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$182+ 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 6/23. Fares are subject to change and may not be available on all flights or dates of travel.
STL — SJO
Apr 2 — Apr 91
Wed 4/2
Wed 4/9
1 adult, Economy
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Cheap 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 March 28, 2025.

Most accurate provider

FlightHub
3 stars

Most trusted provider

FlightHub
3 stars

Round-trip from

$342
(American Airlines)

One-way from

$182
(American Airlines)

Popular in

December

Cheapest in

September

Average price

$588
Provider with most accurate pricing for Lambert-St Louis-San José Juan Santamaria Intl flight deals.
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Provider most trusted by Cheapflights users for Lambert-St Louis-San José Juan Santamaria Intl flights.
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From Lambert-St Louis to Costa Rica
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One-way flight from Lambert-St Louis to Costa Rica
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Highest demand for flights based on searches. 13% potential increase in price ($96 potential increase over avg. RT price).
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Cheapest flight prices on average. 6% potential price decrease ($34 potential savings vs. average RT price).
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Average for round-trip flights in March 2025
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Find flight deals from St. Louis to Costa Rica

Cheapest flights from St. Louis to Costa Rica
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 March 28, 2025.

This American Airlines deal was found by Cheapflights users on 3/27. 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 6/107:20 amSTL - SJO
1 stop15h 44mAmerican Airlines
Wed 6/1811:59 pmSJO - STL
1 stop15h 40mAmerican Airlines
Deal found 3/27$342
This Delta deal was found by Cheapflights users on 3/27. 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 6/106:00 amSTL - SJO
1 stop7h 00mDelta
Sun 6/151:25 pmSJO - STL
1 stop9h 17mDelta
Deal found 3/27$362
This eDestinos deal was found by Cheapflights users on 3/27. 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 eDestinos is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Tue 4/226:10 pmSTL - SJO
1 stop6h 40mSpirit Airlines
Mon 4/2812:55 amSJO - STL
1 stop15h 20mSpirit Airlines
Deal found 3/27$365
This Kiwi.com deal was found by Cheapflights users on 3/27. 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 4/226:10 pmSTL - SJO
1 stop18h 08mMultiple Airlines
Tue 4/2911:35 amSJO - STL
1 stop11h 29mMultiple Airlines
Deal found 3/27$378
This American Airlines deal was found by Cheapflights users on 3/27. 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 6/117:20 amSTL - LIR
1 stop8h 20mAmerican Airlines
Wed 6/183:40 pmLIR - STL
1 stop16h 38mAmerican Airlines
Deal found 3/27$385
This United Airlines deal was found by Cheapflights users on 3/27. 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 6/115:55 pmSTL - SJO
1 stop17h 16mUnited Airlines
Thu 6/197:55 amSJO - STL
1 stop7h 58mUnited Airlines
Deal found 3/27$432
This United deal was found by Cheapflights users on 3/27. 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 is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Wed 5/285:55 pmSTL - LIR
1 stop17h 05mUnited Airlines
Sun 6/11:03 pmLIR - STL
1 stop8h 44mUnited Airlines
Deal found 3/27$558
This Copa Airlines deal was found by Cheapflights users on 3/27. 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.
Mon 6/28:10 amSTL - SJO
2 stops14h 43mCopa Airlines
Mon 6/95:52 amSJO - STL
2 stops15h 23mCopa Airlines
Deal found 3/27$570
This Southwest deal was found by Cheapflights users on 3/27. 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 6/127:05 amSTL - SJO
2 stops13h 35mSouthwest
Thu 6/198:45 amSJO - STL
2 stops11h 00mSouthwest
Deal found 3/27$650
This Alaska Airlines deal was found by Cheapflights users on 3/27. 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 Alaska Airlines is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Fri 4/253:08 pmSTL - SJO
2 stops57h 44mAlaska Airlines
Thu 5/11:12 amSJO - STL
2 stops21h 47mAlaska Airlines
Deal found 3/27$858
This Air Canada deal was found by Cheapflights users on 3/27. 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.
Thu 6/127:30 amSTL - SJO
1 stop16h 20mAir Canada
Fri 6/208:00 amSJO - STL
2 stops30h 30mAir Canada
Deal found 3/27$960

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 March 28, 2025.
Use the filters below to find and compare flights from St. Louis to Costa Rica that are best for you.

Fly from

St. Louis

Fly to

Costa Rica

Route

Depart

Return

Price

St. LouisSan José

STL - SJO

STLSJO

Lambert-St Louis

Tue 6/10

7:20 am-1:14 pm

1 stop6h 54m

San José Juan Santamaria Intl

Wed 6/18

11:59 pm-4:39 pm

1 stop15h 40m

$342

St. LouisSan José

STL - SJO

STLSJO

Lambert-St Louis

Tue 6/10

6:00 am-12:00 pm

1 stop7h 00m

San José Juan Santamaria Intl

Sun 6/15

1:25 pm-11:42 pm

1 stop9h 17m

$362

St. LouisSan José

STL - SJO

STLSJO

Lambert-St Louis

Tue 4/22

6:10 pm-11:50 pm

1 stop6h 40m

San José Juan Santamaria Intl

Mon 4/28

12:55 am-5:15 pm

1 stop15h 20m

$365

St. LouisSan José

STL - SJO

STLSJO

Lambert-St Louis

Tue 4/22

6:10 pm-11:18 am

1 stop18h 08m

San José Juan Santamaria Intl

Tue 4/29

11:35 am-12:04 am

1 stop11h 29m

$378

St. LouisLiberia

STL - LIR

STLLIR

Lambert-St Louis

Wed 6/11

7:20 am-2:40 pm

1 stop8h 20m

Liberia

Wed 6/18

3:40 pm-9:18 am

1 stop16h 38m

$385

St. LouisSan José

STL - SJO

STLSJO

Lambert-St Louis

Wed 6/11

5:55 pm-10:11 am

1 stop17h 16m

San José Juan Santamaria Intl

Thu 6/19

7:55 am-4:53 pm

1 stop7h 58m

$432

St. LouisLiberia

STL - LIR

STLLIR

Lambert-St Louis

Wed 5/28

5:55 pm-10:00 am

1 stop17h 05m

Liberia

Sun 6/1

1:03 pm-10:47 pm

1 stop8h 44m

$558

St. LouisSan José

STL - SJO

STLSJO

Lambert-St Louis

Mon 6/2

8:10 am-9:53 pm

2 stops14h 43m

San José Juan Santamaria Intl

Mon 6/9

5:52 am-10:15 pm

2 stops15h 23m

$570

St. LouisSan José

STL - SJO

STLSJO

Lambert-St Louis

Thu 6/12

7:05 am-7:40 pm

2 stops13h 35m

San José Juan Santamaria Intl

Thu 6/19

8:45 am-8:45 pm

2 stops11h 00m

$650

St. LouisSan José

STL - SJO

STLSJO

Lambert-St Louis

Fri 4/25

3:08 pm-11:52 pm

2 stops57h 44m

San José Juan Santamaria Intl

Thu 5/1

1:12 am-11:59 pm

2 stops21h 47m

$858

Flights are sorted by cheapest round-trip flights first.

Deals found on 3/27

Showing 1-10 of 13 results
1
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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.
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

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

Currently, September is the cheapest month in which you can book a flight from St. Louis to Costa Rica (average of $398). Flying from St. Louis to Costa Rica in March is currently the most expensive (average of $555). 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.

What is the cheapest time of day to fly from STL to CR?

Find hourly flight availability from St. Louis to Costa Rica. Discover flight options and departure times throughout the day, allowing you to choose a departure time that suits your schedule. Data last updated March 28, 2025.

When flying from St. Louis to Costa Rica, the time of day you decide to fly out makes little to no difference towards the overall price you’ll pay on tickets.

Rainfall in Costa Rica by month

Plan your trip to Costa Rica by taking into account the average rainfall totals by month.

In terms of precipitation, rainfall in Costa Rica ranges from 0.0 - 11.8 inches per month. September is typically the wettest month, when rainfall can reach 11.8 in. February is typically the driest time to visit Costa Rica when rainfall is around 0.0 in.

Temperature in Costa Rica by month

Plan your trip to Costa Rica by taking into account the average temperature totals by month.

If weather is an important factor for your trip to Costa Rica, use this chart to help with planning. For those seeking warmer temperatures, April is the ideal time of year to visit, when temperatures reach an average of 69.8 F. Travelers looking to avoid the cold should look outside of January, when temperatures are typically at their lowest (around 64.4 F).

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 March 28, 2025.
Read reviews from past customers who have flown Southwest, Alaska Airlines and Delta from St. Louis to Costa Rica. You can also see how each airline stacks up in terms of entertainment options, comfort, food, crew/service, and boarding process.
Southwest
8.1
Very good
4,273 reviews

Entertainment

7.6

Overall

8.1

Food

7.1

Comfort

8.1

Boarding

8.2

Crew

8.6

Reviews

1 / 20
8.0
Excellent

Ila,Mar 2025

HOU - DAL

Our original flight was delayed. We were able to change our flight and got home at close to the same time. Looking forward to when you have assigned seating.
Southwest
8.1
Very good
4,273 reviews
Southwest
8.1
Very good
4,273 reviews

Entertainment

7.6

Overall

8.1

Food

7.1

Comfort

8.1

Boarding

8.2

Crew

8.6

Reviews

1 / 20
8.0
Excellent

Ila,Mar 2025

HOU - DAL

Our original flight was delayed. We were able to change our flight and got home at close to the same time. Looking forward to when you have assigned seating.
Alaska Airlines
8.0
Very good
9,798 reviews
Southwest
8.1
Very good
4,273 reviews

Entertainment

7.6

Overall

8.1

Food

7.1

Comfort

8.1

Boarding

8.2

Crew

8.6

Reviews

1 / 20
8.0
Excellent

Ila,Mar 2025

HOU - DAL

Our original flight was delayed. We were able to change our flight and got home at close to the same time. Looking forward to when you have assigned seating.
Delta
8.0
Very good
7,896 reviews
Southwest
8.1
Very good
4,273 reviews

Entertainment

7.6

Overall

8.1

Food

7.1

Comfort

8.1

Boarding

8.2

Crew

8.6

Reviews

1 / 20
8.0
Excellent

Ila,Mar 2025

HOU - DAL

Our original flight was delayed. We were able to change our flight and got home at close to the same time. Looking forward to when you have assigned seating.
Copa Airlines
7.5
Good
1,395 reviews
Southwest
8.1
Very good
4,273 reviews

Entertainment

7.6

Overall

8.1

Food

7.1

Comfort

8.1

Boarding

8.2

Crew

8.6

Reviews

1 / 20
8.0
Excellent

Ila,Mar 2025

HOU - DAL

Our original flight was delayed. We were able to change our flight and got home at close to the same time. Looking forward to when you have assigned seating.
United Airlines
7.4
Good
8,603 reviews
Southwest
8.1
Very good
4,273 reviews

Entertainment

7.6

Overall

8.1

Food

7.1

Comfort

8.1

Boarding

8.2

Crew

8.6

Reviews

1 / 20
8.0
Excellent

Ila,Mar 2025

HOU - DAL

Our original flight was delayed. We were able to change our flight and got home at close to the same time. Looking forward to when you have assigned seating.

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.

  • What airport do you fly from for flights from St. Louis to Costa Rica?

    If you book a flight to Costa Rica from St. Louis, you will be flying from 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.

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

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

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

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

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

    Yes. Cheapflights offers flight deals from St. Louis to Costa Rica 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 St. Louis to Costa Rica?

    Currently, September is the cheapest month in which you can book a flight from St. Louis to Costa Rica (average of $398). Flying from St. Louis to Costa Rica in March is currently the most expensive (average of $555). 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

Browse thousands of different options on Cheapflights for your next trip

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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.
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Kansas City to Managua flights
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Columbia to Liberia flights
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Kansas City to Tegucigalpa flights

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 March 28, 2025.
AirlineCheapestAverageFlexibilityOn-time
Spirit AirlinesCheapest$246Average$316FlexibilityNo cancel feeOn-time65%
United AirlinesCheapest$389Average$614FlexibilityNo cancel feeOn-time69%
American AirlinesCheapest$391Average$594FlexibilityNo cancel feeOn-time71%
DeltaCheapest$398Average$628FlexibilityNo cancel feeOn-timeN/A
SouthwestCheapest$443Average$710FlexibilityNo cancel feeOn-time63%
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