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Cheap flights from Costa Rica to St. Louis from $321

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 6/22. 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
1:25 pm - 12:03 pm
SJO
-
STL
21h 38m
2 stops
United Airlines Logo
5:30 pm - 12:21 pm
STL
-
SJO
19h 51m
2 stops
$521United Airlines
Fri, Sep 4 - Sun, Sep 6
Frontier Logo
9:35 am - 11:59 pm
SJO
-
STL
13h 24m
1 stop
Frontier Logo
4:10 pm - 8:20 am
STL
-
SJO
17h 10m
1 stop
$525Frontier
Thu, Aug 13 - Thu, Aug 20
American Airlines Logo
7:00 am - 10:57 pm
SJO
-
STL
14h 57m
1 stop
American Airlines Logo
7:04 am - 10:43 pm
STL
-
SJO
16h 39m
1 stop
$538American Airlines
Wed, Jun 10 - Fri, Jun 12
United Airlines Logo
1:25 pm - 12:03 pm
SJO
-
STL
21h 38m
2 stops
United Airlines Logo
6:54 pm - 12:21 pm
STL
-
SJO
18h 27m
2 stops
$542United Airlines
Fri, Sep 4 - Sun, Sep 6
American Airlines Logo
7:00 am - 10:57 pm
SJO
-
STL
14h 57m
1 stop
American Airlines Logo
7:04 am - 10:43 pm
STL
-
SJO
16h 39m
1 stop
$548American Airlines
Wed, Jun 10 - Fri, Jun 12
American Airlines Logo
7:00 am - 10:24 pm
SJO
-
STL
14h 24m
2 stops
American Airlines Logo
6:51 pm - 11:05 am
STL
-
SJO
17h 14m
2 stops
$552American Airlines
Sat, Sep 12 - Sun, Sep 20
United Airlines Logo
7:55 am - 3:31 pm
SJO
-
STL
30h 36m
2 stops
United Airlines Logo
6:54 pm - 7:37 pm
STL
-
SJO
25h 43m
2 stops
$554United Airlines
Fri, Sep 4 - Sun, Sep 6
United Airlines Logo
7:15 am - 11:44 pm
SJO
-
STL
15h 29m
1 stop
United Airlines Logo
1:13 pm - 10:11 am
STL
-
SJO
21h 58m
2 stops
$562United Airlines
Thu, Jul 23 - Tue, Jul 28
American Airlines Logo
6:00 am - 11:23 pm
SJO
-
STL
16h 23m
2 stops
American Airlines Logo
7:34 am - 7:52 pm
STL
-
SJO
13h 18m
2 stops
$572American Airlines
Thu, Aug 13 - Thu, Aug 20
American Airlines Logo
11:59 pm - 6:29 pm
SJO
-
STL
17h 30m
1 stop
American Airlines Logo
5:29 am - 10:43 pm
STL
-
SJO
18h 14m
1 stop
$587American Airlines
Fri, Jun 5 - Sun, Jun 21

American Airlines flights from Costa Rica to St. Louis

Our best American Airlines deals on Costa Rica to St. Louis flight tickets
American Airlines
Jun 10
SJO7:00 amSan José Juan Santamaria Intl
14h 57m
1 stop
STL10:57 pmLambert-St Louis
Jun 12
STL7:04 amLambert-St Louis
16h 39m
1 stop
SJO10:43 pmSan José Juan Santamaria Intl
$538
American Airlines
Jun 10
SJO7:00 amSan José Juan Santamaria Intl
14h 57m
1 stop
STL10:57 pmLambert-St Louis
Jun 12
STL7:04 amLambert-St Louis
16h 39m
1 stop
SJO10:43 pmSan José Juan Santamaria Intl
$548
American Airlines
Sep 12
SJO7:00 amSan José Juan Santamaria Intl
14h 24m
2 stops
STL10:24 pmLambert-St Louis
Sep 20
STL6:51 pmLambert-St Louis
17h 14m
2 stops
SJO11:05 amSan José Juan Santamaria Intl
$552

United Airlines flights from Costa Rica to St. Louis

Our best United Airlines deals on Costa Rica to St. Louis flight tickets
United Airlines
Sep 4
SJO1:25 pmSan José Juan Santamaria Intl
21h 38m
2 stops
STL12:03 pmLambert-St Louis
Sep 6
STL5:30 pmLambert-St Louis
19h 51m
2 stops
SJO12:21 pmSan José Juan Santamaria Intl
$521
United Airlines
Sep 4
SJO1:25 pmSan José Juan Santamaria Intl
21h 38m
2 stops
STL12:03 pmLambert-St Louis
Sep 6
STL6:54 pmLambert-St Louis
18h 27m
2 stops
SJO12:21 pmSan José Juan Santamaria Intl
$542
United Airlines
Sep 4
SJO7:55 amSan José Juan Santamaria Intl
30h 36m
2 stops
STL3:31 pmLambert-St Louis
Sep 6
STL6:54 pmLambert-St Louis
25h 43m
2 stops
SJO7:37 pmSan José Juan Santamaria Intl
$554

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 22, 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

Fri 9/4

1:25 pm-12:03 pm

2 stops21h 38m

Lambert-St Louis

Sun 9/6

5:30 pm-12:21 pm

2 stops19h 51m

$521

San JoséSt. Louis

SJO - STL

SJOSTL

San José Juan Santamaria Intl

Thu 8/13

9:35 am-11:59 pm

1 stop13h 24m

Lambert-St Louis

Thu 8/20

4:10 pm-8:20 am

1 stop17h 10m

$525

San JoséSt. Louis

SJO - STL

SJOSTL

San José Juan Santamaria Intl

Wed 6/10

7:00 am-10:57 pm

1 stop14h 57m

Lambert-St Louis

Fri 6/12

7:04 am-10:43 pm

1 stop16h 39m

$538

San JoséSt. Louis

SJO - STL

SJOSTL

San José Juan Santamaria Intl

Fri 9/4

1:25 pm-12:03 pm

2 stops21h 38m

Lambert-St Louis

Sun 9/6

6:54 pm-12:21 pm

2 stops18h 27m

$542

San JoséSt. Louis

SJO - STL

SJOSTL

San José Juan Santamaria Intl

Wed 6/10

7:00 am-10:57 pm

1 stop14h 57m

Lambert-St Louis

Fri 6/12

7:04 am-10:43 pm

1 stop16h 39m

$548

San JoséSt. Louis

SJO - STL

SJOSTL

San José Juan Santamaria Intl

Sat 9/12

7:00 am-10:24 pm

2 stops14h 24m

Lambert-St Louis

Sun 9/20

6:51 pm-11:05 am

2 stops17h 14m

$552

San JoséSt. Louis

SJO - STL

SJOSTL

San José Juan Santamaria Intl

Fri 9/4

7:55 am-3:31 pm

2 stops30h 36m

Lambert-St Louis

Sun 9/6

6:54 pm-7:37 pm

2 stops25h 43m

$554

San JoséSt. Louis

SJO - STL

SJOSTL

San José Juan Santamaria Intl

Thu 7/23

7:15 am-11:44 pm

1 stop15h 29m

Lambert-St Louis

Tue 7/28

1:13 pm-10:11 am

2 stops21h 58m

$562
Quickest round-trip

San JoséSt. Louis

SJO - STL

SJOSTL

San José Juan Santamaria Intl

Thu 8/13

6:00 am-11:23 pm

2 stops16h 23m

Lambert-St Louis

Thu 8/20

7:34 am-7:52 pm

2 stops13h 18m

$572

San JoséSt. Louis

SJO - STL

SJOSTL

San José Juan Santamaria Intl

Fri 6/5

11:59 pm-6:29 pm

1 stop17h 30m

Lambert-St Louis

Sun 6/21

5:29 am-10:43 pm

1 stop18h 14m

$587

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 September is another great option to travel to St. Louis, with average flight prices from Costa Rica averaging around $257.

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

You could potentially save up to 44% 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 20m

Direct flights

None
The fastest flight from Costa Rica to St. Louis takes 8h 20m
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
11,644 reviews
Search American Airlines flights
United AirlinesPriceFrom $328Free CancellationRating
7.4
9,751 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
Florissant
O'Fallon
St. Peters
Collinsville
Alton
Wentzville
Fenton
Farmington
Festus
Eureka
Clayton
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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