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STL - SJU

$58 Find cheap flights from St. Louis to San Juan

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 San Juan departing on 8/20. 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
Fri 6/14
Fri 6/21

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These are the airlines KAYAK users have selected most often from within our search results in flight searches from St. Louis to San Juan.
These are the airlines KAYAK users have selected most often from within our search results in flight searches from St. Louis to San Juan.
In the last 7 days travelers have searched 42,393,389 times on KAYAK, and here is why:

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Cheap flight deals from St. Louis to San Juan (STL-SJU)

 
These are the cheapest deals for flights from St. Louis to San Juan currently on KAYAK along with options from the most popular airlines KAYAK users selected for this route. 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 St. Louis to San Juan

Recommended round-trip deals departing in the coming months from the most popular airlines that fly from St. Louis to San Juan.

Recent one-way flight deals from St. Louis to San Juan

Only flying one-way? Below are some of the best one-way flight deals from St. Louis to San Juan found on KAYAK recently.

Recent last minute flight deals from St. Louis to San Juan

Leaving soon but still want a bargain? Check out these latest deals for last minute flights from St. Louis to San Juan.

Recent direct flight deals from St. Louis to San Juan

The latest deals for direct flights from St. Louis to San Juan so you can sit back and relax without the need for a layover.

Cheap bus & train deals from St. Louis to San Juan

Find recent round-trip train or bus tickets from St. Louis to San Juan.

All round-trip flight deals to San Juan

The cheapest plane tickets to San Juan found on KAYAK recently.
Discover the best prices and deals for you by selecting your travel dates.
Choose your dates
6:22 pm - 11:30 amSTL-SJU
16h 08m1 stop
10:15 pm - 7:07 amSJU-STL
9h 52m1 stop
Sat, Jun 8 - Sat, Jun 15
11:57 am - 1:09 amSTL-SJU
12h 12m1 stop
3:33 am - 10:24 amSJU-STL
7h 51m1 stop
$235Spirit Airlines
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Tue, Jun 25 - Mon, Jul 15
6:22 pm - 11:30 amSTL-SJU
16h 08m1 stop
3:08 am - 7:07 amSJU-STL
28h 59m1 stop
Sat, Jun 8 - Fri, Jun 14
7:44 pm - 1:54 amSTL-SJU
29h 10m1 stop
6:18 pm - 7:08 amSJU-STL
13h 50m1 stop
$244Frontier
Find Deal
Tue, May 28 - Sat, Jun 1
8:02 pm - 2:51 pmSTL-SJU
17h 49m2 stops
3:08 am - 7:07 amSJU-STL
28h 59m1 stop
$245Frontier
Find Deal
Sat, Jun 8 - Fri, Jun 14
5:30 am - 3:00 pmSTL-SJU
8h 30m1 stop
6:30 am - 5:06 pmSJU-STL
11h 36m2 stops
$313American Airlines
Find Deal
Wed, Aug 7 - Wed, Aug 14
9:50 am - 12:22 amSTL-SJU
13h 32m1 stop
6:33 am - 5:14 pmSJU-STL
11h 41m2 stops
$314American Airlines
Find Deal
Thu, Sep 26 - Sat, Sep 28
11:51 am - 10:03 pmSTL-SJU
9h 12m1 stop
6:14 pm - 11:35 pmSJU-STL
7h 21m1 stop
$434Delta
Find Deal
Wed, Oct 30 - Sat, Nov 9
5:30 pm - 5:30 amSTL-SJU
11h 00m2 stops
1:05 am - 2:36 pmSJU-STL
14h 31m2 stops
$479United Airlines
Find Deal
Sat, Jul 20 - Fri, Jul 26
3:43 pm - 11:51 pmSTL-SJU
7h 08m1 stop
1:05 am - 2:36 pmSJU-STL
14h 31m2 stops
$554United Airlines
Find Deal
Sat, Jul 20 - Fri, Jul 26
10:34 am - 7:11 pmSTL-SJU
7h 37m1 stop
$58Spirit Airlines
Find Deal
Tue, Aug 20
10:34 am - 7:11 pmSTL-SJU
7h 37m1 stop
$104Spirit Airlines
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Tue, May 21
9:20 pm - 11:05 amSTL-SJU
12h 45m1 stop
$109Frontier
Find Deal
Mon, Aug 19
8:02 pm - 2:51 pmSTL-SJU
17h 49m2 stops
$117Frontier
Find Deal
Sat, Jun 15
11:58 am - 12:38 amSTL-SJU
10h 40m2 stops
$157American Airlines
Find Deal
Sat, Nov 9
5:30 am - 4:40 pmSTL-SJU
10h 10m2 stops
$160American Airlines
Find Deal
Tue, Aug 20
7:30 pm - 7:05 pmSTL-SJU
22h 35m2 stops
Fri, Jun 21
7:30 pm - 11:30 amSTL-SJU
39h 00m3 stops
Fri, Jun 21
5:18 pm - 1:45 pmSTL-SJU
19h 27m3 stops
$319United Airlines
Find Deal
Tue, Aug 20
5:37 pm - 2:40 pmSTL-SJU
19h 03m3 stops
$323United Airlines
Find Deal
Sat, Nov 9
5:25 pm - 2:09 amSTL-SJU
7h 44m1 stop
6:03 pm - 7:08 amSJU-STL
14h 05m1 stop
$328Frontier
Find Deal
Sat, May 18 - Mon, May 20
7:44 pm - 10:47 amSTL-SJU
14h 03m1 stop
5:59 pm - 8:26 pmSJU-STL
27h 27m1 stop
$342Frontier
Find Deal
Fri, May 17 - Sun, May 19
7:44 pm - 1:55 pmSTL-SJU
17h 11m1 stop
6:03 pm - 7:08 amSJU-STL
14h 05m1 stop
$357Frontier
Find Deal
Thu, May 16 - Mon, May 20
9:45 am - 3:31 pmSTL-SJU
28h 46m2 stops
11:59 pm - 1:37 pmSJU-STL
14h 38m1 stop
Sat, May 18 - Mon, May 20
7:44 pm - 11:27 amSTL-SJU
14h 43m1 stop
10:18 pm - 7:08 amSJU-STL
9h 50m1 stop
$413Frontier
Find Deal
Thu, May 16 - Sat, May 18
9:45 am - 10:14 pmSTL-SJU
35h 29m3 stops
11:59 pm - 1:37 pmSJU-STL
14h 38m1 stop
Sat, May 18 - Mon, May 20
5:04 am - 5:05 pmSTL-SJU
11h 01m1 stop
12:45 am - 10:37 amSJU-STL
10h 52m1 stop
$673American Airlines
Find Deal
Fri, May 17 - Sat, May 18
7:30 am - 4:40 pmSTL-SJU
8h 10m2 stops
1:35 pm - 10:59 pmSJU-STL
10h 24m2 stops
$688American Airlines
Find Deal
Thu, May 16 - Mon, May 20
6:19 am - 3:42 pmSTL-SJU
8h 23m1 stop
1:05 am - 10:17 amSJU-STL
10h 12m2 stops
$781United Airlines
Find Deal
Thu, May 16 - Fri, May 17
11:10 am - 11:57 pmSTL-SJU
11h 47m2 stops
1:05 am - 10:59 amSJU-STL
10h 54m1 stop
$1,080United Airlines
Find Deal
Sat, May 18 - Sun, May 19

Flights from St. Louis to San Juan - Travel Insights & Trends

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

The average price of all flights from St. Louis to San Juan Luis Munoz Marin Intl Airport clicked on KAYAK for each day over the last 12 months.
If you are looking for a flight deal from St. Louis to San Juan, look for departures on Wednesdays and avoid leaving on a Friday, as it's usually the priciest day. When flying back from San Juan, Thursday is the cheapest day to fly and Sunday is the most expensive.

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

To calculate monthly average prices, KAYAK takes all prices for each month over the last year for flights from St. Louis to San Juan Luis Munoz Marin 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 San Juan Luis Munoz Marin Intl Airport is April, where tickets cost $344 on average. On the other hand, the most expensive months are December and November, where the average cost of tickets is $587 and $549 respectively.

How far in advance should I book a flight from St. Louis to San Juan Luis Munoz Marin 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 San Juan Luis Munoz Marin 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 San Juan Luis Munoz Marin Intl Airport, you should book around 1 day before departure. For the absolute cheapest price, our data suggests you should book 90 days before departure.

Which airlines provide the cheapest flights from St. Louis to San Juan?

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 Spirit Airlines ($58) and Frontier ($109). The cheapest round-trip tickets were found on Spirit Airlines ($235) and Frontier ($244).

How many flights are there between St. Louis and San Juan Luis Munoz Marin Intl Airport per day?

Each day, there are 2 nonstop flights that take off from St. Louis and land in San Juan Luis Munoz Marin Intl Airport, with an average flight time of 4h 30m. The most common departure time is 9:00 am and most flights take off in the morning. Each week, there are 2 flights and there are the same amount of flights each day 2.

What’s the earliest departure time from St. Louis to San Juan?

Early birds can take the earliest flight from St. Louis at 9:30 am and will be landing in San Juan Luis Munoz Marin Intl Airport at 3:00 pm.

What’s the latest departure time from St. Louis to San Juan?

If you prefer to fly at night, the latest flight from St. Louis to San Juan Luis Munoz Marin Intl Airport jets off at 9:35 am and lands at 3:05 pm.

Good to know

Low season

October

High season

March

Cheapest flight

$58
Best time to beat the crowds with an average 12% drop in price.
Most popular time to fly with an average 11% increase in price.
Flight from St. Louis to San Juan

When to book flights from St. Louis to San Juan

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

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

    In the last 3 days, the lowest price for a flight from St. Louis to San Juan Luis Munoz Marin Intl Airport was $58 for a one-way ticket and $226 for a round-trip.

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

    Yes, you'll most likely have to show a valid passport before boarding the plane in St. Louis and on arrival in San Juan.

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

    We unfortunately don’t have that data for this specific route.

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

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

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

    The two airlines most popular with KAYAK users for flights from St. Louis to San Juan are Delta and United Airlines. With an average price for the route of $435 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 $645 and an overall rating of 7.4.

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

    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 San Juan.

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

    KAYAK’s flight Price Forecast tool uses historical data to determine whether the price for a flight to San Juan 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 San Juan?

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

    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 San Juan 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

Prefer to fly non-stop from St. Louis to San Juan?

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

Nonstop departures

Lambert-St Louis to San Juan Luis Munoz Marin Intl

Saturday

Southwest

Southwest

See more direct flights

Nonstop returns

San Juan Luis Munoz Marin Intl to Lambert-St Louis

Saturday

Southwest

Southwest

See more direct flights
See more direct flights

Top 5 airlines serving from St. Louis to San Juan

 
See real verified KAYAK customer reviews for airlines flying from St. Louis to San Juan. 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 San Juan? 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 10691 reviews
8.6Crew
7.4Food
7.9Comfort
8.2Boarding
8.0Entertainment
Airline reviews

Absolutely nothing flight was cancelled and delayed for 2 days. Barely a heads up I want a full refund

2.0 MediocreDevan, May 2024AUS - BOS
Read more about Delta reviews

Absolutely nothing flight was cancelled and delayed for 2 days. Barely a heads up I want a full refund

The plane from SNA wouldn’t start after 5 tries. The team gave me an option of flying direct from LAX and giving me a Lyft ride there! Perfect!

Best airline! Always friendly and welcoming. Skyclub was great and loved the fast free wifi on board. I also love that you can pre-order your meal on the app!

Atlanta boarding crew at gate were filled with arrogance and were disrespectful. In flight crew showed indifference to the needs of passengers. This is about the flight from ATL to BDL.

The plane was FREEZING SEATS UNCOMFORTABLE Otherwise smooth Thank you

Boarding was chaotic. I didn’t finish dinner because I went to bed early. Breakfast omelet was overcooked and tasteless but croissant was better than usual. Plane was dirty—crumbs in every seam and lavatory was poorly maintained (paint peeling, etc.) and toilet paper had not been refreshed before takeoff. No cubby for storage in first and seat was narrow.

Boarding was somewhat chaotic. Unable to evaluate crew or food/drink because captain kept them seated due to turbulence. Have no idea if entertainment was offered.

West Jet has a horrible boarding process and the seats have no cushion.

Everything went smoothly. I didn’t like that when I booked in the main cabin my wife and I weren’t seated together. One would think when booking on an option that allows picking your seat. They would put you and your travel partner together. Had to call to get it sorted. They did fix.

The gate area was incredibly short staffed, with one representative manning 4-5 flights, which caused a 3 hr delay in boarding even though the plane was all ready to leave. Other flights also were delayed because of this. The flight crew was awesome and I feel bad for the only gate worker on call, but Delta needs to hire more employees.

Not a fan of the diagonal partially enclosed business class seats or how they have to be converted to beds manually by crew. I prefer more isolation and user control for switching to lie flat.

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.

Energetic crew - flight full of swiftied going to Taylor's opening show in Paris! Long lines for bathroom made out kind of suck though

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

Flight was delayed 2.5 hours - a big deal on an overnight when you plan to sleep.

I feel like they have upgraded the app since I last flew United and I found it to be super helpful. I had stopped flying United unless absolutely necessary and my experience on this trip indicates they have been working hard to improve their services.

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..

This flight was delayed multiple times and eventually canceled around 2-3ish. Original take off time was around 10:30am. By 3, there were no other options out of Houston, so stuck in Houston for from 3pm - 11am the next day.

Tray table was filthy when I sat down. I needed to have someone come clean it because there was food and stains on it WiFi didn’t work after paying for in flight WiFi Food was terrible and was not filling at all Chicken was rubbery Flight attendant had an attitude, interrupted me and wasn’t able to answer basic questions about the food selection such as “does the chicken have red sauce in it”. If your flight attendants are not going to know what is in the meals so we can make an educated decision based on dietary restrictions, they shouldn’t be on the plane. My 1.5 year old niece was sleeping and dropped her binkie. I went on the ground under the chairs looking for it. It was at that time that she came up to me as I’m CLEARLY on all 4s with a flashlight and said “I need to get by”. I said one moment please I’m getting something from under the seat (while my head was literally under the seat). Her reply was “no you need to move now” and proceeded to almost push me out of the way. I looked up and all I saw was her toes under my eyes. When I looked in front of me, her private parts were inches away from my face. I then made a comment “you couldn’t waited 2 seconds?” and her response was, “no I need to use the bathroom”. I understand that and would never want to be the reason someone couldn’t get to the bathroom but I was under the seat. She could’ve gone around the other way instead of harassing me, basically placing her private parts on my head and borderline pushing me out of the way. You don’t pay (especially this much) for this deplorable experience. This was by far the worst experience I have ever had on American. I will be absolutely thinking twice and thrice about flying American Airlines again. I would rather pay more to fly delta because at least I know their WiFi will work and their flight attendants won’t have a terrible attitude for no reason, nor will they act the way this woman did. Unacceptable.

Tray table was filthy when I sat down. I needed to have someone come clean it because there was food and stains on it WiFi didn’t work after paying for in-flight WiFi. Food was terrible and was not filling at all Chicken was rubbery Flight attendant had an attitude, interrupted me and wasn’t able to answer basic questions about the food selection such as “does the chicken have red sauce in it”. If your flight attendants are not going to know what is in the meals so we can make an educated decision based on dietary restrictions, they shouldn’t be on the plane. My 1.5 year old niece was sleeping and dropped her binkie. I went on the ground under the chairs looking for it. It was at that time that she came up to me as I’m CLEARLY on all 4s with a flashlight and said “I need to get by”. I said one moment please I’m getting something from under the seat (while my head was literally under the seat). Her reply was “no you need to move now” and proceeded to almost push me out of the way. I looked up and all I saw was her toes under my eyes. When I looked in front of me, her private parts were inches away from my face. I then made a comment “you couldn’t waited 2 seconds?” and her response was, “no I need to use the bathroom”. I understand that and would never want to be the reason someone couldn’t get to the bathroom but I was under the seat. She could’ve gone around the other way instead of harassing me, basically placing her private parts on my head and borderline pushing me out of the way. You don’t pay that much for this deplorable experience. This was by far the worst experience I have ever had on American. I will be absolutely thinking twice and thrice about flying American Airlines again. I would rather pay more to fly delta because at least I know their WiFi will work and their flight attendants won’t have a shitty attitude for no reason, nor will they act the way this woman did. Unacceptable.

Liked - nothing. Disliked - delayed 35+ min sitting on the plane. Caused me to miss my connection in Charlotte. American Airlines is the worst US Air Carrier company with atrocious customer service.

Worst situation ever! I booked my tickets for this trip on Alaska Airlines. I guess AA is a partner and we flew nonstop from Eugene to PHX on an AA jet. I had to pay for luggage from PHX to EUG. And this was an Alaska Airlines reservation paid for with Alaska airlines credit card! Got to the PHX airport and was not able to check bags because of some weird issue with the AA software. My reservation had to be the-entered by the agent. I will never pick another American Airlines flight on the Alaska Airlines website. While on vacation, I tried to upgrade our seats for the trip home. The request just buffered and never went through. I tried four times and was charged four times on my credit card. The card was charged but the seats were never changed. What a wreck!

Left from gate 30 minutes before flight. Never been late to a flight ever. It says 15 minutes before explicitly on the ticket.

I like the boarding process, it was fast. The seat doesn’t have a TV for a long flight and food wasn’t served, just snacks.

Use planes with TVs on flights over 4 hours. The free entertainment was a cheap in between solution for a very long flight that you don't even bother providing meals or decent snacks.

Even though we left CMI late, we mostly made up the time.

Delayed almost 4 hours for a 45 minute flight with no explanation.

Again, multiple delays and I eventually just canceled and drove!

Worst airline experience ever. Lost my IPad going thru security. Charged for my dog carriage at the gate not at ticket counter. Gave away my seat 6D. Expressed I wanted my seat back after charging me 99 for dog carriage. Should have thrown it out. Had a 16 yr old Yorkie heading to Boston after being a snowbird. Seats small. Very bad experience. Still don’t have my IPad. Horrible

My mother was HARASSED AND ACCOSTED by the gate agent for her bag. I pre purchased the bag fee and the gate agent made my 78 year old mother board, deplane, re pay for her bag fee and board again. The gate agent made my mother pick up her own bag and REFUSED to help her, she is an older woman who wasn’t bothering anyone on a flight that had maybe 30’total passengers. I am going to sue this airlines for their HORRIBLE customer service and treatment of my mother, and all this occurred the day after Mother’s Day!!!

The boarding gate was moved so many times that I missed my flight. No attendants would help me. The wrong gate was even on my boarding pass. I had to repurchase everything. I’ll never fly again. Really a terrible day as I had planned to see a former student who is dying in Louisville Never ever will I forget that day. Your airline is totally uncaring.

Horrible, first flight delayed. They switched my connecting flight while I was en route and even though I was originally supposed to be on the flight going back home to boston, refused to let me board and told me I would have to wait for next flight that was 14 hours later. Ended up renting a car and driving 6.5 hours back home. Still getting messages about flight and it is now showing that the other flight they put me on is now canceled and I would have to wait 24 hours for the next one. I will never book with spirit again

Hated it I would not use Kayak or Spirit ever again.

They stuck us with multiple extra fees. I will never fly spirit again

Arrived 3 hours early and never made it past baggage drop

Flight delayed then canceled! I will NEVER fly Spirit Airlines again and will tell all my friends!

Absolutely terrible. The boarding process had zero organization. Mobs of people trying to board. People were climbing over my child's stroller with her in it. No families were boarded first. Boarding was delayed with no reasoning or notification that it would be late. We were then stuck on the plane for 45 minutes after landing. Then waited over two hours for our luggage. There was zero communication with the travelers. Never have I experienced such I professionalism and disgrace of others. Extremely disappointed.

For it to have left on time! Instead of two hours early with zero notice

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.

I checked a bag because it was $5 less than carry on. They managed to lose my bag on a 2.5 hr direct flight! Frontier has no airport staff at baggage claim to help. As soon as I got home around 11 pm I tried to use their online system to file the claim for lost bag - system wouldn't take the # on my baggage claim ticket - said it was not the correct number. Also said that I had not checked a bag, which wasn't true - even my online boarding pass showed that I had checked a bag. Wasted about an hour on that process with no luck. Tried again in the morning - same thing. So tried online chat with Frontier bot - waited 35-40" twice to be connected to a baggage agent and it never happened. Eventually drove to PDX after work and waited 2 hrs for the Frontier ticket agents to arrive prior to the next Frontier flight out of PDX and FINALLY got some help from one of them, to take me to lost luggage area where I was able to retrive my bag. Probably took 4-5 hrs. of my time and endless frustration to get my bag. This was my first -- and LAST -- experience flying Frontier Airlines. Check-in was also extremely difficult and time consuming. The flight itself (and staff) were fine but everything else about the experience was a total disaster! The fact that Frontier literally has NO WAY to connect to a human voice for customer service (in this case for lost luggage) is the WORST!!!!!

Frontier is a crappy airline nothing about it is honest

I didn't get to do this flight l, hard to review

Not good 😐 Over priced baggage fees Small hard seats No wifi or entertainment options 😕

Didn't like anything!! Horrible flight. Small seating area and hard seats. Butt was sore after 2 hour flight to Seattle No entertainment or free refreshments No wifi or USB charging receptacles to charge phone entoute like other airliners Luggage rates were 3 times as much as competitors. Difficult to navigate online luggue process to pre pay before flight Overall bad experience WILL NEVER RIDE OR RECOMMEND FRONTIER TO FRIENDS OR FAMILY MEMBERS!!! THIS IS A SHAME!! MOST MESERIBLE FLIGHT OF MY LIFE!! AND I THOUGHT SPIRIT WAS 👎 YOU GOT THEM BEAD HANDS DOWN!!

Flight was a little late taking off. Seats are too upright, no ports to charge devices, no wifi, no entertainment

Six hour delay. Poor customer service. No voucher. Bad communication. Missed important appointments.

Our flight was delayed an hour, then when we got to board our flight finally, we were waiting in our seats for take off for 45 minutes before it was communicated that there was a maintenance issue therefore we waited on the plane for over an hour while that was resolved. We did not get to Phoenix until almost 3 hours after we were originally supposed to. This was the first and last time I will be flying Frontier.

Book cheap flights from St. Louis to San Juan

Recent one-way flight deals

 
Only flying one-way? Below are some of the best one-way flight deals from St. Louis to San Juan found on KAYAK in the last 72 hours.
8/20Tue
1 stopSpirit Airlines
7h 37mSTL-SJU
$58
5/21Tue
1 stopSpirit Airlines
7h 37mSTL-SJU
$104
8/19Mon
1 stopFrontier
12h 45mSTL-SJU
$109
6/15Sat
2 stopsFrontier
17h 49mSTL-SJU
$117
11/9Sat
2 stopsAmerican Airlines
10h 40mSTL-SJU
$157
8/20Tue
2 stopsAmerican Airlines
10h 10mSTL-SJU
$160
6/21Fri
2 stops
22h 35mSTL-SJU
$214
6/21Fri
3 stops
39h 00mSTL-SJU
$238
8/20Tue
3 stopsUnited Airlines
19h 27mSTL-SJU
$319
11/9Sat
3 stopsUnited Airlines
19h 03mSTL-SJU
$323

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Last minute flights from St. Louis to San Juan

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 San Juan that are departing in the next 10 days.
5/18Sat
multi-stopFrontier
7h 44mSTL-SJU
5/20Mon
multi-stopFrontier
14h 05mSJU-STL
$328
5/17Fri
multi-stopFrontier
14h 03mSTL-SJU
5/19Sun
multi-stopFrontier
27h 27mSJU-STL
$342
5/16Thu
multi-stopFrontier
17h 11mSTL-SJU
5/20Mon
multi-stopFrontier
14h 05mSJU-STL
$357
5/18Sat
multi-stop
28h 46mSTL-SJU
5/20Mon
multi-stop
14h 38mSJU-STL
$386
5/16Thu
multi-stopFrontier
14h 43mSTL-SJU
5/18Sat
multi-stopFrontier
9h 50mSJU-STL
$413
5/18Sat
multi-stop
35h 29mSTL-SJU
5/20Mon
multi-stop
14h 38mSJU-STL
$436
5/17Fri
multi-stopAmerican Airlines
11h 01mSTL-SJU
5/18Sat
multi-stopAmerican Airlines
10h 52mSJU-STL
$673
5/16Thu
multi-stopAmerican Airlines
8h 10mSTL-SJU
5/20Mon
multi-stopAmerican Airlines
10h 24mSJU-STL
$688
5/16Thu
multi-stopUnited Airlines
8h 23mSTL-SJU
5/17Fri
multi-stopUnited Airlines
10h 12mSJU-STL
$781
5/18Sat
multi-stopUnited Airlines
11h 47mSTL-SJU
5/19Sun
multi-stopUnited Airlines
10h 54mSJU-STL
$1,080

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St. Louis - San Juan Flights

Departure:

St. Louis (undefined)United States

Destination:

San Juan (SJU)Puerto Rico

Return flight deals:

San Juan - St. Louis

Cabin classes: