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Find cheap flights from St. Louis to Costa Rica from $106

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 6/8. 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
Sun 6/9
Sun 6/16

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Best Costa Rica Flight Deals

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

San José
San José1 stop$241
Liberia
Liberia1 stop$419

Good to know

Low season

October

High season

January

Cheapest flight

$106
Best time to beat the crowds with an average 18% drop in price.
Most popular time to fly and prices are also 18% 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 to Costa Rica 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 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 to Costa Rica 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 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 to Costa Rica 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 Costa Rica

  • Morning departure is around 9% more expensive 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.
8.0
DeltaOverall score based on 10768 reviews
8.6Crew
8.0Entertainment
7.9Comfort
7.4Food
8.2Boarding
Airline reviews

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.

4.0 OkayPatricia, May 2024DTW - CDG
Read more about Delta reviews

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.

Very frustrated with boarding gate crew. She announced the plane was small and they would be limiting us to one item to carry on. Not a problem for me as I understand the tiny planes have limited space!! Not the case here! It was a rather large plane and had plenty of room for bags! So because I don’t want to be one of “those people” who ignores the request to check a carry on I did so asking if I would be able to pick it up at the bottom of the ramp on arrival in Knoxville to which she responded “yes”! Then I watched as every other passenger held onto their 2 items and boarded!! Then when we arrived in Knoxville our 2 carry ons had been put with all the other luggage and we had to go to baggage pick up and wait for all the big checked bags to come off the carousel! So she lied!! Frustrating. Next time I won’t be so nice!

It was a good experience except when boarding a female flight attendant did not go out of her way to assist my teenage daughters in finding space for their carry-ons after their compartments were full.

On time departure, smooth trip, flight attendant told through passengers the gate we would arrive at and the gate our outbound flight was departing from. Early arrival

Checking in at the airport the agent only booked the first keg of my trip and had my checked luggage going to the airport with a layover! Never was issued a boarding pass for the second leg or received sticker fir my checked bag. All was well in the end! Delta agents helped to resolve the situation!!!

Delayed due to an ill passenger after loading. Not preventable on Delta's part. Was in first class. The seats are becoming worn and detaching from their velcro attachments. Only got snacks on flight. The attendant was not the friendliest.

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.

Should have video screens Plane audio was poor and without wired connection hard to understand crew. Should serve more than just cups of water and pretzels on six hour flight. Did not see crew rest of flight. Fix charging sockets to retain charging blocks.

I paid $380 for my one-way ticket from California to Minnesota. The fair did not include online check-in. I received instructions from their app to check in at a kiosk. At the kiosk, the boarding pass would not print until an actual person came to verify that I had a personal item and not a carry-on item, On the plane, the person next to me was drunk and allowed to continue to order alcohol. United is garbage I’d rather fly spirit.

The plane was dirty and the in seat air wasn't blowing as planes usually do.

Generally good but there wasn’t any staff available when my luggage didn’t appear at baggage claim in Fresno. It took about half an hour to locate a staff member to open up the locked room where it was being kept.

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!

Great crew. Very comfortable business seats with nice bedding. Good food. We were delayed to let late passengers on the flight, but otherwise great experience.

Great crew. We were delayed so that late passengers could get on the flight. Love the bedding in business class. Good food. Great experience.

The CX617 from HK to BKK was delayed more than 1.5 hours.

It took 66 hours to get from Seattle to Tel Aviv. As a minor, I was left for more than 12 hours in Toronto and Frankfurt without hotel and food vouchers. It took 5 layovers. It was insane and not okay

It was delayed but got us to YYZ. I had great copassengers.

Flew SEA-CA, then CA-NRT. First flight was short but very uncomfortable, dirty, and had very small overhead storage space. The seats and fans were not cleaned and had visible dirt on them. Second flight was perfect.

My second flight ended up being through United and it was fine. Again, just frustrating that it was so late.

My experience was pretty frustrating because the first leg of my flight on United (though booked through Air Canada) was delayed causing me to miss my connecting flight on Air Canada. This could have been an easy solve as there was a direct flight later that morning via Air Canada that they easily could have put me on which would have only gotten me to my destination 2 1/2 hours later but because United and Air Canada don’t seem to have good communication they gave me the run around both telling me to talk with the other which I did three times to no avail. I ended up taking the delayed flight and getting on a new connecting flight which ended up getting me to my destination 6 hours later and I missed the event I was planning to go to this evening.

Everything went smoothly and as expected. We were on time and one flight arrived early.

First time flying Air Canada and the trip was very pleasant! They did a great job getting us out of Toronto and into Rome (early!) For an international flight it was very enjoyable.

This is not a Business Class equipped airplane and even the crew apologize before take over BUT BUT Air Canada charged full business class fare

All was good, except our baggage was lost for most of a day. We are thankful that it was found quickly and delivered to our hotel. Rouge was fine outside of that problem.

You do not have a space for flight cancelled. BUT!!! Air Canada handled it great. Was booked on another airline for the next day. The original flight was booked solid. But he precheck by the maintenance found a mechanical problem and the plane was not safe to fly. It was an inconvenience to have to wait until next day but I would rather arrive safely.

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

Flight kept delayed from morning to late afternoon so I had to make other arrangements

Crew was nice, explained emergency protocol very well. Flight took off and arrived on time. Pilot explained the small delay that occurred with docking and providing updates. I would definitely fly spirit again.

Terrible… missed our flight due to ridiculously long time to go thru baggage check-in!

The crew was not great or professional. It seemed like they didn't really want to be there. A true lack of effort for accommodating customers.

Everything was really good but the seats are not very comfortable.

I paid for WiFi, but it (WiFi) was very very slow, will never take again! Impossible open Utube 😤😤😤

I had no legroom, although I paid for extra legroom. I could barely put my bag in front of my feet and under the seat. The Wi-Fi was horrible. In fact the flight attendant said that they had to reboot it and see if it was going to work and never did.

Book cheap flights from St. Louis to Costa Rica

Recent round-trip flight deals

6/1Sat
1 stopSpirit Airlines
7h 49mSTL-SJO
6/10Mon
1 stopSpirit Airlines
20h 15mSJO-STL
$241
6/11Tue
1 stopSpirit Airlines
9h 46mSTL-SJO
6/12Wed
1 stopSpirit Airlines
27h 56mSJO-STL
$263
6/1Sat
1 stop
7h 49mSTL-SJO
6/7Fri
3 stops
30h 53mSJO-STL
$335
6/12Wed
2 stops
16h 53mSTL-SJO
6/19Wed
1 stop
27h 56mSJO-STL
$338
6/4Tue
2 stopsAmerican Airlines
17h 19mSTL-SJO
6/6Thu
2 stopsAmerican Airlines
19h 17mSJO-STL
$345
6/5Wed
2 stopsAmerican Airlines
17h 35mSTL-SJO
6/7Fri
2 stopsAmerican Airlines
21h 03mSJO-STL
$347
5/28Tue
1 stopUnited Airlines
17h 24mSTL-SJO
6/6Thu
1 stopUnited Airlines
15h 45mSJO-STL
$372
6/3Mon
1 stopUnited Airlines
17h 24mSTL-SJO
6/6Thu
1 stopUnited Airlines
15h 45mSJO-STL
$392
9/28Sat
1 stopDelta
6h 43mSTL-LIR
10/2Wed
1 stopDelta
9h 22mLIR-STL
$419
9/28Sat
1 stopDelta
6h 43mSTL-LIR
10/2Wed
1 stopDelta
9h 22mLIR-STL
$459

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Recent one-way flight deals

6/8Sat
1 stopSpirit Airlines
6h 47mSTL-SJO
$106
5/30Thu
1 stopSpirit Airlines
14h 51mSTL-SJO
$112
6/4Tue
2 stops
29h 25mSTL-SJO
$143
6/3Mon
2 stops
14h 23mSTL-SJO
$174
10/2Wed
1 stopDelta
6h 43mSTL-LIR
$184
8/11Sun
1 stopDelta
6h 53mSTL-SJO
$185
6/5Wed
1 stopAmerican Airlines
18h 08mSTL-SJO
$205
10/1Tue
2 stopsAmerican Airlines
21h 33mSTL-LIR
$211
6/5Wed
1 stopUnited Airlines
17h 24mSTL-SJO
$225
6/7Fri
1 stopUnited Airlines
17h 24mSTL-SJO
$245

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Last minute flights from St. Louis to Costa Rica

Last minute flight, train and bus deals

5/14Tue
multi-stopSpirit Airlines
19h 46mSTL-SJO
5/24Fri
multi-stopSpirit Airlines
14h 26mSJO-STL
$463
5/14Tue
multi-stopSpirit Airlines
19h 46mSTL-SJO
5/23Thu
multi-stopSpirit Airlines
7h 29mSJO-STL
$467
5/14Tue
multi-stopSpirit Airlines
19h 46mSTL-SJO
5/25Sat
multi-stopSpirit Airlines
27h 57mSJO-STL
$472
5/14Tue
multi-stopSpirit Airlines
10h 29mSTL-SJO
5/24Fri
multi-stopSpirit Airlines
14h 26mSJO-STL
$485
5/15Wed
multi-stopUnited Airlines
14h 18mSTL-SJO
5/25Sat
multi-stopUnited Airlines
8h 54mSJO-STL
$549
5/15Wed
multi-stopUnited Airlines
20h 01mSTL-SJO
5/25Sat
multi-stopUnited Airlines
8h 54mSJO-STL
$554
5/14Tue
multi-stopDelta
6h 44mSTL-SJO
5/15Wed
multi-stopDelta
9h 29mSJO-STL
$606
5/14Tue
multi-stopAmerican Airlines
8h 46mSTL-SJO
5/23Thu
multi-stopAmerican Airlines
16h 07mSJO-STL
$608
5/14Tue
multi-stopDelta
6h 44mSTL-SJO
5/15Wed
multi-stopDelta
18h 43mSJO-STL
$615
5/13Mon
multi-stopAmerican Airlines
9h 31mSTL-LIR
5/20Mon
multi-stopAmerican Airlines
8h 12mLIR-STL
$640

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St. Louis - Costa Rica Flights

Departure:

St. Louis (STL)United States

Return flight deals:

Costa Rica - St. Louis

Cabin classes: