$181 Find Cheap Flights from St. Louis to Costa Rica

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 Costa Rica departing on 3/24. 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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Best Costa Rica Flight Deals from St. Louis

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

San José
San José1 stop$309
Liberia
Liberia1 stop$459

Cheap Flight Deals from St. Louis to Costa Rica (STL-CR0)

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

Recommended round-trip deals departing in the coming months from the most popular airlines that fly from St. Louis to Costa Rica.
Discover the best prices and deals for you by selecting your travel dates.
Choose your dates
6:47 pm - 11:21 amSTL-SJO
17h 34m1 stop
12:26 pm - 5:52 pmSJO-STL
28h 26m1 stop
$309Spirit Airlines
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Tue, Apr 1 - Mon, Apr 7
6:47 pm - 11:21 amSTL-SJO
17h 34m1 stop
12:50 am - 5:52 pmSJO-STL
16h 02m1 stop
$324Spirit Airlines
Find Deal
Tue, Apr 1 - Mon, Apr 7
6:10 pm - 11:50 pmSTL-SJO
6h 40m1 stop
12:55 am - 5:15 pmSJO-STL
15h 20m1 stop
$331Spirit Airlines
Find Deal
Tue, Apr 15 - Mon, Apr 21
11:06 am - 9:58 pmSTL-SJO
11h 52m1 stop
6:03 am - 10:19 pmSJO-STL
15h 16m1 stop
$395American Airlines
Find Deal
Sat, May 3 - Thu, May 8
7:19 am - 6:24 pmSTL-SJO
12h 05m2 stops
6:03 am - 5:29 pmSJO-STL
10h 26m1 stop
$399American Airlines
Find Deal
Sat, May 3 - Thu, May 8
5:27 pm - 10:11 amSTL-SJO
17h 44m2 stops
5:30 am - 8:49 pmSJO-STL
14h 19m1 stop
$517United Airlines
Find Deal
Fri, Jun 6 - Mon, Jun 16
5:33 pm - 7:39 pmSTL-SJO
27h 06m2 stops
5:30 am - 2:23 pmSJO-STL
31h 53m2 stops
$526United Airlines
Find Deal
Mon, Mar 17 - Mon, Mar 24
6:25 am - 7:40 pmSTL-SJO
14h 15m2 stops
8:45 am - 8:55 pmSJO-STL
11h 10m2 stops
$879Southwest
Find Deal
Sun, Mar 23 - Fri, Mar 28
1:06 pm - 9:24 pmSTL-SJO
9h 18m1 stop
7:00 am - 3:24 pmSJO-STL
7h 24m1 stop
$1,119Delta
Find Deal
Mon, Mar 17 - Sat, Mar 22
6:10 am - 1:05 pmSTL-LIR
7h 55m1 stop
3:05 pm - 9:20 amLIR-STL
17h 15m2 stops
$1,138Southwest
Find Deal
Thu, Mar 27 - Sun, Mar 30

Good to know

Low season

October

High season

January

Cheapest flight

$181
Best time to beat the crowds with an average 8% drop in price.
Most popular time to fly and prices are also 7% lower on average.
Flight from St. Louis to San José

FAQs - booking Costa Rica flights

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

    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 Costa Rica.

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

    KAYAK’s flight Price Forecast tool uses historical data to determine whether the price for a flight from St. Louis to Costa Rica 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 Costa Rica?

    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 from St. Louis to Costa Rica with an airline and back with another airline.

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

    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 from St. Louis to Costa Rica 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 Costa Rica

  • Book at least 1 week before departure in order to get a below-average price.
  • High season is considered to be January, February and December. The cheapest month to fly from St. Louis is September.
  • Morning departure is around 16% cheaper than an evening flight, on average*.
*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 Costa Rica

Need help choosing which airline to fly with from St. Louis to Costa Rica? 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.
8.1
SouthwestOverall score based on 4330 reviews
8.7Crew
7.1Food
8.2Boarding
8.1Comfort
7.6Entertainment
Airline reviews

WiFi on the flight was not working. Thus, entertainment options were limited.

8.0 ExcellentJames, Feb 2025SRQ - DEN
Read more Southwest reviews

WiFi on the flight was not working. Thus, entertainment options were limited.

Great flight staff. Ease of boarding. Overall, very uneventful and easy trip.

Plane late from DC to Austin 30 minutes. Crew made up much of the time enroute to San Diego.

Gate agents were informative and friendly… flight attendants were as well. Had a fun time chatting about their legacy AirTran experiences as a former fan of the airline that Southwest acquired.

Flight was awfully bumpy and landing was a bit jolting. I was in the restroom when snacks and drinks were served and was not asked if i wanted any. I had to ask for water finally.

Wi Fi was horrible kept cutting out the whole time and too expensive

I really like open seating. I hate that I've heard this is going away. This is one of the unique things that makes Southwest my goto choice.

Boarding was a little late, but made up for it. It was quick to taxi to the runway, since it's a smallish airport.

Excellent! Only question is how we check in at exactly 24 hours in advance and end up at the end of the B boarding group

Multiple delays and gate changes. Arrived at final destination 6 hours late. All rental cars had been taken.

Delta is a premier airline so my expectations are most always met.

Seats are much much more comfortable than United, which is what I usually fly

Zero updates from the pilots for 30 minutes in the tarmac

Boarding is, as it always is… horrible. Gate lice. Slow moving zones. Too many people with carry ons

I loved having a most black flight crew during Black History Month; rather by design or accident I appreciated the representation. ❤️

This was the second flight this week with flight attendant Marcus I’m not sure if his last name is Lane or Lang but this guy is awesome. He funny, attentive and his service is 5 stars. Marcus makes business travel more enjoyable !

Although the flight left late, we arrived early. It was one of the quickest boarding and off boarding experiences I’ve had. It was kind of annoying the only drinks they had were water, coffee, and tea. The flight was very smooth, temperature was just right, and flight attendants were friendly.

Rode in a smaller plane and short trip meant no snacks, no free wifi or tv. It was only 30min flight so honestly wasn’t a big deal to lack these items.

Lower number on this flight so spaced out passengers. Able to enjoy more room to relax during flight. It was lovely.

Kind staff. Snacks are small but that’s the new normal.

Delays took 2hours and thirty minutes making me miss my connecting flight and make me sit in the Chicago airport for 9 hours

The flight was heavily booked so boarding was a lengthy process. The FA’s were rather abrupt during this process but became more gracious as the flight went on. Breakfast (puffed pastry and chewy sausage) was pretty horrible but there was fruit and yogurt which they didn’t mess up. Overall it was fine.

Had a short delay once we boarded the aircraft in Chicago, but it was fixed in no time flat then we were on our way. The pilot was able to make up the time lost and we landed 5 minute later then schedualed . Great service

All male crew was just too woke for me. I felt like a sardine. I will never take a window seat or the rearmost seat again. I booked early and did not pay for seat selection and that was a mistake. The security at IAH was atrocious. I was violated and radiated as I was in a hurry to connect to my other flight. I may have lost items under the seat in front of me that I couldn't see nor bend over to look.

Pilot Erika DeLong made us feel safe and at ease in a frankly scary time to be flying. Her warm smile and greeting and excellent command of the aircraft in foggy bumpy weather helped us all to calm our nerves and get us home safely.

I don’t understand the purpose of the orange “priority” tag on my bag. This tagged, my bag is last or near to the last bag to come down the carousel at IAH.

The tv monitor in front of my seat was not responding. The flight crew reset it and it still didn’t work.

The agents was very rude and they charged me $50 for a carry-on bag saying that it was too big and then I saw someone going on a plane with the same size bag as me

Liked nothing. As per previous segment it was delay delay delay.

Terrible. First of all we were delayed 4 3/4 hours departing Honolulu. As we had to leave our condo and the rental car had to be returned we had to go to the airport. Even though we had a business class boarding pass to Washington, since we did not have business class to Montreal we could not access the lounge without paying a $59 fee each. This does not make sense to us. Since we could not meet our original connection United booked us to Montreal via New York LaGuardia on Air Canada. In Washington a further delay got us into LaGuardia too late to make our connection to Montreal so we were booked on another Air Canada flight 3 hours later. We were originally scheduled to arrive in Montreal at 10:40 and arrived at 19:55. A totally exhausting day, United did not offer a meal voucher or any type of compensation. Air Canada did give us a digital meal voucher. The food in United business class is poor among all meals offered. The pods look nice but are not that confortable. Overall would not fly on United again.

I didn’t like anything, being platinum pro get you absolutely nowhere and does not increase the customer service treatment whatsoever anymore. My flight was canceled and they put me on a flight eight hours later that would’ve got me back in the middle of the night. They could’ve easily move me up to an hour Prior on an earlier flight. My second flight was unreasonable to take, the third flight was also canceled due to mechanical issues like the first flight. I don’t know what’s going on with American, but they are falling apart, after seven flight changes I finally got home, Unreasonable.

Awkward carry on process. Forced to check all carry on. No overhead space of worthiness. Left delayed, but made up the time. Crew was amicable.

Standard. No different than a discount carrier on a short trip.

At least it was a short flight. Greyhound with wings.

They have lost any customer service care and support. Terrible airline now and been for awhile.

April was the flight attendant in first class and was the most pleasant, cordial and efficient person I have seen on a flight in years. Good example of the type of people AA should hire to increase customer satisfacdtion.

Everything was great. Boarding, early departure, early arrival, and deplaning were smooth. Smooth flight.

Two flight changes before the scheduled flight. On the day of the flight, the flight was delayed, which caused the connecting flight to be missed. Then, I was directed to another airport (CUN) and traveled to Tulum. American gave a $12 voucher for lunch. The least expensive item on the menu at a Mexican restaurant was $9.99. Driving to Tulum was a bad auto crash, and traffic was delayed two-plus hours. The bottom line is that we should have been at the hotel at noon, but it ended up at 11:30 PM.

The flight was delayed leaving Miami. When we arrived in Charlotte, we were unable to park at our scheduled gate. We had to wait another 30-45 minutes before we could park at a different gate. All in all, we were delayed by almost two hours arriving in Charlotte.

Bigger seats. Board back to front! Disembark front to back!

Seats are uncomfortable and too close together. Also, you missed my connection in Vegas on the way back and I ended up sleeping in the airport, flying back to Burbank instead of LAX and I got home 12 hours late.

Surprising everything went well. Nice attendants and fast getting on and off the plane. Overall, was happy with the experience.

Friendly staff put me at ease with processes, since this was my first time. I would recommend flying on Spirit!

I lijed the friendliness of the crew and that we were on time.

There should be a “Ticketing/Check In” section. A Spirit employee helped us operate the self-serve check-in kiosk, and he was very helpful. However, the ticket agent was another story. She took our (2) checked bags, but when placing them on the conveyor, dropped one of them - it fell over on the conveyor and broke the retractable handle. Two pieces of the handle broke away and landed behind the counter. She knew what had happened, but chose to ignore and moved on to the next person in line.

Pl meed tp make proper accom for all pets and owners by placing them on a section to accommodate human animal allergies and give up a few seats YWS ACCOMMODATIONS SHOULD BE MADEBY THE AIRLINES and not pushed off to another paying customer that has to sit in fear or by being touched by someone elses animal.

hassled about bringing my laptop on in addition to my backpack...people boarding with real luggage were not stopped but I was which was ridiculous....zero comfort on board and everything is extra. Last time flying spirit not worth it

A passenger got into a verbal altercation with the flight attendant, who neither de-escalated nor acted professionally. Because of this, we had to go back to the gate for the person to be kicked off the flight. It delayed us 75 minutes.

Our experience was not a good one. Our flight got cancelled and was not given any accommodations due to the inconvenience. We lost time on our vacation due to this inconvenience

Helpful flight attendant. Awful legroom. Airline should be required by law to offer people a glass of water.

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