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Cheap flights from Costa Rica to St. Louis from $307

This is the cheapest one-way flight price found by a momondo user in the last 72 hours by searching for a flight from Costa Rica to St. Louis departing on 8/12. Fares may change, and may not be available for all flights or travel dates. Click the price to refresh the search for this deal.
1 adult
0 bags

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Find the cheapest flights from Costa Rica to St. Louis

Recent round-trip flight deals from Costa Rica to St. Louis

Enter your travel dates to find the best prices.
United Airlines Logo
7:45 am - 4:35 pm
SJO
-
STL
7h 50m
1 stop
United Airlines Logo
6:15 am - 1:15 pm
STL
-
SJO
7h 00m
1 stop
$426United Airlines
Sat, Oct 31 - Mon, Nov 2
United Airlines Logo
7:45 am - 4:35 pm
SJO
-
STL
7h 50m
1 stop
United Airlines Logo
8:15 pm - 1:15 pm
STL
-
SJO
17h 00m
2 stops
$430United Airlines
Sat, Oct 31 - Mon, Nov 2
Multiple Airlines Logo
7:07 am - 11:59 pm
SJO
-
STL
15h 52m
1 stop
Multiple Airlines Logo
4:09 pm - 8:20 am
STL
-
SJO
17h 11m
1 stop
$489Multiple Airlines
Wed, Jul 22 - Wed, Jul 29
Frontier Logo
9:35 am - 11:57 pm
SJO
-
STL
13h 22m
1 stop
Frontier Logo
6:33 pm - 8:20 am
STL
-
SJO
38h 47m
2 stops
$494Frontier
Thu, Jun 4 - Thu, Jul 30
Multiple Airlines Logo
7:07 am - 5:37 pm
SJO
-
STL
33h 30m
2 stops
Multiple Airlines Logo
4:09 pm - 8:20 am
STL
-
SJO
17h 11m
1 stop
$496Multiple Airlines
Wed, Jul 22 - Wed, Jul 29
United Airlines Logo
1:25 pm - 4:26 pm
SJO
-
STL
26h 01m
2 stops
United Airlines Logo
6:15 am - 7:37 pm
STL
-
SJO
14h 22m
1 stop
$497United Airlines
Fri, Sep 25 - Wed, Sep 30
American Airlines Logo
2:52 pm - 9:32 am
SJO
-
STL
17h 40m
2 stops
American Airlines Logo
5:42 am - 1:52 pm
STL
-
SJO
9h 10m
1 stop
$511American Airlines
Tue, Aug 18 - Tue, Aug 25
United Airlines Logo
1:25 pm - 8:37 am
SJO
-
STL
18h 12m
2 stops
United Airlines Logo
1:27 pm - 12:21 pm
STL
-
SJO
23h 54m
2 stops
$518United Airlines
Wed, Oct 7 - Sat, Oct 10
American Airlines Logo
11:59 pm - 6:30 pm
SJO
-
STL
17h 31m
1 stop
American Airlines Logo
5:29 am - 10:38 pm
STL
-
SJO
18h 09m
1 stop
$527American Airlines
Thu, Jun 4 - Thu, Jul 30
American Airlines Logo
1:05 pm - 8:03 am
SJO
-
STL
17h 58m
2 stops
American Airlines Logo
6:28 pm - 11:05 am
STL
-
SJO
17h 37m
2 stops
$532American Airlines
Sat, Oct 10 - Sat, Oct 24

Southwest flights from Costa Rica to St. Louis

Our best Southwest deals on Costa Rica to St. Louis flight tickets
Southwest
Aug 17
SJO9:00 amSan José Juan Santamaria Intl
9h 55m
2 stops
STL7:55 pmLambert-St Louis
Aug 23
STL8:20 amLambert-St Louis
11h 20m
2 stops
SJO6:40 pmSan José Juan Santamaria Intl
$608
Southwest
May 13
SJO9:00 amSan José Juan Santamaria Intl
9h 55m
1 stop
STL7:55 pmLambert-St Louis
May 20
STL10:25 amLambert-St Louis
9h 35m
2 stops
SJO7:00 pmSan José Juan Santamaria Intl
$670
Southwest
May 13
SJO9:00 amSan José Juan Santamaria Intl
11h 05m
2 stops
STL9:05 pmLambert-St Louis
May 20
STL10:25 amLambert-St Louis
9h 35m
2 stops
SJO7:00 pmSan José Juan Santamaria Intl
$674

American Airlines flights from Costa Rica to St. Louis

Our best American Airlines deals on Costa Rica to St. Louis flight tickets
American Airlines
Aug 18
SJO2:52 pmSan José Juan Santamaria Intl
17h 40m
2 stops
STL9:32 amLambert-St Louis
Aug 25
STL5:42 amLambert-St Louis
9h 10m
1 stop
SJO1:52 pmSan José Juan Santamaria Intl
$511
American Airlines
Jun 4
SJO11:59 pmSan José Juan Santamaria Intl
17h 31m
1 stop
STL6:30 pmLambert-St Louis
Jul 30
STL5:29 amLambert-St Louis
18h 09m
1 stop
SJO10:38 pmSan José Juan Santamaria Intl
$527
American Airlines
Oct 10
SJO1:05 pmSan José Juan Santamaria Intl
17h 58m
2 stops
STL8:03 amLambert-St Louis
Oct 24
STL6:28 pmLambert-St Louis
17h 37m
2 stops
SJO11:05 amSan José Juan Santamaria Intl
$532

momondo 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, momondo users made 832,500 searches. Data last updated May 11, 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
Quickest round-trip

San JoséSt. Louis

SJO - STL

SJOSTL

San José Juan Santamaria Intl

Sat 10/31

7:45 am-4:35 pm

1 stop7h 50m

Lambert-St Louis

Mon 11/2

6:15 am-1:15 pm

1 stop7h 00m

$426

San JoséSt. Louis

SJO - STL

SJOSTL

San José Juan Santamaria Intl

Sat 10/31

7:45 am-4:35 pm

1 stop7h 50m

Lambert-St Louis

Mon 11/2

8:15 pm-1:15 pm

2 stops17h 00m

$430

San JoséSt. Louis

SJO - STL

SJOSTL

San José Juan Santamaria Intl

Wed 7/22

7:07 am-11:59 pm

1 stop15h 52m

Lambert-St Louis

Wed 7/29

4:09 pm-8:20 am

1 stop17h 11m

$489

San JoséSt. Louis

SJO - STL

SJOSTL

San José Juan Santamaria Intl

Thu 6/4

9:35 am-11:57 pm

1 stop13h 22m

Lambert-St Louis

Thu 7/30

6:33 pm-8:20 am

2 stops38h 47m

$494

San JoséSt. Louis

SJO - STL

SJOSTL

San José Juan Santamaria Intl

Wed 7/22

7:07 am-5:37 pm

2 stops33h 30m

Lambert-St Louis

Wed 7/29

4:09 pm-8:20 am

1 stop17h 11m

$496

San JoséSt. Louis

SJO - STL

SJOSTL

San José Juan Santamaria Intl

Fri 9/25

1:25 pm-4:26 pm

2 stops26h 01m

Lambert-St Louis

Wed 9/30

6:15 am-7:37 pm

1 stop14h 22m

$497

San JoséSt. Louis

SJO - STL

SJOSTL

San José Juan Santamaria Intl

Tue 8/18

2:52 pm-9:32 am

2 stops17h 40m

Lambert-St Louis

Tue 8/25

5:42 am-1:52 pm

1 stop9h 10m

$511

San JoséSt. Louis

SJO - STL

SJOSTL

San José Juan Santamaria Intl

Wed 10/7

1:25 pm-8:37 am

2 stops18h 12m

Lambert-St Louis

Sat 10/10

1:27 pm-12:21 pm

2 stops23h 54m

$518

San JoséSt. Louis

SJO - STL

SJOSTL

San José Juan Santamaria Intl

Thu 6/4

11:59 pm-6:30 pm

1 stop17h 31m

Lambert-St Louis

Thu 7/30

5:29 am-10:38 pm

1 stop18h 09m

$527

San JoséSt. Louis

SJO - STL

SJOSTL

San José Juan Santamaria Intl

Sat 10/10

1:05 pm-8:03 am

2 stops17h 58m

Lambert-St Louis

Sat 10/24

6:28 pm-11:05 am

2 stops17h 37m

$532

Flights are sorted by cheapest round-trip flights first.

Showing 1-10 of 20 resultsSorted by cheapest first
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See travel insights to St. Louis from

How to get the cheapest flight ticket from Costa Rica to St. Louis

Look no further. We've gone through all the searches for this route on momondo so you have the important information and insights to find the cheapest flight ticket for your trip

What is the cheapest month to fly to St. Louis?

In general, November is the cheapest month to fly from Costa Rica to St. Louis. Due to it being the ‘off-season’ during this time, you can expect flight prices to be around $186. The month of July is another great option to travel to St. Louis, with average flight prices from Costa Rica averaging around $192.

Can stopping save me money on Costa Rica to St. Louis flights?

You could potentially save up to 28% on your flight if you consider stops on a Costa Rica to St. Louis flight.

Cheap Costa Rica to St. Louis flight deals and tips

Find info about flight duration, direct flights, and airports for your flight from Costa Rica to St. Louis

Fastest flight time

12h 37m

Direct flights

None
The fastest flight from Costa Rica to St. Louis takes 12h 37m
There are no direct flights from Costa Rica to St. Louis. There are no popular flight routes from Costa Rica to St. Louis.
Search flight deals

Frequently asked questions about flying from Costa Rica to St. Louis

  • When did momondo last update prices for flights from Costa Rica to Lambert-St Louis Airport?

    Prices for flights from Costa Rica to Lambert-St Louis Airport were last updated today.

  • How many operators does momondo search for flights from Costa Rica to Lambert-St Louis Airport?

  • How old do you have to be to fly from Costa Rica to Lambert-St Louis Airport?

    Although the minimum age for a child to fly alone is five, airlines that offer an unaccompanied minor (UMNR) service may have their own age limits, which could be impacted by factors such as flight length, timing, and layovers. It is recommended that you verify with the airline you are booking with for travel from Costa Rica to Lambert-St Louis Airport.

  • What documentation or ID do you need to fly to Lambert-St Louis Airport?

    The necessary travel and health documents for your Lambert-St Louis Airport trip may vary depending on your travel plans and individual circumstances. Generally, you should have various documents, such as a national ID card or driver's license and a passport that is valid for six months beyond your scheduled arrival date. We recommend seeking advice from your airline or a trusted third party, such as IATA.

Best airlines flying from Costa Rica to St. Louis

Compare and see reviews for airlines that fly from Costa Rica to St. Louis with momondo
Airline
Rating
Free Cancellation
Price
American AirlinesPriceFrom $274Free CancellationRating
7.1
11,667 reviews
Search American Airlines flights
United AirlinesPriceFrom $328Free CancellationRating
7.4
9,699 reviews
Search United Airlines flights

Traveling to a place near St. Louis?

Book flights to St. Louis if you plan to visit one of these locations
St. Charles
Chesterfield
Hermann
Fairview Heights
Maryland Heights
O'Fallon
Florissant
St. Peters
Collinsville
Wentzville
Alton
Fenton
Farmington
Festus
Clayton
Eureka
Litchfield
Edwardsville
Shrewsbury
Grafton

Why use momondo?

Why should I use momondo to find a flight deal from Costa Rica to St. Louis?

momondo compares prices from hundreds of airlines and agents so you can find and book the best deal on flights from Costa Rica to St. Louis. Millions of users trust and use momondo every year so you are in good hands.

Can I find flights from Costa Rica to St. Louis with flexible booking policies on momondo?

Yes. momondo allows you to filter the results for Costa Rica to St. Louis flights to just show those with flexible booking policies.

How can momondo help me find flights from Costa Rica to St. Louis?

momondo provides multiple filters to help you find the best flight to St. Louis from Costa Rica. Filter by price, airline, airports, cabin, aircraft, payment method, number of stops and more.

I’m not ready to book a flight from Costa Rica to St. Louis right now. Can momondo alert me if prices change?

Yes. momondo can track prices for Costa Rica to St. Louis flights and alert you when they change. Perform a search to set up the price alert. All that is required is a valid email address.

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