, my experience with the airline was an entire mess. The 7:19 PM flight was heavily delayed due to weather, and pushed to 10:30 AM the next morning. Because of this, I had to spend the night inside of the airport. At some point later in the night, I got an email saying that the flight had been canceled. I called the support number, and the representative on the other line told me that the flight was still on and that I didn’t need to rebook. The next morning, no one came to the gate to open the door for the crew until almost 11 AM. By this time the flight crew had been waiting for over an hour, and they had called management to get someone to open the door for them multiple times. Around 11:30, the gate screen had changed to a different flight. I ended up buying a last minute ticket with Southwest airline just to get to Chicago, because the next flight with American wasn’t until 7:19 pm that day. Now, earlier that morning my suitcase had been sent ahead of me to ORD. I went to baggage claim to ask them if I could have my suitcase forwarded to where I was staying. The representative at SDF baggage claim said they could and put the claim in for me. As I was going back through TSA, I got an email that the airline had found my suitcase, but the next step was to send it BACK to SDF. I called the airline support number again, and I made it clear that my suitcase needed to stay in Chicago and to not come back to SDF. The representative told me that they would hold my suitcase at ORD and that it wasn’t going to be forwarded anywhere. Once I got there, I found that they had loaded my suitcase onto a plane to send it back to SDF. Thankfully, I had gotten to the baggage claim counter in time for them to put in a request to bring my suitcase back up. My refund with the airline is processing already, but because of this entire experience and miscommunication at every turn of the way, I will not book with American Airlines in the future.

American Airlines initially postponed the flight. Then they cancelled it an rescheduled us on a flight that would take over 24 hours with multiple stops. They then changed this flight to a reasonable alternative the next day which they later cancelled and replaced with a flight that would take off with an additional 16 hour delay. They blamed weather but I noticed (at 4am) that Delta had direct flights from Charlotte to Detroit. I went on line. Booked it and was in Detroit buy 9am. The interesting thing is they did a similar thing to a family member just 2 days earlier. I don't think I will fly American unless I have to.

Wonderful crew and early arrival to our destination. It was so nice to have free wifi access and movies too. Thank you!

Very friendly and efficient and smooth boarding. We were even way early arriving at my destination. Thank you.

The flight was late and we missed this connecting flight. American Airlines refused to put us anywhere for the night for their snafu. We had to find our own accommodations in Miami, and it was expensive for a crappy hotel.

Seats are uncomfortable but price is good. Guess I can put up with misery for four hours.

I’ve never traveled on Frontier before. If you want basic, no frills, friendly service at great prices then give them a fly!

I guess you get what you pay for. The seats are very uncomfortable and very little space. The snacks were pricey.

Cancelled and declined to find alternatives Earlier flight is 2 days later Sent the cancellation notification very late, wish I knew earlier would have stayed to watch the Miami open final game Very disappointing service

The worst flight of my life. Never will I fly frontier again

Landing in terminal 2, but my luggage is terminal 3. We (and others) were looking for it in terminal 1. We probably missed the crew broadcast, but the communication could have been clearer for non native (or elderly) passengers.

I chose the seats when booked the flight and paid for them. However after checking in I found we were assigned different seats!

Bag should not be so much money. This is how Frontier takes advantage of customers

The plane was comfortable. The time to board was way too slow and very unorganized! The crew was not as friendly as normally. The was not a single time that they offered water nor anything!!!

They switched my flight to Spirit, Never using Kayak again,

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

Information on your arrival and departure airports

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