$152+ Cheap flights from St. Louis (STL) to Costa Rica
This is the cheapest one-way flight price found by a Cheapflights user in the last 72 hours by searching for a flight departing on 8/1. Fares are subject to change and may not be available on all flights or dates of travel.
STL — SJO
Jun 12 — Jun 191
Round-trip
1 adult, Economy
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Find cheap flights from St. Louis to Costa Rica with Cheapflights
1. Tell us where you want to go
Enter your travel information like dates, passengers, trip type (one-way or round trip), and preferred cabin class then click “Find deals”2. Select your favorite providers
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Cheapest flights from St. Louis to Costa RicaExplore the most affordable flight options available from St. Louis to Costa Rica. Find the lowest fares from popular airlines and budget airlines, with prices last updated on May 13, 2026.
Explore the most affordable flight options available from St. Louis to Costa Rica. Find the lowest fares from popular airlines and budget airlines, with prices last updated on May 13, 2026.
This Expedia deal was found by Cheapflights users on 5/12. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Expedia is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Sat 7/44:17 pm
STL
- SJO
1 stop17h 03m
Frontier
Sat 7/119:35 am
SJO
- STL
1 stop13h 24m
Frontier
Deal found 5/12![Frontier logo]()
$346
This Expedia deal was found by Cheapflights users on 5/9. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Expedia is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Sat 6/204:17 pm
STL
- SJO
1 stop17h 03m
Frontier
Sat 7/119:35 am
SJO
- STL
1 stop13h 24m
Frontier
Deal found 5/9![Frontier logo]()
$352
This CheapOair deal was found by Cheapflights users on 5/12. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure CheapOair is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Sun 8/304:10 pm
STL
- SJO
1 stop17h 10m
Frontier
Thu 9/39:35 am
SJO
- STL
1 stop13h 39m
Frontier
Deal found 5/12![Frontier logo]()
$368
This Orbitz deal was found by Cheapflights users on 5/9. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Orbitz is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Fri 8/74:09 pm
STL
- SJO
1 stop17h 11m
Frontier
Sat 8/229:35 am
SJO
- STL
1 stop13h 39m
Frontier
Deal found 5/9![Frontier logo]()
$378
This CheapOair deal was found by Cheapflights users on 5/10. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure CheapOair is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Sat 7/254:09 pm
STL
- SJO
1 stop17h 11m
Frontier
Sat 8/19:35 am
SJO
- STL
1 stop13h 24m
Frontier
Deal found 5/10![Frontier logo]()
$382
This Priceline deal was found by Cheapflights users on 5/12. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Priceline is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Sat 8/154:09 pm
STL
- SJO
1 stop17h 11m
Frontier
Sat 8/229:35 am
SJO
- STL
2 stops30h 55m
Frontier
Deal found 5/12![Frontier logo]()
$397
This Expedia deal was found by Cheapflights users on 5/8. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Expedia is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Fri 7/34:17 pm
STL
- SJO
1 stop17h 03m
Frontier
Sat 7/119:35 am
SJO
- STL
1 stop13h 24m
Frontier
Deal found 5/8![Frontier logo]()
$436
This Expedia deal was found by Cheapflights users on 5/8. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Expedia is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Fri 7/34:17 pm
STL
- SJO
1 stop17h 03m
Frontier
Sun 7/129:35 am
SJO
- STL
1 stop13h 24m
Frontier
Deal found 5/8![Frontier logo]()
$442
This Air Canada deal was found by Cheapflights users on 5/12. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Air Canada is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Fri 5/297:05 am
STL
- LIR
1 stop30h 00m
Air Canada
Sat 6/61:00 pm
LIR
- STL
1 stop22h 06m
Air Canada
Deal found 5/12![Air Canada logo]()
$468
This American Airlines deal was found by Cheapflights users on 5/12. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure American Airlines is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Mon 7/205:29 am
STL
- LIR
1 stop10h 11m
American Airlines
Thu 7/233:40 pm
LIR
- STL
1 stop16h 07m
American Airlines
Deal found 5/12![American Airlines logo]()
$492
This American Airlines deal was found by Cheapflights users on 5/8. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure American Airlines is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Sat 10/176:28 pm
STL
- LIR
2 stops17h 37m
American Airlines
Fri 10/231:15 pm
LIR
- STL
2 stops21h 45m
American Airlines
Deal found 5/8![American Airlines logo]()
$497
This Air Canada deal was found by Cheapflights users on 5/12. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Air Canada is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Mon 11/24:15 pm
STL
- LIR
1 stop21h 40m
Air Canada
Thu 11/52:55 pm
LIR
- STL
1 stop24h 35m
Air Canada
Deal found 5/12![Air Canada logo]()
$511
Best flights from St. Louis to Costa RicaDiscover carefully curated flight deals from St. Louis to Costa Rica that have cost, travel time, and layovers in mind to ensure you get the best travel experience. Data last updated May 13, 2026.
Discover carefully curated flight deals from St. Louis to Costa Rica that have cost, travel time, and layovers in mind to ensure you get the best travel experience. Data last updated May 13, 2026.
This American Airlines deal was found by Cheapflights users on 5/8. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure American Airlines is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Sat 10/176:28 pm
STL
- LIR
2 stops17h 37m
American Airlines
Fri 10/231:15 pm
LIR
- STL
2 stops21h 45m
American Airlines
Deal found 5/8![American Airlines logo]()
$497
This United Airlines deal was found by Cheapflights users on 5/12. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure United Airlines is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Thu 5/286:14 am
STL
- LIR
1 stop6h 56m
United Airlines
Sat 6/63:27 pm
LIR
- STL
2 stops18h 12m
United Airlines
Deal found 5/12![United Airlines logo]()
$537
This Kiwi.com deal was found by Cheapflights users on 5/8. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Kiwi.com is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Fri 7/35:06 pm
STL
- SJO
2 stops40h 14m
Frontier
Sun 7/129:35 am
SJO
- STL
1 stop13h 24m
Frontier
Deal found 5/8![Frontier logo]()
$555
This Southwest deal was found by Cheapflights users on 5/8. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Southwest is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Fri 7/31:50 pm
STL
- SJO
1 stop6h 50m
Southwest
Sat 7/1112:15 pm
SJO
- STL
2 stops9h 55m
Southwest
Deal found 5/8![Southwest logo]()
$615
This American Airlines deal was found by Cheapflights users on 5/8. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure American Airlines is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Sat 10/106:28 pm
STL
- LIR
2 stops17h 37m
American Airlines
Sat 10/172:10 pm
LIR
- STL
1 stop8h 31m
American Airlines
Deal found 5/8![American Airlines logo]()
$569
This American Airlines deal was found by Cheapflights users on 5/12. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure American Airlines is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Fri 11/65:00 am
STL
- SJO
1 stop7h 22m
American Airlines
Sat 3/133:59 pm
SJO
- STL
1 stop17h 30m
American Airlines
Deal found 5/12![American Airlines logo]()
$570
This United Airlines deal was found by Cheapflights users on 5/12. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure United Airlines is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Sun 7/56:14 am
STL
- SJO
1 stop28h 57m
United Airlines
Tue 7/712:30 am
SJO
- STL
1 stop8h 37m
United Airlines
Deal found 5/12![United Airlines logo]()
$629
This United Airlines deal was found by Cheapflights users on 5/13. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure United Airlines is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Mon 6/16:24 pm
STL
- LIR
1 stop16h 26m
United Airlines
Mon 6/83:27 pm
LIR
- STL
1 stop17h 40m
United Airlines
Deal found 5/13![United Airlines logo]()
$632
This Southwest deal was found by Cheapflights users on 5/9. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Southwest is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Sat 6/65:20 am
STL
- SJO
1 stop9h 15m
Southwest
Sat 6/1312:00 pm
SJO
- STL
1 stop9h 00m
Southwest
Deal found 5/9![Southwest logo]()
$751
This United Airlines deal was found by Cheapflights users on 5/12. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure United Airlines is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Tue 5/268:35 am
STL
- LIR
1 stop26h 15m
United Airlines
Fri 6/54:30 pm
LIR
- STL
1 stop30h 05m
United Airlines
Deal found 5/12![United Airlines logo]()
$633
This Southwest deal was found by Cheapflights users on 5/12. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Southwest is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Thu 6/1111:25 am
STL
- SJO
2 stops9h 15m
Southwest
Thu 6/188:45 am
SJO
- STL
2 stops11h 15m
Southwest
Deal found 5/12![Southwest logo]()
$755
This United Airlines deal was found by Cheapflights users on 5/10. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure United Airlines is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Thu 7/21:13 pm
STL
- SJO
2 stops21h 58m
United Airlines
Fri 7/1011:13 am
SJO
- STL
2 stops23h 58m
United Airlines
Deal found 5/10![United Airlines logo]()
$647
This Southwest deal was found by Cheapflights users on 5/8. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Southwest is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Thu 6/48:55 am
STL
- SJO
2 stops11h 45m
Southwest
Thu 6/118:45 am
SJO
- STL
2 stops13h 25m
Southwest
Deal found 5/8![Southwest logo]()
$755
This United Airlines deal was found by Cheapflights users on 5/13. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure United Airlines is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Sat 6/205:10 am
STL
- SJO
1 stop17h 05m
United Airlines
Fri 7/1012:30 am
SJO
- STL
2 stops17h 53m
United Airlines
Deal found 5/13![United Airlines logo]()
$764
This United Airlines deal was found by Cheapflights users on 5/10. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure United Airlines is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Wed 6/246:14 am
STL
- SJO
1 stop28h 57m
United Airlines
Wed 7/112:44 pm
SJO
- STL
1 stop10h 00m
United Airlines
Deal found 5/10![United Airlines logo]()
$773
Last-minute flights from St. Louis to Costa RicaDiscover last-minute flight deals from St. Louis to Costa Rica. Data last updated May 13, 2026 and is based on user searches.
Discover last-minute flight deals from St. Louis to Costa Rica. Data last updated May 13, 2026 and is based on user searches.
This Frontier deal was found by Cheapflights users on 5/12. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Frontier is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Wed 5/278:08 pm
STL
- SJO
2 stops13h 11m
Frontier
Thu 6/49:35 am
SJO
- STL
1 stop13h 22m
Frontier
Deal found 5/12![Frontier logo]()
$496
This Frontier deal was found by Cheapflights users on 5/12. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Frontier is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Wed 5/278:08 pm
STL
- SJO
2 stops13h 11m
Frontier
Sun 5/319:35 am
SJO
- STL
1 stop13h 22m
Frontier
Deal found 5/12![Frontier logo]()
$512
This Air Canada deal was found by Cheapflights users on 5/12. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Air Canada is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Fri 5/297:05 am
STL
- LIR
1 stop30h 00m
Air Canada
Sat 6/61:00 pm
LIR
- STL
1 stop22h 06m
Air Canada
Deal found 5/12![Air Canada logo]()
$468
This United Airlines deal was found by Cheapflights users on 5/11. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure United Airlines is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Fri 5/296:14 am
STL
- LIR
1 stop6h 56m
United Airlines
Mon 6/13:27 pm
LIR
- STL
1 stop17h 40m
United Airlines
Deal found 5/11![United Airlines logo]()
$532
This American Airlines deal was found by Cheapflights users on 5/12. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure American Airlines is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Fri 5/296:12 pm
STL
- LIR
2 stops18h 10m
American Airlines
Mon 6/13:37 pm
LIR
- STL
1 stop16h 14m
American Airlines
Deal found 5/12![American Airlines logo]()
$537
This Frontier deal was found by Cheapflights users on 5/12. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Frontier is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Sat 5/308:08 pm
STL
- SJO
2 stops13h 11m
Frontier
Thu 6/49:35 am
SJO
- STL
1 stop13h 22m
Frontier
Deal found 5/12![Frontier logo]()
$516
This American Airlines deal was found by Cheapflights users on 5/10. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure American Airlines is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Sun 5/318:36 am
STL
- SJO
1 stop15h 06m
American Airlines
Fri 6/511:59 pm
SJO
- STL
1 stop17h 30m
American Airlines
Deal found 5/10![American Airlines logo]()
$502
This American Airlines deal was found by Cheapflights users on 5/8. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure American Airlines is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Thu 6/47:04 am
STL
- SJO
1 stop16h 39m
American Airlines
Thu 6/112:10 pm
SJO
- STL
1 stop8h 49m
American Airlines
Deal found 5/8![American Airlines logo]()
$522
This CheapOair deal was found by Cheapflights users on 5/10. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure CheapOair is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Tue 6/167:03 pm
STL
- SJO
2 stops38h 17m
Frontier
Thu 7/99:35 am
SJO
- STL
2 stops22h 22m
Frontier
Deal found 5/10![Frontier logo]()
$488
This Kiwi.com deal was found by Cheapflights users on 5/10. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Kiwi.com is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Tue 6/164:17 pm
STL
- SJO
1 stop23h 54m
Multiple Airlines
Thu 7/99:35 am
SJO
- STL
1 stop13h 24m
Multiple Airlines
Deal found 5/10![Multiple Airlines logo]()
$534
This Expedia deal was found by Cheapflights users on 5/9. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Expedia is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Sat 6/204:17 pm
STL
- SJO
1 stop17h 03m
Frontier
Sat 7/119:35 am
SJO
- STL
1 stop13h 24m
Frontier
Deal found 5/9![Frontier logo]()
$352
This American Airlines deal was found by Cheapflights users on 5/11. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure American Airlines is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Sat 6/276:12 pm
STL
- LIR
2 stops18h 10m
American Airlines
Tue 7/72:47 pm
LIR
- STL
2 stops20h 13m
American Airlines
Deal found 5/11![American Airlines logo]()
$572
One-way flights from St. Louis to Costa RicaSearch for one-way flight options from St. Louis to Costa Rica. Find affordable one-way fares based on user searches. Data last updated May 13, 2026.
Search for one-way flight options from St. Louis to Costa Rica. Find affordable one-way fares based on user searches. Data last updated May 13, 2026.
This Expedia deal was found by Cheapflights users on 5/10. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Expedia is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Sat 8/14:09 pm
STL
- SJO
1 stop17h 11m
Frontier
Deal found 5/10![Frontier logo]()
$152
This Expedia deal was found by Cheapflights users on 5/12. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Expedia is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Wed 6/34:19 pm
STL
- SJO
1 stop17h 00m
Frontier
Deal found 5/12![Frontier logo]()
$178
This Priceline deal was found by Cheapflights users on 5/12. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Priceline is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Sat 5/304:19 pm
STL
- SJO
1 stop17h 00m
Frontier
Deal found 5/12![Frontier logo]()
$188
This Delta deal was found by Cheapflights users on 5/10. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Delta is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Mon 7/206:00 am
STL
- LIR
1 stop7h 00m
Delta
Deal found 5/10![Delta logo]()
$230
This American Airlines deal was found by Cheapflights users on 5/10. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure American Airlines is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Sun 8/27:06 am
STL
- SJO
1 stop8h 31m
American Airlines
Deal found 5/10![American Airlines logo]()
$230
This American Airlines deal was found by Cheapflights users on 5/10. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure American Airlines is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Sat 7/187:23 pm
STL
- LIR
2 stops18h 52m
American Airlines
Deal found 5/10![American Airlines logo]()
$236
This Kiwi.com deal was found by Cheapflights users on 5/12. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Kiwi.com is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Wed 6/35:27 pm
STL
- SJO
3 stops56h 48m
Multiple Airlines
Deal found 5/12![Multiple Airlines logo]()
$255
This Kiwi.com deal was found by Cheapflights users on 5/8. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Kiwi.com is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Mon 6/155:06 pm
STL
- SJO
2 stops23h 05m
Multiple Airlines
Deal found 5/8![Multiple Airlines logo]()
$260
This American Airlines deal was found by Cheapflights users on 5/9. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure American Airlines is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Thu 5/287:03 am
STL
- SJO
1 stop16h 39m
American Airlines
Deal found 5/9![American Airlines logo]()
$268
This Copa Airlines deal was found by Cheapflights users on 5/9. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Copa Airlines is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Thu 5/288:00 am
STL
- SJO
2 stops24h 09m
Copa Airlines
Deal found 5/9![Copa Airlines logo]()
$269
This KAYAK deal was found by Cheapflights users on 5/10. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure KAYAK is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Mon 7/206:12 pm
STL
- LIR
2 stops20h 03m
GOL
Deal found 5/10![GOL logo]()
$278
This KAYAK deal was found by Cheapflights users on 5/10. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure KAYAK is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Sat 7/185:19 pm
STL
- LIR
2 stops20h 56m
GOL
Deal found 5/10![GOL logo]()
$283
Find flight deals from St. Louis to Costa Rica
Keep the following information in mind while searching for St. Louis to Costa Rica flight deals. Data was last updated May 13, 2026.
Most accurate provider | FlightHub 3 stars |
|---|---|
Most trusted provider | FlightHub 3 stars |
Round-trip from | $346 (Expedia) |
One-way from | $152 (Expedia) |
Popular in | December |
Cheapest in | January |
Average price | $472 |
Cheapflights Fare Finder
Customize your flight search to find flights from St. Louis to Costa Rica that fit within your specific budget. Explore options based on user searches and filter the results based on your desired price range. Find flights that match your budget for a cost-effective journey. Over the last 7 days, Cheapflights users made 2,558,603 searches. Data last updated May 13, 2026.
Use the filters below to find and compare flights from St. Louis to Costa Rica that are best for you.
Fly from
Fly to
Route
Depart
Return
Cheapest round-trip
St. LouisLiberia
STL - LIR
STLLIR
Lambert-St Louis
Sat 10/17
6:28 pm-11:05 am
2 stops17h 37m
Liberia
Fri 10/23
1:15 pm-12:00 pm
2 stops21h 45m
$497
St. LouisLiberia
STL - LIR
STLLIR
Lambert-St Louis
Thu 5/28
6:14 am-12:10 pm
1 stop6h 56m
Liberia
Sat 6/6
3:27 pm-10:39 am
2 stops18h 12m
$537
St. LouisSan José
STL - SJO
STLSJO
Lambert-St Louis
Fri 7/3
5:06 pm-8:20 am
2 stops40h 14m
San José Juan Santamaria Intl
Sun 7/12
9:35 am-11:59 pm
1 stop13h 24m
$555
St. LouisLiberia
STL - LIR
STLLIR
Lambert-St Louis
Sat 10/10
6:28 pm-11:05 am
2 stops17h 37m
Liberia
Sat 10/17
2:10 pm-11:41 pm
1 stop8h 31m
$569
St. LouisSan José
STL - SJO
STLSJO
Lambert-St Louis
Fri 11/6
5:00 am-12:22 pm
1 stop7h 22m
San José Juan Santamaria Intl
Sat 3/13
3:59 pm-9:29 am
1 stop17h 30m
$570
Quickest round-trip
St. LouisSan José
STL - SJO
STLSJO
Lambert-St Louis
Fri 7/3
1:50 pm-7:40 pm
1 stop6h 50m
San José Juan Santamaria Intl
Sat 7/11
12:15 pm-11:10 pm
2 stops9h 55m
$615
St. LouisSan José
STL - SJO
STLSJO
Lambert-St Louis
Sun 7/5
6:14 am-10:11 am
1 stop28h 57m
San José Juan Santamaria Intl
Tue 7/7
12:30 am-10:07 am
1 stop8h 37m
$629
St. LouisLiberia
STL - LIR
STLLIR
Lambert-St Louis
Mon 6/1
6:24 pm-9:50 am
1 stop16h 26m
Liberia
Mon 6/8
3:27 pm-10:07 am
1 stop17h 40m
$632
St. LouisLiberia
STL - LIR
STLLIR
Lambert-St Louis
Tue 5/26
8:35 am-9:50 am
1 stop26h 15m
Liberia
Fri 6/5
4:30 pm-11:35 pm
1 stop30h 05m
$633
St. LouisSan José
STL - SJO
STLSJO
Lambert-St Louis
Thu 7/2
1:13 pm-10:11 am
2 stops21h 58m
San José Juan Santamaria Intl
Fri 7/10
11:13 am-12:11 pm
2 stops23h 58m
$647
Showing 1-10 of 31 resultsSorted by cheapest first
Best time to book a flight from St. Louis to Costa Rica
Have a flexible travel schedule? Discover the best time to fly to Costa Rica from St. Louis with our price prediction graph.
STL-SJO
STL-LIR
Estimated round-trip price
Rates are based on past data. Find the cheapest month and day to book your flight based on your travel requirements, then search for cheap deals.
Cheapflights Insights
Everything you need to know about your flight from St. Louis to Costa Rica
STL-CR0
STL-SJO
STL-LIR
How far ahead should I book a flight from St. Louis to Costa Rica?
Booking 66 days in advance of your planned departure date is, on average, the best time to get cheap flights from St. Louis to Costa Rica. The general trend is that the closer you book to the departure date, the more expensive your flight will be.
What is the cheapest month to book a flight from St. Louis to Costa Rica?
Currently, August is the cheapest month in which you can book a flight from St. Louis to Costa Rica (average of $131). Flying from St. Louis to Costa Rica in June is currently the most expensive (average of $396). There are several factors that can impact the price of a flight, so comparing airlines, departure airports and flight times can provide users with more options.
Reviews of airlines servicing Costa Rica
Get insights into the airlines that provide service to Costa Rica. Read reviews, discover amenities, and learn about the overall travel experience offered by airlines. Use this information to make informed decisions when choosing an airline for your flight to Costa Rica. Reviews last updated May 13, 2026.
Read through reviews of airlines operating flights from St. Louis to Costa Rica, such as Southwest,Delta, andUnited Airlines. Reviews also offer insight into each airline's entertainment options, comfort, food, crew/service, and boarding process.
Overall
7.9
Entertainment
7.5
Food
7.0
Crew
8.6
Boarding
8.1
Comfort
8.0
Reviews
1 / 20
2.0
MediocreDominic,Mar 2026
MCO - SMF
Overall
7.9
Entertainment
7.5
Food
7.0
Crew
8.6
Boarding
8.1
Comfort
8.0
Reviews
1 / 20
2.0
MediocreDominic,Mar 2026
MCO - SMF
Overall
7.9
Entertainment
7.5
Food
7.0
Crew
8.6
Boarding
8.1
Comfort
8.0
Reviews
1 / 20
2.0
MediocreDominic,Mar 2026
MCO - SMF
Overall
7.9
Entertainment
7.5
Food
7.0
Crew
8.6
Boarding
8.1
Comfort
8.0
Reviews
1 / 20
2.0
MediocreDominic,Mar 2026
MCO - SMF
Overall
7.9
Entertainment
7.5
Food
7.0
Crew
8.6
Boarding
8.1
Comfort
8.0
Reviews
1 / 20
2.0
MediocreDominic,Mar 2026
MCO - SMF
Overall
7.9
Entertainment
7.5
Food
7.0
Crew
8.6
Boarding
8.1
Comfort
8.0
Reviews
1 / 20
2.0
MediocreDominic,Mar 2026
MCO - SMF
Related info for your journey
Find useful and relevant information for your journey from St. Louis to Costa Rica. Access travel guides, tips, and recommendations to enhance your travel experience. Get information about local attractions, weather, transportation options, and more.
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Alternative routes for St. Louis to Costa Rica
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Complete your trip
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St. Louis and Costa Rica flights
Browse other St. Louis and Costa Rica flight options. Last updated on May 13, 2026.
Popular flight searches
Check out other popular destinations found by fellow travelers in 2026
Top 5 airlines flying from St. Louis to Costa Rica
Discover the top 5 airlines that operate flights from St. Louis to Costa Rica. Compare their services, reliability, and customer satisfaction ratings to choose the airline that best suits your travel preferences and needs. Over the last 7 days, Cheapflights users made 2,558,603 searches. Data last updated May 13, 2026.
| Airline | Cheapest | Average | Flexibility | On-time |
|---|---|---|---|---|
| Cheapest$294 | Average$506 | FlexibilityNo cancel fee | On-timeN/A | |
| Cheapest$314 | Average$507 | FlexibilityNo cancel fee | On-time71% | |
| Cheapest$327 | Average$508 | FlexibilityNo cancel fee | On-time69% | |
| Cheapest$383 | Average$749 | FlexibilityNo cancel fee | On-time63% | |
| Cheapest$644 | Average$1,039 | FlexibilityNo cancel fee | On-time74% |