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Find cheap flights from St. Louis to Puerto Rico from $73

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 Puerto Rico 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
Thu 6/27
Thu 7/4

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Best Puerto Rico Flight Deals

Cheapest round-trip prices found by our users on KAYAK in the last 72 hours

Aguadilla
Aguadilla1 stop$344

Good to know

Low season

November

High season

March

Cheapest flight

$73
Best time to beat the crowds with an average 7% drop in price.
Most popular time to fly and prices are also 3% lower on average.
Flight from St. Louis to San Juan

FAQs - booking Puerto Rico flights

  • From St. Louis, can I fly to the South Coast of Puerto Rico?

    Yes. You can book a flight through KAYAK from STL to the city Ponce, which is located on the southern coast of Puerto Rico. You will be landing at the Mercedita International Airport (PSE). Spirit is one carrier that offers a flight from STL to PSE with one stop, usually in Orlando. Airlines such as Spirit, Cape Air, and JetBlue offer flights from STL to PSE with two stops. Layover cities often include Orlando, Baltimore, Nashville, and other cities.

  • Where can I go in Puerto Rico for a remote tropical vacation?

    You can fly from St. Louis to the Isla Day Culebra, a small island that is part of Puerto Rico but located to the east of the main island. When you fly to this small island, you will be landing at the Aeropuerto Benjamín Rivera Noriega (CPX). Frontier, Spirit, Cape Air, Silver Airways, and United are among the airlines that offer two- or three-stop flights from STL to CPX. Layover destinations include Washington DC, Dallas, Orlando, and others.

  • What is the San Juan Airport like?

    The San Juan Airport on the northern coast of Puerto Rico is the busiest airport in the Caribbean. This four-terminal airport includes a hotel at the airport, exclusive lounges you can access by paying at the door, shops and restaurants that usually close at night, a currency exchange, public transportation, rental cars, and more.

  • Does STL have private facilities for nursing mothers?

    Yes. STL offers lactation suites throughout the airport at Gates A10, C9, and E33. Each lactation suite is a clean, calm, quiet space where a nursing mom can breastfeed in private or where she can go to pump. Each suite features comfortable seating, a table, an ottoman, a bench, a sink, and an electrical outlet.

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

    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 Puerto Rico.

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

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

    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 Puerto Rico with an airline and back to St. Louis with another airline.

  • What is KAYAK's "flexible dates" feature and why should I care when looking for a flight from St. Louis to Puerto Rico?

    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 Puerto Rico 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

Top tips for finding cheap flights to Puerto Rico

  • Morning departure is around 27% more expensive than an evening flight, on average*.
  • The St. Louis Lambert International Airport (STL) is a hub for Air Choice One and Cape Air. When you book your flight through KAYAK for St. Louis to Puerto Rico, you will have many options of destination, airline, flight time, and price.
  • When you fly from STL to San Juan, the capital of Puerto Rico, you'll be landing on the northeast of the island at the Luis Muñoz Marín International Airport (SJU). Airlines such as Spirit, Frontier, Delta, and United are among the carriers that offer one-stop flights from STL to SJU. Common layover cities include Atlanta, Orlando, and Charlotte. United and American are among the airlines that offer flights from STL to SJU with two stops.
  • If you're flying from STL to Aguadilla, the beach town in the northwest of Puerto Rico, you'll be landing at Rafael Hernández Marín International Airport (BQN). Frontier and Spirit are among the airlines that offer one- and two-stop flights from STL to BQN, with layovers in cities such as Orlando, Tampa, Las Vegas, and Fort Lauderdale.
  • As you wait for your flight to Puerto Rico at the St. Louis International Airport, you can enjoy the live music of a piano player in the terminal. STL decided to have the piano player as part of an arts and culture initiative at the airport, a program designed to delight travelers and enhance their experience.
  • The St. Louis Airport has two interfaith chapels that welcome all. These quiet spaces are meant for reflection, meditation, prayer, or simply for relaxation. These chapels are open 24/7. One chapel is located on the lower level of Terminal 1 and the other is near Gate E40.
See more tips
*Average of the lowest prices shown in KAYAK’s search results for departures within the next 30 days

Top 5 airlines serving from St. Louis to Puerto Rico

 
Need help choosing which airline to fly with from St. Louis to Puerto Rico? 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 10502 reviews
7.4Food
8.0Entertainment
8.2Boarding
7.9Comfort
8.6Crew
Airline reviews

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.

10.0 ExcellentAnonymous, May 2024MSP - YVR
Read more about Delta reviews

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.

Flew first class so everything was great. But maybe because the flights were red eye, no meals were served, just chips. I flew Alaska Air 1st class at 9PM (2 hour flight) and they served beef short rib sliders!

Had to change aircraft due to a faulty door. Surprisingly it only caused about an hour and a half of delay. Delta handled this situation as well as can be expected.

Awful. Flight was continuously getting delayed and gates kept changing without any reason. Flight was delayed for more then 3 hours

Paid premium for Delta only to be on safe but tired old 767 with ancient cabin in mediocre condition. Poor wifi and horrible inflight entertainment. Hardly a premium experience. Should have flown SW and had fun flight crew and no pretense

Our flight to Zurich was delayed by almost 3 hours, so we missed our next flight. There was no indication it would be delayed this much. We were told the gate had changed and then it apparently took over 2 hours to load the "catering" on the plane. We were not compensated in any way for the trouble.

Rated entertainment as Mediocre as there were major problems with the Infotainment system that took probably a half hour for them to fix.

Your crew could maybe answer the call bell at least one of the times I pressed it. I pressed it first time with 2.5 hours left in our flight bc my partner was hungry and wanted a sandwich. We finally got the sandwich with 40 mins left in the flight.

Half the bathrooms assigned to economy were out of action

Delta crushed it. Flight attendant in first was attentive and just never stopped. Honestly one of the best domestic flights I’ve been on.

We liked the fully reclinable seats. Had center seats, so it was difficult to talk to spouse. Crew was great

Aisle chair was good and liked the foot bar preventing you from putting your foot in the isle, The breakfast on this international flight to Zurich was horrible (Europeans, specially, used to good food) may make this a dealbreaker for booking with United Airlines again. I agreed with my Spanish fellow passenger.

Dinner was okay but the breakfast was not eatable on the flight San Francisco to Zurich.

There was no screens on board AND the WiFi didn’t work. My seat was broken and couldn’t recline so I couldn’t even sleep. The flight attendants didn’t offer anything to make it more comfortable. It was such an old cramped plane, when the person in front of me reclined I couldn’t even open my tray table. All the United ads talk about guaranteeing everyone gets a screen!

The Wi-Fi was unavailable on this flight for some reason.

The flight was delayed almost 2 hours. Bad customer service etc. I will never fly Luthansa. Ever!!!

On time take off…US cabins look tired and need of refresh!

Fine. Though no food or entertainment so the survey needs to be updated with those options.

Backpack should NOT allowed put in the flight bin , only put it under the seat. I can't find space put my carry on luggage!!! and I pay for it ! that was very bad experience

Fantastic. Smooth boarding with an infant. Never experienced it with any other carriers.

The boarding process and flight were great. However, I waited about 40 minutes for my luggage. It did not come up on the designated belt. Instead, everyone’s bags were on a cart. Not sure what the issue was, but we were not informed until another passenger went looking for her bags and found them.

There were delays on both ends. It made it less than excellent. This plane was great though

AA1537 the AC was not working properly. It was very hot and uncomfortable.

So uncomfortable to sit in the tiny space on a long, international. Food was rough. Please, less white flour and processed food.

Worst experience flying American Airlines. I fly with them often, so I was super disappointed in the service I received at gate 30 in LGA on May 24, mid-day. The flight was delayed twice. I was patiently waiting in the American Airlines lounge when I received the notice on my app that the plane was boarding 45 minutes before its newly re-scheduled take off of 4 pm (from the orginal 1:45 pm then 3:00 pm). It took me 5 min to travel from the lounge to the gate and when I arrived there at 3:20 flight gate attendant told me the flight had closed and that they announced for passengers multiple times. I showed them the notification on my app and they were really rude and unempathetic. The person who rescheduled my flight at customer service wasn't any happier but was at least helpful in getting me on the next flight.

Flight was 1/2 hour delayed leaving Phoenix. Otherwise it was an average flight. Flight crew on this trip was very nice.

Our flight was delayed 2.5 hrs due to plane being too hot! After 1.5 hrs, airline decided to use another plane but had to wait for gate, baggage transfer & beverage transfer. Anyone could tell after first half hour that another plane was required and although did not affect us many would miss connecting flights at Heathrow. I have found the stewards are not the friendliest in the industry and the food is questionable, even as I like airplane food normally, the best of the 2 flights was the yogurt & granola for breakfast.

Everything was great except for the wifi was junk. Crew was super friendly and helpful

Was lucky to have a employee at the AA checkin counter that had compassion and understood they ordeal that we went through with our original flight being diverted, needing to stay in the aircraft and then flying to the original destination; adding hours to the trip and forcing us to miss our connection and our rebooked connection. She was able to get up on standby on the highest priority on the next flight to the closest airport we need to be at and it all worked out despite being many hours late.

Delayed so that missed connecting flight. Connecting flight was also delayed on the tarmac but they closed the gate before the rescheduled time.

No food not even water offered unless you buy it and no usb in the seat but other than that everything was good

Because our flight from marsh Harbor to Fort Lauderdale was over three hours delayed it caused us to miss our flight in Fort Lauderdale. Because we missed that flight, it cost us nearly $100 apiece for four different travelers which totaled nearly $400. We are seeking a reimbursement for the flight that we missed in Fort Lauderdale Florida.

Flight expected to leave at 6:40 pm ended leaving at 8:00 am the following day. I slept in a cold airport. Never again Spirit for me…

Flight was cancelled just 6 days before. No more flights that day, and the following date was sold out. Had to obtain a refund and buy more expensive flights on another airline.

The flight was on time and nice as always for me with spirit but the cabin crew were not good. They left the lights on on a red eye for the entire flight.

This was the return leg of my journey with Spirit Airlines. Despite its reputation, I found no issues as it got me from point A to B safely and without delay, especially with no mechanical delays, which is fantastic in my book! The staff, from ground crew to cabin crew, were all pleasant and hassle-free. The flight was smooth from takeoff to landing. I have absolutely no complaints about this no-frills airline!

I got a one-way, last-minute nonstop flight from PDX to BWI for only $125. Yes, I got nicked $79 more for a checked suitcase and $89 more for the BIG SEAT option, but it was worth it, even with $4.50 for coffee and $10 for a snack (the latter no different than any other airline). The grand total was still less flying on any other airline.

It was the worst ever, i will be filing a lawsuit to get a refund. Our flight was delayed 4 hours so we would miss our connecting flight, we were not rebooked to our destination the same day, we were not offered any options to get home on the same day despite being clear that we absolutely cannot get stranded at night due to family, we were forced to book our own flights on a different airline to get home, and spririt is refusing a refund because our flight wasn't cancelled, only delayed. oh yeah, and they lost our luggage on the first part of the trip and you cannot get a hold of customer service when anything goes wrong, on hold for 30+ minutes. and their app breaks so you can't use that either.

This recognisable no-frills airline gets me from point-A to point-B. I was able to get to Chicago without stress. The checked baggage collection and reclaim could be improved.

The crew was the best and very accommodating I know you don't offer any complimentary items but water and coffee will not break the bank !!

It was ridiculously hard to check in for the flight, and Frontier charged us a LOT of money to have a carry on suitcase, and then told everyone we could not carry on bags and had to check them through at the gate, and didn't refund the extra money we paid to have the suitcase as carry on.

I had a terrible experience with Frontier. I arrived before the 60 minute cut off and was told that Frontier has a two hour window for bags. I was then told the next available flight wasn’t until the end of the day (I had booked a 6am flight). I took a look around and saw other people being told that they could not board their flights or that they had to pay additional fees. I opted to rebook on American Airlines. There’s absolutely no straightforward way to contact Frontier, so this ticket was a complete waste of money. Oh - and the kicker is that the lady lied about the two hour cut off.

Frontier won’t help you at the airport without paying $25. Carry on was $75. Then you get on the plain and every beverage or snack is also a charge. Seats are hard and real packed in. I would never fly them again.

Worst experience I have seen. The flight was cancelled without any reason.

My experience with frontier staff at the Denver airport was absolutely horrible. The manager on duty was even worst if was the worst experience I have ever had, I have never been treated so poorly as a customer in my life! The staff was extremely rude, eye rolls and attitude and then refusal to help me at all. I wish I could never fly frontier again that’s how horrible it was!

The Frontier app wasn’t working. So I could not pay for a carry on the week prior to flying. They charged me 99$ at the gate to carry on a duffle bag.

Good for the price. My only complaint is that the pilot should keep the air flowing while passengers are waiting to getting out of airplane.

Plane could have been more on time. More leg room .

I arrived 1 hour prior to boarding, and they said I was too late for a domestic flight. First time I heard that :-(

Check in online was easy. Seats aren’t very comfortable

Book cheap flights from St. Louis to Puerto Rico

Recent round-trip flight deals

6/23Sun
1 stopSpirit Airlines
17h 08mSTL-SJU
6/29Sat
1 stopSpirit Airlines
21h 26mSJU-STL
$257
8/7Wed
1 stop
29h 31mSTL-SJU
8/14Wed
1 stop
7h 21mSJU-STL
$267
7/6Sat
1 stopSpirit Airlines
16h 08mSTL-SJU
7/12Fri
1 stopSpirit Airlines
22h 35mSJU-STL
$269
6/25Tue
1 stopSpirit Airlines
19h 18mSTL-SJU
6/29Sat
1 stopSpirit Airlines
21h 26mSJU-STL
$272
7/14Sun
1 stopSpirit Airlines
16h 22mSTL-SJU
7/22Mon
1 stopSpirit Airlines
14h 08mSJU-STL
$275
8/3Sat
2 stopsFrontier
17h 53mSTL-SJU
8/8Thu
2 stopsFrontier
18h 14mSJU-STL
$280
6/8Sat
1 stopFrontier
11h 28mSTL-SJU
6/15Sat
1 stopFrontier
9h 52mSJU-STL
$286
8/14Wed
2 stopsAmerican Airlines
8h 45mSTL-SJU
8/18Sun
1 stopAmerican Airlines
17h 21mSJU-STL
$396
8/6Tue
1 stopAmerican Airlines
10h 30mSTL-SJU
8/13Tue
2 stopsAmerican Airlines
11h 12mSJU-STL
$399
6/26Wed
1 stopUnited Airlines
8h 27mSTL-SJU
7/2Tue
2 stopsUnited Airlines
15h 35mSJU-STL
$602

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Recent one-way flight deals

8/20Tue
1 stopSpirit Airlines
7h 37mSTL-SJU
$73
8/20Tue
2 stopsSpirit Airlines
19h 53mSTL-SJU
$90
8/19Mon
1 stopFrontier
12h 45mSTL-SJU
$135
6/3Mon
1 stopFrontier
15h 46mSTL-SJU
$137
8/19Mon
3 stops
25h 11mSTL-SJU
$138
8/19Mon
2 stopsAmerican Airlines
10h 41mSTL-SJU
$161
6/22Sat
3 stops
22h 15mSTL-SJU
$196
8/20Tue
3 stopsUnited Airlines
19h 27mSTL-SJU
$274
6/3Mon
2 stopsAmerican Airlines
10h 36mSTL-SJU
$276
8/19Mon
3 stopsUnited Airlines
19h 25mSTL-SJU
$284

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Last minute flights from St. Louis to Puerto Rico

Last minute flight, train and bus deals

6/1Sat
multi-stopFrontier
14h 02mSTL-SJU
6/8Sat
multi-stopFrontier
23h 10mSJU-STL
$303
6/1Sat
multi-stopFrontier
14h 02mSTL-SJU
6/8Sat
multi-stopFrontier
12h 02mSJU-STL
$342
6/2Sun
multi-stopSpirit Airlines
16h 13mSTL-SJU
6/8Sat
multi-stopSpirit Airlines
16h 25mSJU-STL
$367
6/2Sun
multi-stopSpirit Airlines
24h 49mSTL-SJU
6/8Sat
multi-stopSpirit Airlines
16h 25mSJU-STL
$369
6/2Sun
multi-stop
16h 13mSTL-SJU
6/9Sun
multi-stop
39h 30mSJU-STL
$400
6/2Sun
multi-stop
24h 49mSTL-SJU
6/9Sun
multi-stop
39h 30mSJU-STL
$403
5/31Fri
multi-stopAmerican Airlines
10h 10mSTL-SJU
6/2Sun
multi-stopAmerican Airlines
12h 24mSJU-STL
$614
5/30Thu
multi-stopUnited Airlines
10h 43mSTL-SJU
5/30Thu
multi-stopUnited Airlines
10h 52mSJU-STL
$1,128
5/30Thu
multi-stopAmerican Airlines
14h 56mSTL-SJU
5/31Fri
multi-stopAmerican Airlines
15h 30mSJU-STL
$1,133
5/30Thu
multi-stopUnited Airlines
11h 19mSTL-SJU
5/31Fri
multi-stopUnited Airlines
9h 14mSJU-STL
$1,134

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St. Louis - Puerto Rico Flights

Departure:

St. Louis (STL)United States

Return flight deals:

Puerto Rico - St. Louis

Cabin classes: