$199+ Cheap flights from St. Louis (STL) to Costa Rica
This is the cheapest round-trip flight price found by a Cheapflights user in the last 72 hours by searching for a flight departing on 1/11. Fares are subject to change and may not be available on all flights or dates of travel.
STL — SJO
Nov 22 — Nov 291
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
We find the providers serving your travel needs. Choose up to four travel providers to compare side-by-side for flights, hotels, or car rentals.3. Compare prices and book
Review each provider’s pricing and select the best option for you! Book through your favorite provider’s website for a seamless experience.Cheap flight deals from St. Louis to Costa Rica
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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 October 23, 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 October 23, 2026.
This Air Canada deal was found by Cheapflights users on 10/19. 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 11/164:05 pm -
2 stops22h 15m
Sat 11/213:10 pm -
1 stop24h 16m
Deal found 10/19![Air Canada logo]()
$399
This United Airlines deal was found by Cheapflights users on 10/20. 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 11/177:30 am -
2 stops13h 09m
Wed 12/162:25 pm -
1 stop8h 05m
Deal found 10/20![United Airlines logo]()
$443
This United Airlines deal was found by Cheapflights users on 10/20. 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 11/109:59 am -
1 stop9h 54m
Tue 11/178:45 am -
2 stops12h 55m
Deal found 10/20![United Airlines logo]()
$447
This Delta deal was found by Cheapflights users on 10/20. 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.
Tue 11/102:31 pm -
1 stop7h 44m
Tue 11/177:00 am -
1 stop11h 13m
Deal found 10/20![Delta logo]()
$490
This United Airlines deal was found by Cheapflights users on 10/20. 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 12/26:00 am -
1 stop7h 22m
Mon 12/78:45 am -
2 stops12h 38m
Deal found 10/20![United Airlines logo]()
$494
This American Airlines deal was found by Cheapflights users on 10/21. 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.
Wed 11/117:06 pm -
1 stop18h 40m
Wed 11/182:46 pm -
1 stop8h 47m
Deal found 10/21![American Airlines logo]()
$498
This American Airlines deal was found by Cheapflights users on 10/19. 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.
Tue 11/176:44 pm -
2 stops20h 05m
Sat 11/2112:37 am -
2 stops12h 07m
Deal found 10/19![American Airlines logo]()
$499
This deal was found by Cheapflights users on 10/19. 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 is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Tue 11/102:31 pm -
1 stop7h 44m
Sat 11/142:37 pm -
1 stop9h 19m
Deal found 10/19![Delta logo]()
$537
This United Airlines deal was found by Cheapflights users on 10/20. 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 11/179:59 am -
1 stop9h 54m
Tue 12/222:25 pm -
1 stop8h 05m
Deal found 10/20![United Airlines logo]()
$541
This American Airlines deal was found by Cheapflights users on 10/21. 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 11/135:00 am -
1 stop8h 46m
Sat 11/2112:37 am -
1 stop11h 49m
Deal found 10/21![American Airlines logo]()
$542
This American Airlines deal was found by Cheapflights users on 10/20. 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.
Tue 11/176:44 pm -
2 stops20h 05m
Fri 12/1811:35 am -
2 stops12h 24m
Deal found 10/20![American Airlines logo]()
$545
This American Airlines deal was found by Cheapflights users on 10/21. 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 12/58:24 pm -
2 stops17h 55m
Sat 12/123:35 pm -
2 stops20h 40m
Deal found 10/21![American Airlines logo]()
$548
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 October 23, 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 October 23, 2026.
This Air Canada deal was found by Cheapflights users on 10/19. 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 11/164:05 pm -
2 stops22h 15m
Sat 11/213:10 pm -
1 stop24h 16m
Deal found 10/19![Air Canada logo]()
$399
This United Airlines deal was found by Cheapflights users on 10/22. 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 2/106:15 am -
1 stop6h 55m
Thu 2/112:06 pm -
1 stop9h 13m
Deal found 10/22![United Airlines logo]()
$431
This Delta deal was found by Cheapflights users on 10/20. 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.
Thu 1/76:00 am -
1 stop6h 45m
Thu 1/141:50 pm -
1 stop9h 28m
Deal found 10/20![Delta logo]()
$544
This United Airlines deal was found by Cheapflights users on 10/20. 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 12/26:00 am -
1 stop7h 22m
Mon 12/72:25 pm -
1 stop8h 05m
Deal found 10/20![United Airlines logo]()
$490
This United Airlines deal was found by Cheapflights users on 10/20. 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 1/86:15 am -
1 stop12h 01m
Tue 1/121:15 am -
1 stop8h 16m
Deal found 10/20![United Airlines logo]()
$490
This United Airlines deal was found by Cheapflights users on 10/19. 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 3/25:00 am -
2 stops11h 10m
Tue 3/92:20 pm -
1 stop7h 52m
Deal found 10/19![United Airlines logo]()
$519
This United Airlines deal was found by Cheapflights users on 10/20. 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 11/179:59 am -
1 stop9h 54m
Fri 12/182:25 pm -
1 stop8h 05m
Deal found 10/20![United Airlines logo]()
$541
This United Airlines deal was found by Cheapflights users on 10/20. 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 1/66:45 pm -
1 stop18h 11m
Wed 1/132:06 pm -
1 stop9h 14m
Deal found 10/20![United Airlines logo]()
$561
This United Airlines deal was found by Cheapflights users on 10/22. 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 12/71:18 pm -
2 stops22h 36m
Wed 12/95:20 pm -
2 stops21h 21m
Deal found 10/22![United Airlines logo]()
$565
This United Airlines deal was found by Cheapflights users on 10/22. 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 1/201:17 pm -
2 stops23h 53m
Thu 1/282:20 pm -
2 stops21h 53m
Deal found 10/22![United Airlines logo]()
$565
This United Airlines deal was found by Cheapflights users on 10/18. 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 11/176:15 am -
1 stop6h 55m
Tue 11/242:20 pm -
1 stop8h 06m
Deal found 10/18![United Airlines logo]()
$599
This United Airlines deal was found by Cheapflights users on 10/22. 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 11/166:00 am -
2 stops38h 39m
Thu 11/192:25 pm -
2 stops20h 07m
Deal found 10/22![United Airlines logo]()
$643
This United Airlines deal was found by Cheapflights users on 10/21. 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 1/25:20 am -
2 stops17h 12m
Fri 1/151:15 am -
2 stops20h 22m
Deal found 10/21![United Airlines logo]()
$747
This United Airlines deal was found by Cheapflights users on 10/18. 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 12/26:00 am -
1 stop14h 39m
Wed 12/98:45 am -
1 stop9h 56m
Deal found 10/18![United Airlines logo]()
$769
This United Airlines deal was found by Cheapflights users on 10/18. 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 1/36:15 am -
1 stop14h 24m
Sun 1/178:45 am -
1 stop13h 45m
Deal found 10/18![United Airlines logo]()
$794
This United Airlines deal was found by Cheapflights users on 10/21. 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 12/306:15 am -
1 stop16h 17m
Thu 1/71:15 am -
2 stops22h 05m
Deal found 10/21![United Airlines logo]()
$798
Last-minute flights from St. Louis to Costa RicaDiscover last-minute flight deals from St. Louis to Costa Rica. Data last updated October 23, 2026 and is based on user searches.
Discover last-minute flight deals from St. Louis to Costa Rica. Data last updated October 23, 2026 and is based on user searches.
This United Airlines deal was found by Cheapflights users on 10/20. 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 11/109:59 am -
1 stop9h 54m
Tue 11/178:45 am -
2 stops12h 55m
Deal found 10/20![United Airlines logo]()
$447
This Delta deal was found by Cheapflights users on 10/20. 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.
Tue 11/102:31 pm -
1 stop7h 44m
Tue 11/177:00 am -
1 stop11h 13m
Deal found 10/20![Delta logo]()
$490
This deal was found by Cheapflights users on 10/19. 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 is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Tue 11/102:31 pm -
1 stop7h 44m
Mon 11/162:37 pm -
1 stop9h 19m
Deal found 10/19![Delta logo]()
$537
This American Airlines deal was found by Cheapflights users on 10/21. 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.
Wed 11/117:06 pm -
1 stop18h 40m
Wed 11/182:46 pm -
1 stop8h 47m
Deal found 10/21![American Airlines logo]()
$498
This American Airlines deal was found by Cheapflights users on 10/21. 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 11/135:00 am -
1 stop8h 46m
Sat 11/2112:37 am -
1 stop11h 49m
Deal found 10/21![American Airlines logo]()
$542
This Air Canada deal was found by Cheapflights users on 10/19. 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 11/164:05 pm -
2 stops22h 15m
Sat 11/213:10 pm -
1 stop24h 16m
Deal found 10/19![Air Canada logo]()
$399
This United Airlines deal was found by Cheapflights users on 10/19. 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 11/166:50 pm -
2 stops17h 04m
Sat 11/215:20 pm -
2 stops17h 12m
Deal found 10/19![United Airlines logo]()
$652
This United Airlines deal was found by Cheapflights users on 10/20. 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 11/176:15 am -
1 stop7h 07m
Tue 12/1511:28 pm -
1 stop10h 21m
Deal found 10/20![United Airlines logo]()
$443
This American Airlines deal was found by Cheapflights users on 10/19. 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.
Tue 11/176:44 pm -
2 stops20h 05m
Sat 11/2112:37 am -
2 stops12h 07m
Deal found 10/19![American Airlines logo]()
$499
This United Airlines deal was found by Cheapflights users on 10/20. 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 11/177:30 am -
2 stops12h 23m
Tue 12/2212:35 pm -
1 stop7h 48m
Deal found 10/20![United Airlines logo]()
$541
This American Airlines deal was found by Cheapflights users on 10/20. 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.
Tue 11/176:44 pm -
2 stops20h 05m
Fri 12/1811:35 am -
2 stops12h 24m
Deal found 10/20![American Airlines logo]()
$545
This United Airlines deal was found by Cheapflights users on 10/18. 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 11/176:50 pm -
2 stops17h 04m
Tue 11/245:20 pm -
1 stop15h 33m
Deal found 10/18![United Airlines logo]()
$599
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 October 23, 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 October 23, 2026.
This Delta deal was found by Cheapflights users on 10/21. 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 1/116:00 am -
1 stop6h 45m
Wed 12/3112:00 am -
Nonstop0h 00m
Deal found 10/21![Delta logo]()
$199
This Delta deal was found by Cheapflights users on 10/21. 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.
Sun 1/106:45 am -
2 stops29h 50m
Wed 12/3112:00 am -
Nonstop0h 00m
Deal found 10/21![Delta logo]()
$205
This American Airlines deal was found by Cheapflights users on 10/19. 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.
Tue 12/86:44 pm -
2 stops17h 53m
Wed 12/3112:00 am -
Nonstop0h 00m
Deal found 10/19![American Airlines logo]()
$205
This American Airlines deal was found by Cheapflights users on 10/21. 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 1/93:45 pm -
2 stops22h 31m
Wed 12/3112:00 am -
Nonstop0h 00m
Deal found 10/21![American Airlines logo]()
$245
This American Airlines deal was found by Cheapflights users on 10/19. 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 12/65:38 pm -
2 stops19h 22m
Wed 12/3112:00 am -
Nonstop0h 00m
Deal found 10/19![American Airlines logo]()
$246
This American Airlines deal was found by Cheapflights users on 10/19. 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 11/126:02 am -
2 stops14h 48m
Wed 12/3112:00 am -
Nonstop0h 00m
Deal found 10/19![American Airlines logo]()
$247
This American Airlines deal was found by Cheapflights users on 10/19. 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 11/136:02 am -
2 stops14h 48m
Wed 12/3112:00 am -
Nonstop0h 00m
Deal found 10/19![American Airlines logo]()
$252
This Air Canada deal was found by Cheapflights users on 10/18. 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.
Tue 4/134:05 pm -
1 stop22h 00m
Wed 12/3112:00 am -
Nonstop0h 00m
Deal found 10/18![Air Canada logo]()
$255
This American Airlines deal was found by Cheapflights users on 10/19. 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 11/277:45 am -
2 stops13h 12m
Wed 12/3112:00 am -
Nonstop0h 00m
Deal found 10/19![American Airlines logo]()
$256
This American Airlines deal was found by Cheapflights users on 10/19. 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 12/510:23 am -
1 stop26h 19m
Wed 12/3112:00 am -
Nonstop0h 00m
Deal found 10/19![American Airlines logo]()
$260
This American Airlines deal was found by Cheapflights users on 10/19. 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 12/126:15 pm -
1 stop26h 36m
Wed 12/3112:00 am -
Nonstop0h 00m
Deal found 10/19![American Airlines logo]()
$263
This American Airlines deal was found by Cheapflights users on 10/19. 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 12/106:15 pm -
1 stop20h 37m
Wed 12/3112:00 am -
Nonstop0h 00m
Deal found 10/19![American Airlines logo]()
$264
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 October 23, 2026.
Most accurate provider | Ovago 3 stars |
|---|---|
Most trusted provider | Ovago 3 stars |
Round-trip from | $399 (Air Canada) |
One-way from | $199 (Delta) |
Popular in | December |
Cheapest in | May |
Average price | $565 |
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 7,457,451 searches. Data last updated October 23, 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 Lambert-St Louis - LIR Liberia
STLLIR
Lambert-St Louis
Sun 1/10
5:30 pm-12:35 pm
1 stop19h 05m
Liberia
Wed 12/31
12:00 am-12:00 am
Nonstop0h 00m
$199
St. LouisLiberia
STL Lambert-St Louis - LIR Liberia
STLLIR
Lambert-St Louis
Mon 1/11
3:45 pm-12:39 pm
2 stops20h 54m
Liberia
Wed 12/31
12:00 am-12:00 am
Nonstop0h 00m
$199
St. LouisSan José
STL Lambert-St Louis - SJO San José Juan Santamaria Intl
STLSJO
Lambert-St Louis
Thu 11/12
6:02 am-8:50 pm
2 stops14h 48m
San José Juan Santamaria Intl
Wed 12/31
12:00 am-12:00 am
Nonstop0h 00m
$247
St. LouisLiberia
STL Lambert-St Louis - LIR Liberia
STLLIR
Lambert-St Louis
Tue 4/13
4:05 pm-1:20 pm
2 stops22h 15m
Liberia
Wed 12/31
12:00 am-12:00 am
Nonstop0h 00m
$258
St. LouisSan José
STL Lambert-St Louis - SJO San José Juan Santamaria Intl
STLSJO
Lambert-St Louis
Thu 12/31
5:58 pm-2:16 pm
2 stops20h 18m
San José Juan Santamaria Intl
Wed 12/31
12:00 am-12:00 am
Nonstop0h 00m
$316
St. LouisLiberia
STL Lambert-St Louis - LIR Liberia
STLLIR
Lambert-St Louis
Fri 1/8
5:45 pm-11:10 am
1 stop17h 25m
Liberia
Wed 12/31
12:00 am-12:00 am
Nonstop0h 00m
$322
St. LouisSan José
STL Lambert-St Louis - SJO San José Juan Santamaria Intl
STLSJO
Lambert-St Louis
Fri 11/27
12:08 pm-10:15 pm
1 stop10h 07m
San José Juan Santamaria Intl
Wed 12/31
12:00 am-12:00 am
Nonstop0h 00m
$323
St. LouisSan José
STL Lambert-St Louis - SJO San José Juan Santamaria Intl
STLSJO
Lambert-St Louis
Thu 12/31
10:20 am-11:01 pm
1 stop12h 41m
San José Juan Santamaria Intl
Wed 12/31
12:00 am-12:00 am
Nonstop0h 00m
$334
St. LouisSan José
STL Lambert-St Louis - SJO San José Juan Santamaria Intl
STLSJO
Lambert-St Louis
Sun 1/3
5:20 am-8:39 pm
2 stops15h 19m
San José Juan Santamaria Intl
Wed 12/31
12:00 am-12:00 am
Nonstop0h 00m
$363
St. LouisLiberia
STL Lambert-St Louis - LIR Liberia
STLLIR
Lambert-St Louis
Fri 1/1
7:18 am-3:20 pm
1 stop8h 02m
Liberia
Wed 12/31
12:00 am-12:00 am
Nonstop0h 00m
$387
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-LIR
STL-SJO
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-LIR
STL-SJO
What is the cheapest month to book a flight from St. Louis to Costa Rica?
Currently, November is the cheapest month in which you can book a flight from St. Louis to Costa Rica (average of $507). Flying from St. Louis to Costa Rica in December is currently the most expensive (average of $904). 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.
How far ahead should I book a flight from St. Louis to Costa Rica?
Booking 13 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.
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 October 23, 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
Comfort
8.0
Crew
8.6
Boarding
8.1
Food
7.0
Entertainment
7.4
Reviews
1 / 20
8.0
ExcellentPatricia,Oct 2026
DAL - TPA
Overall
7.9
Comfort
8.0
Crew
8.6
Boarding
8.1
Food
7.0
Entertainment
7.4
Reviews
1 / 20
8.0
ExcellentPatricia,Oct 2026
DAL - TPA
Overall
7.9
Comfort
8.0
Crew
8.6
Boarding
8.1
Food
7.0
Entertainment
7.4
Reviews
1 / 20
8.0
ExcellentPatricia,Oct 2026
DAL - TPA
Overall
7.9
Comfort
8.0
Crew
8.6
Boarding
8.1
Food
7.0
Entertainment
7.4
Reviews
1 / 20
8.0
ExcellentPatricia,Oct 2026
DAL - TPA
Overall
7.9
Comfort
8.0
Crew
8.6
Boarding
8.1
Food
7.0
Entertainment
7.4
Reviews
1 / 20
8.0
ExcellentPatricia,Oct 2026
DAL - TPA
Overall
7.9
Comfort
8.0
Crew
8.6
Boarding
8.1
Food
7.0
Entertainment
7.4
Reviews
1 / 20
8.0
ExcellentPatricia,Oct 2026
DAL - TPA
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
See prices for flight routes from nearby airports that may be better suited for you.
Complete your trip
Complete your trip to Costa Rica by adding a car rental and/or hotel reservation to your travel itinerary.
Search flights from St. Louis to Costa Rica by cabin class
Find flights from St. Louis to Costa Rica, based on your preferred cabin class, be it economy, premium economy, business, or first class.
St. Louis and Costa Rica flights
Browse other St. Louis and Costa Rica flight options. Last updated on October 23, 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 7,457,451 searches. Data last updated October 23, 2026.
| Airline | Cheapest | Average | Flexibility | On-time |
|---|---|---|---|---|
| Cheapest$359 | Average$694 | FlexibilityNo cancel fee | On-timeN/A | |
| Cheapest$389 | Average$684 | FlexibilityNo cancel fee | On-time69% | |
| Cheapest$391 | Average$607 | FlexibilityNo cancel fee | On-time71% | |
| Cheapest$403 | Average$778 | FlexibilityNo cancel fee | On-time63% | |
| Cheapest$628 | Average$1,039 | FlexibilityNo cancel fee | On-time74% |