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Cheap flights from Costa Rica to St. Louis from $294

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 6/24. 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.
Frontier Logo
9:35 am - 11:49 pm
SJO
-
STL
13h 14m
1 stop
Frontier Logo
4:17 pm - 8:20 am
STL
-
SJO
17h 03m
1 stop
$475Frontier
Sun, Jun 21 - Sat, Jul 4
United Airlines Logo
1:25 pm - 3:38 pm
SJO
-
STL
25h 13m
2 stops
United Airlines Logo
5:30 pm - 12:21 pm
STL
-
SJO
19h 51m
2 stops
$506United Airlines
Tue, Sep 15 - Sun, Sep 20
United Airlines Logo
7:55 am - 12:02 pm
SJO
-
STL
27h 07m
3 stops
United Airlines Logo
6:54 pm - 12:21 pm
STL
-
SJO
18h 27m
2 stops
$517United Airlines
Tue, Sep 1 - Mon, Sep 14
American Airlines Logo
2:56 pm - 10:45 am
SJO
-
STL
18h 49m
1 stop
American Airlines Logo
5:42 am - 1:52 pm
STL
-
SJO
9h 10m
1 stop
$526American Airlines
Wed, Aug 19 - Sun, Aug 23
American Airlines Logo
2:56 pm - 10:45 am
SJO
-
STL
18h 49m
1 stop
American Airlines Logo
9:21 am - 7:53 pm
STL
-
SJO
11h 32m
2 stops
$531American Airlines
Wed, Aug 19 - Sun, Aug 23
American Airlines Logo
11:41 pm - 6:30 pm
SJO
-
STL
17h 49m
1 stop
American Airlines Logo
5:32 am - 2:37 pm
STL
-
SJO
10h 05m
1 stop
$538American Airlines
Thu, Jul 23 - Tue, Jul 28
United Airlines Logo
11:13 am - 8:39 am
SJO
-
STL
20h 26m
2 stops
United Airlines Logo
10:20 am - 10:11 am
STL
-
SJO
24h 51m
2 stops
$542United Airlines
Thu, Jul 23 - Tue, Jul 28
United Airlines Logo
1:25 pm - 10:30 pm
SJO
-
STL
8h 05m
1 stop
United Airlines Logo
6:15 am - 7:37 pm
STL
-
SJO
14h 22m
1 stop
$547United Airlines
Tue, Sep 29 - Sat, Oct 3
American Airlines Logo
11:41 pm - 6:32 pm
SJO
-
STL
17h 51m
1 stop
American Airlines Logo
7:24 pm - 2:37 pm
STL
-
SJO
20h 13m
1 stop
$548American Airlines
Fri, Jul 10 - Sat, Jul 25
United Airlines Logo
7:55 am - 10:45 pm
SJO
-
STL
13h 50m
1 stop
United Airlines Logo
2:00 pm - 7:53 pm
STL
-
SJO
29h 53m
1 stop
$550United Airlines
Sun, Jun 21 - Tue, Feb 23

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 15
SJO1:25 pmSan José Juan Santamaria Intl
25h 13m
2 stops
STL3:38 pmLambert-St Louis
Sep 20
STL5:30 pmLambert-St Louis
19h 51m
2 stops
SJO12:21 pmSan José Juan Santamaria Intl
$506
United Airlines
Sep 1
SJO7:55 amSan José Juan Santamaria Intl
27h 07m
3 stops
STL12:02 pmLambert-St Louis
Sep 14
STL6:54 pmLambert-St Louis
18h 27m
2 stops
SJO12:21 pmSan José Juan Santamaria Intl
$517
United Airlines
Jul 22
SJO12:30 amSan José Juan Santamaria Intl
16h 12m
1 stop
STL5:42 pmLambert-St Louis
Jul 28
STL5:59 pmLambert-St Louis
17h 12m
2 stops
SJO10:11 amSan José Juan Santamaria Intl
$542

Frontier flights from Costa Rica to St. Louis

Our best Frontier deals on Costa Rica to St. Louis flight tickets
Frontier
Jun 21
SJO9:35 amSan José Juan Santamaria Intl
13h 14m
1 stop
STL11:49 pmLambert-St Louis
Jul 4
STL4:17 pmLambert-St Louis
17h 03m
1 stop
SJO8:20 amSan José Juan Santamaria Intl
$475
Frontier
Jun 21
SJO9:35 amSan José Juan Santamaria Intl
13h 14m
1 stop
STL11:49 pmLambert-St Louis
Jul 4
STL7:38 pmLambert-St Louis
13h 42m
2 stops
SJO8:20 amSan José Juan Santamaria Intl
$598
Frontier
Jun 21
SJO9:35 amSan José Juan Santamaria Intl
13h 14m
1 stop
STL11:49 pmLambert-St Louis
Jul 8
STL8:08 pmLambert-St Louis
13h 12m
2 stops
SJO8:20 amSan José Juan Santamaria Intl
$619

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 June 1, 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

Sun 6/21

9:35 am-11:49 pm

1 stop13h 14m

Lambert-St Louis

Sat 7/4

4:17 pm-8:20 am

1 stop17h 03m

$475

San JoséSt. Louis

SJO - STL

SJOSTL

San José Juan Santamaria Intl

Tue 9/15

1:25 pm-3:38 pm

2 stops25h 13m

Lambert-St Louis

Sun 9/20

5:30 pm-12:21 pm

2 stops19h 51m

$506

San JoséSt. Louis

SJO - STL

SJOSTL

San José Juan Santamaria Intl

Tue 9/1

7:55 am-12:02 pm

3 stops27h 07m

Lambert-St Louis

Mon 9/14

6:54 pm-12:21 pm

2 stops18h 27m

$517

San JoséSt. Louis

SJO - STL

SJOSTL

San José Juan Santamaria Intl

Wed 8/19

2:56 pm-10:45 am

1 stop18h 49m

Lambert-St Louis

Sun 8/23

5:42 am-1:52 pm

1 stop9h 10m

$526

San JoséSt. Louis

SJO - STL

SJOSTL

San José Juan Santamaria Intl

Wed 8/19

2:56 pm-10:45 am

1 stop18h 49m

Lambert-St Louis

Sun 8/23

9:21 am-7:53 pm

2 stops11h 32m

$531

San JoséSt. Louis

SJO - STL

SJOSTL

San José Juan Santamaria Intl

Thu 7/23

11:41 pm-6:30 pm

1 stop17h 49m

Lambert-St Louis

Tue 7/28

5:32 am-2:37 pm

1 stop10h 05m

$538

San JoséSt. Louis

SJO - STL

SJOSTL

San José Juan Santamaria Intl

Thu 7/23

11:13 am-8:39 am

2 stops20h 26m

Lambert-St Louis

Tue 7/28

10:20 am-10:11 am

2 stops24h 51m

$542
Quickest round-trip

San JoséSt. Louis

SJO - STL

SJOSTL

San José Juan Santamaria Intl

Tue 9/29

1:25 pm-10:30 pm

1 stop8h 05m

Lambert-St Louis

Sat 10/3

6:15 am-7:37 pm

1 stop14h 22m

$547

San JoséSt. Louis

SJO - STL

SJOSTL

San José Juan Santamaria Intl

Fri 7/10

11:41 pm-6:32 pm

1 stop17h 51m

Lambert-St Louis

Sat 7/25

7:24 pm-2:37 pm

1 stop20h 13m

$548

San JoséSt. Louis

SJO - STL

SJOSTL

San José Juan Santamaria Intl

Sun 6/21

7:55 am-10:45 pm

1 stop13h 50m

Lambert-St Louis

Tue 2/23

2:00 pm-7:53 pm

1 stop29h 53m

$550

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

13h 50m

Direct flights

None
The fastest flight from Costa Rica to St. Louis takes 13h 50m
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
11,641 reviews
Search American Airlines flights
United AirlinesPriceFrom $306Free CancellationRating
7.4
9,768 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
Maryland Heights
O'Fallon
Florissant
St. Peters
Collinsville
Alton
Wentzville
Fenton
Farmington
Festus
Eureka
Litchfield
Clayton
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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