St. Louis

$140+ Cheap flights from Costa Rica to St. Louis (STL)

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 4/11. Fares are subject to change and may not be available on all flights or dates of travel.
SJO — STL
Apr 29 — May 61
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Cheap flight deals from Costa Rica to St. Louis

Cheapest flights from Costa Rica to St. Louis
Explore the most affordable flight options available from Costa Rica to St. Louis. Find the lowest fares from popular airlines and budget airlines, with prices last updated on March 30, 2026.

This American Airlines deal was found by Cheapflights users on 3/25. 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 5/136:30 am
SJO
-
STL
2 stops14h 49m
American Airlines
Tue 6/26:12 pm
STL
-
SJO
2 stops18h 38m
American Airlines
Deal found 3/25$342
This American Airlines deal was found by Cheapflights users on 3/25. 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 5/126:30 am
SJO
-
STL
1 stop14h 54m
American Airlines
Tue 6/26:12 pm
STL
-
SJO
2 stops19h 57m
American Airlines
Deal found 3/25$348
This American Airlines deal was found by Cheapflights users on 3/25. 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 5/136:30 am
SJO
-
STL
1 stop14h 54m
American Airlines
Thu 5/289:41 am
STL
-
SJO
1 stop14h 01m
American Airlines
Deal found 3/25$356
This United Airlines deal was found by Cheapflights users on 3/26. 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 5/167:55 am
SJO
-
STL
1 stop13h 35m
United Airlines
Wed 6/38:35 am
STL
-
SJO
1 stop12h 02m
United Airlines
Deal found 3/26$375
This United Airlines deal was found by Cheapflights users on 3/26. 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 5/137:55 am
SJO
-
STL
1 stop13h 35m
United Airlines
Tue 6/28:35 am
STL
-
SJO
1 stop26h 36m
United Airlines
Deal found 3/26$391
This BusinessClass deal was found by Cheapflights users on 3/25. 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 BusinessClass is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Thu 4/1612:10 pm
SJO
-
STL
2 stops19h 20m
GOL
Tue 4/215:24 am
STL
-
SJO
1 stop6h 43m
GOL
Deal found 3/25$407
This United Airlines deal was found by Cheapflights users on 3/28. 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 5/147:55 am
SJO
-
STL
2 stops23h 44m
United Airlines
Wed 6/31:13 pm
STL
-
SJO
2 stops21h 58m
United Airlines
Deal found 3/28$413
This American Airlines deal was found by Cheapflights users on 3/25. 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 4/166:30 am
SJO
-
STL
1 stop14h 54m
American Airlines
Tue 4/2111:06 am
STL
-
SJO
1 stop9h 01m
American Airlines
Deal found 3/25$418

Find flight deals from Costa Rica to St. Louis

Keep the following information in mind while searching for Costa Rica to St. Louis flight deals. Data was last updated March 30, 2026.

Most accurate provider

FlightHub
3 stars

Most trusted provider

FlightHub
3 stars

Round-trip from

$342
(American Airlines)

One-way from

$140
(Frontier)

Popular in

January

Cheapest in

October

Average price

$531
Provider with most accurate pricing for San José Juan Santamaria Intl-Lambert-St Louis flight deals.
Provider most trusted by Cheapflights users for San José Juan Santamaria Intl-Lambert-St Louis flights.
From Costa Rica to Lambert-St Louis
One-way flight from Costa Rica to Lambert-St Louis
Highest demand for flights based on searches. 10% potential increase in price ($51 potential increase over avg. RT price).
Cheapest flight prices on average. 4% potential price decrease ($23 potential savings vs. average RT price).
Average for round-trip flights in March 2026

Cheapflights Fare Finder

 
Customize your flight search to find flights from Costa Rica to St. Louis 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 March 30, 2026.
Use the filters below to find and compare flights from Costa Rica to St. Louis that are best for you.

Fly from

Fly to

Route

Depart

Return

Price

Cheapest round-trip

San JoséSt. Louis

SJO - STL

SJOSTL

San José Juan Santamaria Intl

Thu 4/16

12:10 pm-8:30 am

2 stops19h 20m

Lambert-St Louis

Tue 4/21

5:24 am-11:07 am

1 stop6h 43m

$407

San JoséSt. Louis

SJO - STL

SJOSTL

San José Juan Santamaria Intl

Thu 5/14

1:25 pm-9:30 am

1 stop19h 05m

Lambert-St Louis

Wed 6/3

1:13 pm-10:11 am

2 stops21h 58m

$413

San JoséSt. Louis

SJO - STL

SJOSTL

San José Juan Santamaria Intl

Wed 5/13

1:25 pm-9:13 pm

2 stops30h 48m

Lambert-St Louis

Tue 6/2

1:13 pm-10:11 am

2 stops21h 58m

$426

San JoséSt. Louis

SJO - STL

SJOSTL

San José Juan Santamaria Intl

Fri 5/8

12:44 pm-12:47 pm

2 stops23h 03m

Lambert-St Louis

Tue 5/12

6:00 am-12:21 pm

1 stop7h 21m

$456

San JoséSt. Louis

SJO - STL

SJOSTL

San José Juan Santamaria Intl

Sat 5/16

7:55 am-8:39 am

2 stops23h 44m

Lambert-St Louis

Wed 6/3

5:41 pm-10:11 am

2 stops17h 30m

$456

San JoséSt. Louis

SJO - STL

SJOSTL

San José Juan Santamaria Intl

Fri 9/18

7:00 am-11:12 pm

1 stop15h 12m

Lambert-St Louis

Sat 9/26

3:33 pm-1:58 pm

1 stop23h 25m

$480
Quickest round-trip

San JoséSt. Louis

SJO - STL

SJOSTL

San José Juan Santamaria Intl

Wed 5/13

1:20 pm-11:59 pm

1 stop9h 39m

Lambert-St Louis

Thu 5/28

6:00 am-11:52 am

1 stop6h 52m

$497
Cheapest one-way

San JoséSt. Louis

SJO - STL

SJOSTL

San José Juan Santamaria Intl

Sun 6/28

9:35 am-12:14 am

1 stop13h 39m

$204

San JoséSt. Louis

SJO - STL

SJOSTL

San José Juan Santamaria Intl

Wed 6/24

7:55 am-8:41 am

2 stops23h 46m

$219

San JoséSt. Louis

SJO - STL

SJOSTL

San José Juan Santamaria Intl

Thu 4/9

11:38 am-7:51 am

1 stop19h 13m

$244

Flights are sorted by cheapest round-trip flights first.

Deals found on 3/28

Showing 1-10 of 14 resultsSorted by cheapest first
1
2

Best time to book a flight from Costa Rica to St. Louis

Have a flexible travel schedule? Discover the best time to fly to St. Louis from Costa Rica with our price prediction graph.
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 Costa Rica to St. Louis

What is the cheapest month to book a flight from Costa Rica to St. Louis?

Currently, April is the cheapest month in which you can book a flight from Costa Rica to St. Louis (average of $220). Flying from Costa Rica to St. Louis in January is currently the most expensive (average of $573). 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 St. Louis

Get insights into the airlines that provide service to St. Louis. 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 St. Louis. Reviews last updated March 30, 2026.
See what other customers who have flown with United Airlines and American Airlines from Costa Rica to St. Louis have to say. You can also see how each airline compares in terms of entertainment options, comfort, food, crew/service, and boarding process.

Crew

8.1

Comfort

7.3

Boarding

7.7

Food

6.6

Entertainment

7.1

Overall

7.4

Reviews

1 / 20
6.0
Good

Gerry,Jan 2026

YVR - DEN

Seats were uncomfortable. Second leg of my flight on United had much more comfortable seats

Crew

8.1

Comfort

7.3

Boarding

7.7

Food

6.6

Entertainment

7.1

Overall

7.4

Reviews

1 / 20
6.0
Good

Gerry,Jan 2026

YVR - DEN

Seats were uncomfortable. Second leg of my flight on United had much more comfortable seats

Crew

8.1

Comfort

7.3

Boarding

7.7

Food

6.6

Entertainment

7.1

Overall

7.4

Reviews

1 / 20
6.0
Good

Gerry,Jan 2026

YVR - DEN

Seats were uncomfortable. Second leg of my flight on United had much more comfortable seats

Related info for your journey

Find useful and relevant information for your journey from Costa Rica to St. Louis. Access travel guides, tips, and recommendations to enhance your travel experience. Get information about local attractions, weather, transportation options, and more.
  • What airport do you fly into for flights to St. Louis from Costa Rica?

    If you book a flight to St. Louis from Costa Rica, you will be flying to Lambert-St Louis, which is the city’s only airport. Lambert-St Louis (STL) is located 12.7 mi from the center of St. Louis.

  • How long is the flight from Costa Rica to St. Louis?

    Departing from Costa Rica to St. Louis will take you 19h 05m. Airlines will cover a distance of 2022 mi. Both multi-stop and nonstop flights can be found to your destination and back.

  • Can I find deals for flights from Costa Rica to St. Louis that include hotel bookings?

    Yes. In addition to deals on Costa Rica to St. Louis flights, Cheapflights offers vacation packages that include both flights and hotel.

  • How can I find direct flights from Costa Rica to St. Louis?

    After entering your origin and destination, apply the non-stop filter on the search result page to find direct flights from Costa Rica to St. Louis.

  • Can I find deals for business class flights from Costa Rica to St. Louis?

    Yes. Cheapflights offers flight deals from Costa Rica to St. Louis by cabin class. In addition to browsing deals, you can also filter by cabin class on the search results page after making a search.

  • What is the cheapest month to book a flight from Costa Rica to St. Louis?

    Currently, April is the cheapest month in which you can book a flight from Costa Rica to St. Louis (average of $220). Flying from Costa Rica to St. Louis in January is currently the most expensive (average of $573). 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.

See more FAQs

Traveling to a place near St. Louis?

Book flights to St. Louis if you plan to visit one of these locations
Edwardsville
O'Fallon
Fenton
Swansea
Fairview Heights
Maryland Heights
Collinsville
Eureka
Wentzville
Glencoe
Chesterfield
Alton
Farmington
Festus

Browse thousands of different options on Cheapflights for your next trip

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Top 2 airlines flying from Costa Rica to St. Louis

Discover the top 2 airlines that operate flights from Costa Rica to St. Louis. 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 March 30, 2026.
AirlineCheapestAverageFlexibilityOn-time
American AirlinesCheapest$274Average$473FlexibilityNo cancel feeOn-time71%
United AirlinesCheapest$306Average$418FlexibilityNo cancel feeOn-time69%

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