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STL - SJU

$84 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
qua 7/10
qua 7/17

Search hundreds of travel sites at once for deals on flights 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.
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 42,898,604 times on KAYAK, and here is why:

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

Here are some of the best deals found on KAYAK recently from the most popular airlines for round-trip flights from St. Louis to San Juan that are departing in the next months. While these flights were available on KAYAK in the last 72 hours, prices and availability are subject to change and deals may expire.
Discover the best prices and deals for you by selecting your travel dates.
Choose your dates
7:44 pm - 1:59 amSTL-SJU
29h 15m1 stop
10:15 pm - 7:07 amSJU-STL
9h 52m1 stop
$141Frontier
Find Deal
sex, jun 21 - seg, jun 24
8:12 am - 2:08 amSTL-SJU
16h 56m1 stop
4:40 am - 7:22 amSJU-STL
27h 42m1 stop
$202Spirit Airlines
Find Deal
ter, ago 20 - ter, ago 27
8:12 am - 2:08 amSTL-SJU
16h 56m1 stop
7:39 pm - 4:20 pmSJU-STL
21h 41m1 stop
$211Spirit Airlines
Find Deal
dom, set 1 - sáb, set 7
8:10 am - 2:08 amSTL-SJU
16h 58m1 stop
1:45 am - 7:07 amSJU-STL
6h 22m1 stop
$214Spirit Airlines
Find Deal
dom, set 1 - qua, set 4
11:47 am - 12:20 amSTL-SJU
11h 33m1 stop
7:39 pm - 4:20 pmSJU-STL
21h 41m1 stop
sáb, ago 31 - qua, set 4
6:19 pm - 11:44 amSTL-SJU
16h 25m1 stop
3:03 am - 8:43 amSJU-STL
6h 40m1 stop
qui, jul 11 - qua, jul 17
12:43 pm - 10:07 pmSTL-SJU
8h 24m1 stop
5:55 pm - 11:39 pmSJU-STL
6h 44m1 stop
$314Delta
Find Deal
qua, ago 28 - ter, set 3
6:00 am - 4:40 pmSTL-SJU
9h 40m2 stops
6:30 am - 5:07 pmSJU-STL
11h 37m2 stops
$344American Airlines
Find Deal
qua, ago 28 - ter, set 3
11:51 am - 10:03 pmSTL-SJU
9h 12m1 stop
5:07 pm - 11:35 pmSJU-STL
7h 28m1 stop
$399Delta
Find Deal
sex, out 25 - sáb, nov 2
11:05 am - 9:26 pmSTL-SJU
8h 21m1 stop
2:05 am - 12:15 pmSJU-STL
12h 10m2 stops
$404United Airlines
Find Deal
sáb, dez 7 - qua, dez 11

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 September, where tickets cost $341 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 ($84) and Frontier ($129). The cheapest round-trip tickets were found on Frontier ($141) and Spirit Airlines ($202).

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

There is a maximum of 1 nonstop flight a day that takes off from St. Louis and lands 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 1 flights.

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

Early birds can take the earliest flight from St. Louis at 9:35 am and will be landing in San Juan Luis Munoz Marin Intl Airport at 3:05 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

November

High season

March

Cheapest flight

$84
Best time to beat the crowds but there is an average 20% increase 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 $84 for a one-way ticket and $141 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 $456 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 $648 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 10295 reviews
8.2Boarding
8.0Entertainment
8.6Crew
7.9Comfort
7.4Food
Airline reviews

3 hours late and all they have is was a $12 meal voucher. That’s not even enough to cover fast food.

2.0 MediocreCraig, Jun 2024CVG - LGA
Read more about Delta reviews

3 hours late and all they have is was a $12 meal voucher. That’s not even enough to cover fast food.

Among the poorest flights I’ve had with Delta in a while. Entertainment system failed completely on a 7.5 hr flight. Crew seemed distracted and not the normal friendly crew. Flight overbooked it seemed… very crowded.

If I can, I always fly Delta. I’ve found their service to always be reliable and pleasant.

You could have not cancelled the flight (AA, which I will be flying from now on) left for BOS despite the fictitious weather issues (that no one in my Boston family could see). You could have rebooked my direct flight to another direct flight instead of sending me though JFK, the worst US airport after O’Hara You could have rebooked me on a Main Cabin seat (like the one I paid for in my original ticket instead of putting me a the last row on JFK->BOS leg, pocketing the difference in ticket price But I do not really care whether you will ever do that in a future because in a future neither I nor anyone from my company (unless they pay out of pocket) nor an of my clients and partners (if they heed my advice) will ever be caught dead on any of Delta flights

Really bad baggage handling. Had my Rimowa bag badly damaged at the latches.

It was pretty good I was worried with the short Layover that I might not catch my connection but the gate was there

It was good until there was a 3 hour delay because there was not any pilots to fly the plane.

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.

Friendly flight attendants. Comfort plus seats were very comfortable and had lots of leg room. 10A and 10 B.

I've flown many many times on Northwest and then Delta. The crew on this flight were absolutely the best I've had the pleasure of being looked after by.

Why does it have to be painful to fly long distances?

It is a modern tragedy that any airline expects you to travel for 14 hours in such discomfort and that the only way to add comfort is exorbitant prices. I was in pain by the time we landed. Shameful.

Original plane sidelined. Had to wait an hour for replacement.

Crew was very cooperative and professional. Passenger's first checked in bag should be free.

No real agent onsite helping you for missing luggage there. Not like the other airline next to UA desk, they have staff attending in their desk assisting answer/helping luggage issue, even after midnight.

Horrible, the flights kept delaying, so it is obvious that we won't be able to make it to the next connection. No easier/real agent on site to help you figure this out. UA agent on other counters refuse to assist you and direct us to use the QR code/call customer service. So inefficient and poor. While technology seems convenient, but it's not the best interest/experience for customers need help while there is active issue need assistance.

Food is very bad and entertint not too many options ... flight attendet service is not good

After the morning frenzy of 35 min wait through CLT security at 4;30 AM, it was nice to have a smooth pleasant boarding experience. This 6:30 AM flight was not full. We were able to get seated swiftly and took off promptly. Nice touch they distributed the old fashioned headsets with 8 mm jacks. Snacks were decent and arrival was uneventful.

My window shade didn’t work. So I missed coming into my city. ☹️

Flight was delayed in the gate by 5 hours and ultimately cancelled- rebooking service by United agents was terrible

Paid for premium economy had no tv the whole time the crew tried to reset/reboot but would not work they said they would put a trouble ticket in for it. We had 3 seats my tv was the only one that didn't work. They cancelled our flight re worked us on another that left us at airport over night on the floor I have a ten year old and a 78 diabetic mother which also had shingles and suffers from nerve pain in legs and back. Requested wheelchair service at all airports after the re route NO wheelchair service was there to help. WORST experience we have ever had. Went to American airlines assistance it was closed. I AM FURIOUS!!! I expect some sort of compensation from this traumatic experience and no need for flying points we don't plan on using American airlines again!!!!

This is by far the worst experience I have had with American Airlines. The start of this trip was a complete disaster. I purposely planned my trip so that I would weather any delays so that I could make very important meeting at the Pentagon. My flight was cancelled because of maintenance and I was put on the first flight the next day but I was late to the meeting. After a long week at the Pentagon I just wanted to go home and my flight home which was early in the day was delayed. Eventually the flight was delayed until the next day. I was not authorized a hotel room because DCA was my point of origin. So I paid for a hotel out of pocket. The flight this morning was boarded then deplaned because the aircraft was hot. The flow of information was not happening in DCA and made it worse when the news was bad. I am going to take a break from American for my next few military flights. Hopefully whatever has been going on with American Airlines will be resolved.

We had a 2 hour delay. The seats were smaller than most other airlines. The person in front of us wanted to lay back and we had to stop her because she was pressing against my girlfriend’s legs. We had to ask her to sit up and not lay back due to the lack of room.

Information when booking said the flight would be with American Airlines but the flight was actualy with British Airways. Check in from Orlando was nice and quick. I agreed to put my cabin case in the checked luggage as it was a full flight. Case came back damaged (unable to put the handle down) so will have to dispose of it. Seats were quite cramped with very little leg room, even for economy. This was the experience of both the outgoing and return flight. Cabin crew were ok and flight time was punctual.

Everything was fine once we actually got on our flight. It was more then annoying they canceled (delayed) our flight. We lost out on a day of our trip along with money on our stay. Plus we had to book another hotel. So expensive.

This flight was canceled and delayed several times without explanation. The plane was freezing cold and no wifi for messaging. Getting off the plane was terribly unorganized and felt like it took forever….

The flight was delayed several times without explanation. The seats were terribly uncomfortable and wifi isn’t included. All these make for a less than ideal flight.

The flights was delayed by hours and it was the firmest landing I have experienced in my life. My back is still sore.

Internet service was erratic. Crew service was poor and slow. My luggage on this non-stop flight was lost and not recovered

Terrible. I didn’t fly and I had an important meeting the next day.

Flight was canceled less than 6 hours before takeoff, rebooked on a flight that was twice as long and left earlier so we couldn’t make it, when using text support option took over 2 hours to speak with someone.

Not enough help at airport during boarding process. Flight was delayed. Overall WORST flying experience I’ve ever had. Will NEVER FLT SPIRIT AGAIN

Terrible legroom, seats do not recline, tray table the size of an iPhone, delayed flight, have to pay 5$ to get a cup of water onboard.

Could have TV/Movie and some water ou soda free

Flight was good and clean but delayed over an hour on the return flight.

The non stop flight and able to go into Atlantic City airport. They could lower the prices. It starts out low but then if you want to bring luggage and pick your seat the price goes up quite a bit.

Flight got diwngraded last minute and left us stranded. I was told I’ll be given credit for my luggage and seat upgrades but haven’t got anything yet

We can’t predict circumstances like this ahead of time, but I give your staff a hats off for immediately giving us updated informations.

It was nice! There was a very unhappy child in front of us and the flight attendant did a great job calming the child. I was impressed.

The plane was not on time for boarding or departure or arrivals.

I strongly dislike Frontier. I find them barebones, the seats not particularly comfortable, the nickel and diming is maddening, the app is TERRIBLE - super confusing to navigate, and the last 4 frontier flights I have flown have been on AVERAGE 2 hours late, one ruining a fancy night out in Vegas with reservations made well in advance, which was nodded to with a measly 5000 miles, which translates to almost nothing. At least credit a free checked bag or something.

8 hr delay. had to buy another ticket with another airline

Four and a half hour delay in total. What frustrates me most is the poor communication and disorganization.

I appreciated the upgrade to free cary-on bag and seat selection at no charge

FRONTIER SUCKS! The agent downstairs tricked me into booking, just to get to the gate. At the gate, they told me they couldn't help. I then called Customer Service. They and the gate attendants kept blaming each other. Neither side was willing to help the customer.

The agent at check-in was strident, unwelcoming, and condescending to customers ahead of me.

Flight was delay 9hrs and nothing was provided at airport, had to go and get a room to sleep in, paid for Uber back and fort with no offers until we landed back home a 1hr later for a $75 voucher for a future flight.

Didn't like anything..entire crew was very rude to everyone on the flight. Plane old and the trays fall down on you the while time you're flying. Charged more for a carry on bag than for the plane ticket itself. Did make it from point a to point b, but worth the extra money to fly with another airline

9 hours of delay!! Was not able to check my luggage that I paid for!!!

It was delayed 9 hours for operational reasons, despite the plane arriving to the airport on time.

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.
8/20ter
1 stopSpirit Airlines
16h 58mSTL-SJU
$84
7/30ter
1 stopSpirit Airlines
8h 04mSTL-SJU
$90
6/22sáb
1 stopFrontier
11h 28mSTL-SJU
$129
8/19seg
3 stops
25h 23mSTL-SJU
$153
7/30ter
2 stopsFrontier
22h 06mSTL-SJU
$154
8/19seg
2 stopsAmerican Airlines
9h 33mSTL-SJU
$160
8/24sáb
3 stops
25h 23mSTL-SJU
$177
8/24sáb
2 stopsAmerican Airlines
10h 40mSTL-SJU
$191
8/20ter
3 stopsUnited Airlines
19h 27mSTL-SJU
$299
8/20ter
3 stopsUnited Airlines
19h 27mSTL-SJU
$319

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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.
6/13qui
multi-stopFrontier
24h 19mSTL-SJU
6/15sáb
multi-stopFrontier
9h 52mSJU-STL
$316
6/13qui
multi-stopFrontier
24h 19mSTL-SJU
6/15sáb
multi-stopFrontier
9h 52mSJU-STL
$317
6/13qui
multi-stopFrontier
24h 19mSTL-SJU
6/14sex
multi-stopFrontier
28h 59mSJU-STL
$322
6/13qui
multi-stopFrontier
24h 19mSTL-SJU
6/14sex
multi-stopFrontier
28h 59mSJU-STL
$323
6/13qui
multi-stop
25h 48mSTL-SJU
6/15sáb
multi-stop
22h 59mSJU-STL
$416
6/13qui
multi-stop
34h 21mSTL-SJU
6/15sáb
multi-stop
22h 59mSJU-STL
$445
6/13qui
multi-stopSpirit Airlines
14h 05mSTL-SJU
6/14sex
multi-stopSpirit Airlines
21h 48mSJU-STL
$550
6/12qua
multi-stopAmerican Airlines
10h 47mSTL-SJU
6/14sex
multi-stopAmerican Airlines
9h 04mSJU-STL
$614
6/12qua
multi-stopUnited Airlines
14h 52mSTL-SJU
6/13qui
multi-stopUnited Airlines
15h 36mSJU-STL
$704
6/13qui
multi-stopUnited Airlines
10h 43mSTL-SJU
6/13qui
multi-stopUnited Airlines
15h 36mSJU-STL
$768

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St. Louis - San Juan Flights

Departure:

St. Louis (STL)United States

Destination:

San Juan (SJU)Puerto Rico

Return flight deals:

San Juan - St. Louis

Cabin classes: