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Cheap flights from Costa Rica to St. Louis from $349

This is the cheapest round-trip 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 6/1. 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

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.
Frontier Logo
9:35 am - 11:57 pm
SJO
-
STL
13h 22m
1 stop
Frontier Logo
4:19 pm - 8:19 am
STL
-
SJO
17h 00m
1 stop
$349Frontier
Mon, Jun 1 - Fri, Jun 5
United Airlines Logo
1:25 pm - 8:37 am
SJO
-
STL
18h 12m
2 stops
United Airlines Logo
6:15 am - 12:21 pm
STL
-
SJO
7h 06m
1 stop
$385United Airlines
Wed, Sep 23 - Sun, Sep 27
American Airlines Logo
11:35 pm - 11:27 am
SJO
-
STL
10h 52m
1 stop
American Airlines Logo
6:12 pm - 1:09 pm
STL
-
SJO
19h 57m
2 stops
$399American Airlines
Wed, May 13 - Tue, Jun 2
United Airlines Logo
1:25 pm - 8:37 am
SJO
-
STL
18h 12m
2 stops
United Airlines Logo
8:15 pm - 12:21 pm
STL
-
SJO
17h 06m
2 stops
$417United Airlines
Wed, Sep 23 - Fri, Sep 25
United Airlines Logo
7:55 am - 10:30 pm
SJO
-
STL
13h 35m
1 stop
United Airlines Logo
11:10 am - 10:39 pm
STL
-
SJO
12h 29m
1 stop
$426United Airlines
Wed, May 13 - Thu, May 28
United Airlines Logo
7:55 am - 10:30 pm
SJO
-
STL
13h 35m
1 stop
United Airlines Logo
6:00 am - 10:39 pm
STL
-
SJO
17h 39m
2 stops
$430United Airlines
Wed, May 13 - Thu, May 28
American Airlines Logo
11:35 pm - 1:22 pm
SJO
-
STL
12h 47m
2 stops
American Airlines Logo
5:18 pm - 11:50 am
STL
-
SJO
19h 32m
2 stops
$447American Airlines
Wed, May 13 - Tue, Jun 2
United Airlines Logo
7:55 am - 10:30 pm
SJO
-
STL
13h 35m
1 stop
United Airlines Logo
8:35 am - 10:39 pm
STL
-
SJO
15h 04m
1 stop
$450United Airlines
Wed, May 13 - Tue, Jun 2
United Airlines Logo
7:55 am - 8:39 am
SJO
-
STL
23h 44m
2 stops
United Airlines Logo
8:35 am - 10:11 am
STL
-
SJO
26h 36m
1 stop
$454United Airlines
Sat, May 16 - Wed, Jun 3
United Airlines Logo
7:55 am - 10:48 am
SJO
-
STL
25h 53m
2 stops
United Airlines Logo
5:41 pm - 10:11 am
STL
-
SJO
17h 30m
2 stops
$462United Airlines
Sat, May 16 - Wed, Jun 3

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Southwest flights from Costa Rica to St. Louis

Our best Southwest deals on Costa Rica to St. Louis flight tickets
Southwest
Sep 23
SJO9:00 amSan José Juan Santamaria Intl
12h 10m
2 stops
STL10:10 pmLambert-St Louis
Sep 28
STL12:15 pmLambert-St Louis
7h 25m
1 stop
SJO6:40 pmSan José Juan Santamaria Intl
$473
Southwest
Sep 23
SJO9:00 amSan José Juan Santamaria Intl
9h 55m
1 stop
STL7:55 pmLambert-St Louis
Sep 28
STL12:15 pmLambert-St Louis
7h 25m
1 stop
SJO6:40 pmSan José Juan Santamaria Intl
$487
Southwest
Sep 23
SJO9:00 amSan José Juan Santamaria Intl
12h 10m
2 stops
STL10:10 pmLambert-St Louis
Sep 28
STL8:25 amLambert-St Louis
11h 15m
2 stops
SJO6:40 pmSan José Juan Santamaria Intl
$492

American Airlines flights from Costa Rica to St. Louis

Our best American Airlines deals on Costa Rica to St. Louis flight tickets
American Airlines
May 13
SJO11:35 pmSan José Juan Santamaria Intl
10h 52m
1 stop
STL11:27 amLambert-St Louis
Jun 2
STL6:12 pmLambert-St Louis
19h 57m
2 stops
SJO1:09 pmSan José Juan Santamaria Intl
$399
American Airlines
May 13
SJO11:35 pmSan José Juan Santamaria Intl
12h 47m
2 stops
STL1:22 pmLambert-St Louis
Jun 2
STL5:18 pmLambert-St Louis
19h 32m
2 stops
SJO11:50 amSan José Juan Santamaria Intl
$447
American Airlines
May 13
SJO11:35 pmSan José Juan Santamaria Intl
8h 19m
1 stop
STL8:54 amLambert-St Louis
May 28
STL6:15 amLambert-St Louis
14h 09m
2 stops
SJO7:24 pmSan José Juan Santamaria Intl
$476

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 April 23, 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

Mon 6/1

9:35 am-11:57 pm

1 stop13h 22m

Lambert-St Louis

Fri 6/5

4:19 pm-8:19 am

1 stop17h 00m

$349
Quickest round-trip

San JoséSt. Louis

SJO - STL

SJOSTL

San José Juan Santamaria Intl

Wed 9/23

1:25 pm-8:37 am

2 stops18h 12m

Lambert-St Louis

Sun 9/27

6:15 am-12:21 pm

1 stop7h 06m

$385

San JoséSt. Louis

SJO - STL

SJOSTL

San José Juan Santamaria Intl

Wed 5/13

11:35 pm-11:27 am

1 stop10h 52m

Lambert-St Louis

Tue 6/2

6:12 pm-1:09 pm

2 stops19h 57m

$399

San JoséSt. Louis

SJO - STL

SJOSTL

San José Juan Santamaria Intl

Wed 9/23

1:25 pm-8:37 am

2 stops18h 12m

Lambert-St Louis

Fri 9/25

8:15 pm-12:21 pm

2 stops17h 06m

$417

San JoséSt. Louis

SJO - STL

SJOSTL

San José Juan Santamaria Intl

Wed 5/13

7:55 am-10:30 pm

1 stop13h 35m

Lambert-St Louis

Thu 5/28

11:10 am-10:39 pm

1 stop12h 29m

$426

San JoséSt. Louis

SJO - STL

SJOSTL

San José Juan Santamaria Intl

Wed 5/13

7:55 am-10:30 pm

1 stop13h 35m

Lambert-St Louis

Thu 5/28

6:00 am-10:39 pm

2 stops17h 39m

$430

San JoséSt. Louis

SJO - STL

SJOSTL

San José Juan Santamaria Intl

Wed 5/13

11:35 pm-1:22 pm

2 stops12h 47m

Lambert-St Louis

Tue 6/2

5:18 pm-11:50 am

2 stops19h 32m

$447

San JoséSt. Louis

SJO - STL

SJOSTL

San José Juan Santamaria Intl

Wed 5/13

7:55 am-10:30 pm

1 stop13h 35m

Lambert-St Louis

Tue 6/2

8:35 am-10:39 pm

1 stop15h 04m

$450

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

8:35 am-10:11 am

1 stop26h 36m

$454

San JoséSt. Louis

SJO - STL

SJOSTL

San José Juan Santamaria Intl

Sat 5/16

7:55 am-10:48 am

2 stops25h 53m

Lambert-St Louis

Wed 6/3

5:41 pm-10:11 am

2 stops17h 30m

$462

Flights are sorted by cheapest round-trip flights first.

Sorted by cheapest first

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, October 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 $336. The month of September is another great option to travel to St. Louis, with average flight prices from Costa Rica averaging around $367.

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

8h 54m

Direct flights

None
The fastest flight from Costa Rica to St. Louis takes 8h 54m
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
11,659 reviews
Search American Airlines flights
United AirlinesPriceFrom $306Free CancellationRating
7.4
9,637 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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