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Cheap flights from Costa Rica to St. Louis from $298

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 9/29. 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
1 adult, Economy, 0 bags

Discover deals from 900+ travel sites with momondo.

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
7:55 am - 10:30 pmSJO  San José Juan Santamaria Intl-STL Lambert-St Louis
13h 35m1 stop Houston George Bush Intcntl
United Airlines Logo
6:15 am - 7:37 pmSTL  Lambert-St Louis-SJO San José Juan Santamaria Intl
14h 22m1 stop Houston George Bush Intcntl
$536United Airlines
Thu, Oct 15 - Mon, Oct 19
United Airlines Logo
7:55 am - 10:30 pmSJO  San José Juan Santamaria Intl-STL Lambert-St Louis
13h 35m1 stop Houston George Bush Intcntl
United Airlines Logo
6:15 am - 12:21 pmSTL  Lambert-St Louis-SJO San José Juan Santamaria Intl
7h 06m1 stop Houston George Bush Intcntl
$536United Airlines
Fri, Oct 9 - Mon, Oct 12
United Airlines Logo
1:25 pm - 12:13 pmSJO  San José Juan Santamaria Intl-STL Lambert-St Louis
21h 48m2 stops Houston George Bush Intcntl Chicago O'Hare Intl
United Airlines Logo
6:15 am - 12:21 pmSTL  Lambert-St Louis-SJO San José Juan Santamaria Intl
7h 06m1 stop Houston George Bush Intcntl
$536United Airlines
Thu, Oct 15 - Mon, Oct 19
American Airlines Logo
2:57 pm - 10:18 amSJO  San José Juan Santamaria Intl-STL Lambert-St Louis
18h 21m2 stops Miami Chicago O'Hare Intl
American Airlines Logo
6:00 am - 8:07 pmSTL  Lambert-St Louis-SJO San José Juan Santamaria Intl
15h 07m2 stops New York LaGuardia Miami
$540American Airlines
Tue, Sep 15 - Wed, Sep 23
American Airlines Logo
2:57 pm - 10:18 amSJO  San José Juan Santamaria Intl-STL Lambert-St Louis
18h 21m2 stops Miami Chicago O'Hare Intl
American Airlines Logo
5:00 am - 8:07 pmSTL  Lambert-St Louis-SJO San José Juan Santamaria Intl
16h 07m1 stop Miami
$540American Airlines
Tue, Sep 15 - Wed, Sep 23
United Airlines Logo
1:25 pm - 10:48 amSJO  San José Juan Santamaria Intl-STL Lambert-St Louis
20h 23m2 stops Houston George Bush Intcntl Chicago O'Hare Intl
United Airlines Logo
6:15 am - 12:21 pmSTL  Lambert-St Louis-SJO San José Juan Santamaria Intl
7h 06m1 stop Houston George Bush Intcntl
$540United Airlines
Fri, Oct 9 - Mon, Oct 12
Air Canada Logo
7:10 am - 8:00 pmSJO  San José Juan Santamaria Intl-STL Lambert-St Louis
11h 50m1 stop Toronto Pearson Intl
Air Canada Logo
12:10 pm - 8:20 pmSTL  Lambert-St Louis-SJO San José Juan Santamaria Intl
9h 10m1 stop Montreal Pierre Elliott Trudeau Intl
$548Air Canada
Fri, Oct 16 - Wed, Oct 21
Air Canada Logo
7:10 am - 2:00 pmSJO  San José Juan Santamaria Intl-STL Lambert-St Louis
29h 50m1 stop Toronto Pearson Intl
Air Canada Logo
12:10 pm - 10:00 pmSTL  Lambert-St Louis-SJO San José Juan Santamaria Intl
34h 50m2 stops Montreal Pierre Elliott Trudeau Intl Toronto Pearson Intl
$557Air Canada
Fri, Oct 16 - Wed, Oct 21
Multiple Airlines Logo
7:07 am - 7:39 pmSJO  San José Juan Santamaria Intl-STL Lambert-St Louis
11h 32m1 stop Orlando
Multiple Airlines Logo
10:35 am - 3:11 pmSTL  Lambert-St Louis-SJO San José Juan Santamaria Intl
29h 36m2 stops Atlanta Hartsfield-Jackson Orlando
$562Multiple Airlines
Fri, Oct 16 - Mon, Oct 19
American Airlines Logo
6:00 am - 9:49 pmSJO  San José Juan Santamaria Intl-STL Lambert-St Louis
14h 49m1 stop Miami
American Airlines Logo
5:00 am - 8:07 pmSTL  Lambert-St Louis-SJO San José Juan Santamaria Intl
16h 07m1 stop Miami
$612American Airlines
Tue, Sep 15 - Wed, Sep 23

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JetBlue flights from Costa Rica to St. Louis

Our best JetBlue deals on Costa Rica to St. Louis flight tickets
JetBlue
Dec 21
SJO3:25 pmSan José Juan Santamaria Intl
21h 00m
1 stop
STL12:25 pmLambert-St Louis
Dec 28
STL5:00 amLambert-St Louis
8h 15m
1 stop
SJO1:15 pmSan José Juan Santamaria Intl
$797
JetBlue
Dec 21
SJO7:00 amSan José Juan Santamaria Intl
8h 58m
1 stop
STL3:58 pmLambert-St Louis
Dec 28
STL11:51 amLambert-St Louis
10h 24m
1 stop
SJO10:15 pmSan José Juan Santamaria Intl
$865

American Airlines flights from Costa Rica to St. Louis

Our best American Airlines deals on Costa Rica to St. Louis flight tickets
American Airlines
Sep 15
SJO6:00 amSan José Juan Santamaria Intl
17h 27m
2 stops
STL12:27 amLambert-St Louis
Sep 23
STL5:00 amLambert-St Louis
16h 07m
1 stop
SJO8:07 pmSan José Juan Santamaria Intl
$616
American Airlines
Dec 23
SJO12:34 amSan José Juan Santamaria Intl
16h 36m
1 stop
STL5:10 pmLambert-St Louis
Dec 31
STL5:05 amLambert-St Louis
7h 28m
1 stop
SJO12:33 pmSan José Juan Santamaria Intl
$643
American Airlines
Dec 24
SJO1:50 pmSan José Juan Santamaria Intl
21h 19m
1 stop
STL11:09 amLambert-St Louis
Dec 31
STL5:05 amLambert-St Louis
7h 28m
1 stop
SJO12:33 pmSan José Juan Santamaria Intl
$644

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 August 9, 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 San José Juan Santamaria Intl - STL Lambert-St Louis

SJOSTL

San José Juan Santamaria Intl

Thu 10/15

7:55 am-10:30 pm

1 stop13h 35m

Lambert-St Louis

Mon 10/19

6:15 am-7:37 pm

1 stop14h 22m

$536
Quickest round-trip

San JoséSt. Louis

SJO San José Juan Santamaria Intl - STL Lambert-St Louis

SJOSTL

San José Juan Santamaria Intl

Fri 10/9

7:55 am-10:30 pm

1 stop13h 35m

Lambert-St Louis

Mon 10/12

6:15 am-12:21 pm

1 stop7h 06m

$536

San JoséSt. Louis

SJO San José Juan Santamaria Intl - STL Lambert-St Louis

SJOSTL

San José Juan Santamaria Intl

Thu 10/15

1:25 pm-12:13 pm

2 stops21h 48m

Lambert-St Louis

Mon 10/19

6:15 am-12:21 pm

1 stop7h 06m

$536

San JoséSt. Louis

SJO San José Juan Santamaria Intl - STL Lambert-St Louis

SJOSTL

San José Juan Santamaria Intl

Tue 9/15

2:57 pm-10:18 am

2 stops18h 21m

Lambert-St Louis

Wed 9/23

6:00 am-8:07 pm

2 stops15h 07m

$540

San JoséSt. Louis

SJO San José Juan Santamaria Intl - STL Lambert-St Louis

SJOSTL

San José Juan Santamaria Intl

Tue 9/15

2:57 pm-10:18 am

2 stops18h 21m

Lambert-St Louis

Wed 9/23

5:00 am-8:07 pm

1 stop16h 07m

$540

San JoséSt. Louis

SJO San José Juan Santamaria Intl - STL Lambert-St Louis

SJOSTL

San José Juan Santamaria Intl

Fri 10/9

1:25 pm-10:48 am

2 stops20h 23m

Lambert-St Louis

Mon 10/12

6:15 am-12:21 pm

1 stop7h 06m

$540

San JoséSt. Louis

SJO San José Juan Santamaria Intl - STL Lambert-St Louis

SJOSTL

San José Juan Santamaria Intl

Fri 10/16

7:10 am-8:00 pm

1 stop11h 50m

Lambert-St Louis

Wed 10/21

12:10 pm-8:20 pm

1 stop9h 10m

$548

San JoséSt. Louis

SJO San José Juan Santamaria Intl - STL Lambert-St Louis

SJOSTL

San José Juan Santamaria Intl

Fri 10/16

7:10 am-2:00 pm

1 stop29h 50m

Lambert-St Louis

Wed 10/21

12:10 pm-10:00 pm

2 stops34h 50m

$557

San JoséSt. Louis

SJO San José Juan Santamaria Intl - STL Lambert-St Louis

SJOSTL

San José Juan Santamaria Intl

Fri 10/16

7:07 am-7:39 pm

1 stop11h 32m

Lambert-St Louis

Mon 10/19

10:35 am-3:11 pm

2 stops29h 36m

$562

San JoséSt. Louis

SJO San José Juan Santamaria Intl - STL Lambert-St Louis

SJOSTL

San José Juan Santamaria Intl

Tue 9/15

6:00 am-9:49 pm

1 stop14h 49m

Lambert-St Louis

Wed 9/23

5:00 am-8:07 pm

1 stop16h 07m

$612

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, September 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 $437. The month of November is another great option to travel to St. Louis, with average flight prices from Costa Rica averaging around $469.

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

You could potentially save up to 51% 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

8h 58m

Direct flights

None
The fastest flight from Costa Rica to St. Louis takes 8h 58m
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 $379Free CancellationRating
7.1
11,892 reviews
Search American Airlines flights
United AirlinesPriceFrom $400Free CancellationRating
7.4
10,089 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
Fairview Heights
Hermann
St. Peters
Maryland Heights
Florissant
Collinsville
Alton
O'Fallon
Clayton
Farmington
Fenton
Wentzville
Festus
Eureka
Edwardsville
Litchfield
Grafton
Shrewsbury

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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