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Cheap flights from Costa Rica to St. Louis from $270

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 7/23. 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.
Frontier Logo
9:35 am - 11:59 pm
SJO
-
STL
13h 24m
1 stop
Frontier Logo
4:09 pm - 8:20 am
STL
-
SJO
17h 11m
1 stop
$475Frontier
Sun, Jul 12 - Wed, Aug 12
Southwest Logo
1:40 pm - 9:50 pm
SJO
-
STL
7h 10m
1 stop
Southwest Logo
12:15 pm - 6:40 pm
STL
-
SJO
7h 25m
1 stop
$483Southwest
Thu, Sep 10 - Thu, Sep 17
Southwest Logo
1:40 pm - 9:50 pm
SJO
-
STL
7h 10m
1 stop
Southwest Logo
8:00 am - 6:40 pm
STL
-
SJO
11h 40m
2 stops
$487Southwest
Thu, Sep 10 - Thu, Sep 17
United Airlines Logo
1:25 pm - 9:36 pm
SJO
-
STL
31h 11m
2 stops
United Airlines Logo
8:00 am - 12:21 pm
STL
-
SJO
29h 21m
2 stops
$491United Airlines
Thu, Sep 10 - Thu, Sep 17
United Airlines Logo
1:25 pm - 12:13 pm
SJO
-
STL
21h 48m
2 stops
United Airlines Logo
6:15 am - 7:37 pm
STL
-
SJO
14h 22m
1 stop
$500United Airlines
Tue, Sep 29 - Sat, Oct 3
United Airlines Logo
12:44 pm - 3:43 pm
SJO
-
STL
25h 59m
2 stops
United Airlines Logo
5:36 pm - 12:21 pm
STL
-
SJO
19h 45m
2 stops
$504United Airlines
Tue, Sep 29 - Sat, Oct 3
Frontier Logo
9:45 am - 11:59 pm
SJO
-
STL
13h 14m
1 stop
Frontier Logo
4:09 pm - 8:20 am
STL
-
SJO
17h 11m
1 stop
$507Frontier
Sat, Jul 11 - Wed, Aug 12
Frontier Logo
9:35 am - 11:59 pm
SJO
-
STL
13h 24m
1 stop
Frontier Logo
8:08 pm - 8:20 am
STL
-
SJO
13h 12m
2 stops
$532Frontier
Sun, Jul 12 - Wed, Aug 12
United Airlines Logo
7:45 am - 6:38 pm
SJO
-
STL
9h 53m
1 stop
United Airlines Logo
8:15 pm - 6:53 pm
STL
-
SJO
23h 38m
2 stops
$541United Airlines
Tue, Oct 27 - Wed, Oct 28
Southwest Logo
12:35 pm - 11:00 pm
SJO
-
STL
9h 25m
1 stop
Southwest Logo
5:00 am - 12:35 pm
STL
-
SJO
8h 35m
1 stop
$544Southwest
Sun, Sep 27 - Fri, Oct 2

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Frontier flights from Costa Rica to St. Louis

Our best Frontier deals on Costa Rica to St. Louis flight tickets
Frontier
Jul 12
SJO9:35 amSan José Juan Santamaria Intl
13h 24m
1 stop
STL11:59 pmLambert-St Louis
Aug 12
STL4:09 pmLambert-St Louis
17h 11m
1 stop
SJO8:20 amSan José Juan Santamaria Intl
$475
Frontier
Jul 11
SJO9:45 amSan José Juan Santamaria Intl
13h 14m
1 stop
STL11:59 pmLambert-St Louis
Aug 12
STL4:09 pmLambert-St Louis
17h 11m
1 stop
SJO8:20 amSan José Juan Santamaria Intl
$507
Frontier
Jul 12
SJO9:35 amSan José Juan Santamaria Intl
13h 24m
1 stop
STL11:59 pmLambert-St Louis
Aug 12
STL8:08 pmLambert-St Louis
13h 12m
2 stops
SJO8:20 amSan José Juan Santamaria Intl
$532

Southwest flights from Costa Rica to St. Louis

Our best Southwest deals on Costa Rica to St. Louis flight tickets
Southwest
Sep 10
SJO1:40 pmSan José Juan Santamaria Intl
7h 10m
1 stop
STL9:50 pmLambert-St Louis
Sep 17
STL12:15 pmLambert-St Louis
7h 25m
1 stop
SJO6:40 pmSan José Juan Santamaria Intl
$483
Southwest
Sep 10
SJO1:40 pmSan José Juan Santamaria Intl
7h 10m
1 stop
STL9:50 pmLambert-St Louis
Sep 17
STL8:00 amLambert-St Louis
11h 40m
2 stops
SJO6:40 pmSan José Juan Santamaria Intl
$487
Southwest
Sep 27
SJO12:35 pmSan José Juan Santamaria Intl
9h 25m
1 stop
STL11:00 pmLambert-St Louis
Oct 2
STL5:00 amLambert-St Louis
8h 35m
1 stop
SJO12:35 pmSan José Juan Santamaria Intl
$544

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 15, 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 7/12

9:35 am-11:59 pm

1 stop13h 24m

Lambert-St Louis

Wed 8/12

4:09 pm-8:20 am

1 stop17h 11m

$475
Quickest round-trip

San JoséSt. Louis

SJO - STL

SJOSTL

San José Juan Santamaria Intl

Thu 9/10

1:40 pm-9:50 pm

1 stop7h 10m

Lambert-St Louis

Thu 9/17

12:15 pm-6:40 pm

1 stop7h 25m

$483

San JoséSt. Louis

SJO - STL

SJOSTL

San José Juan Santamaria Intl

Thu 9/10

1:40 pm-9:50 pm

1 stop7h 10m

Lambert-St Louis

Thu 9/17

8:00 am-6:40 pm

2 stops11h 40m

$487

San JoséSt. Louis

SJO - STL

SJOSTL

San José Juan Santamaria Intl

Thu 9/10

1:25 pm-9:36 pm

2 stops31h 11m

Lambert-St Louis

Thu 9/17

8:00 am-12:21 pm

2 stops29h 21m

$491

San JoséSt. Louis

SJO - STL

SJOSTL

San José Juan Santamaria Intl

Tue 9/29

1:25 pm-12:13 pm

2 stops21h 48m

Lambert-St Louis

Sat 10/3

6:15 am-7:37 pm

1 stop14h 22m

$500

San JoséSt. Louis

SJO - STL

SJOSTL

San José Juan Santamaria Intl

Tue 9/29

12:44 pm-3:43 pm

2 stops25h 59m

Lambert-St Louis

Sat 10/3

5:36 pm-12:21 pm

2 stops19h 45m

$504

San JoséSt. Louis

SJO - STL

SJOSTL

San José Juan Santamaria Intl

Sat 7/11

9:45 am-11:59 pm

1 stop13h 14m

Lambert-St Louis

Wed 8/12

4:09 pm-8:20 am

1 stop17h 11m

$507

San JoséSt. Louis

SJO - STL

SJOSTL

San José Juan Santamaria Intl

Sun 7/12

9:35 am-11:59 pm

1 stop13h 24m

Lambert-St Louis

Wed 8/12

8:08 pm-8:20 am

2 stops13h 12m

$532

San JoséSt. Louis

SJO - STL

SJOSTL

San José Juan Santamaria Intl

Tue 10/27

7:45 am-6:38 pm

1 stop9h 53m

Lambert-St Louis

Wed 10/28

8:15 pm-6:53 pm

2 stops23h 38m

$541

San JoséSt. Louis

SJO - STL

SJOSTL

San José Juan Santamaria Intl

Sun 9/27

12:35 pm-11:00 pm

1 stop9h 25m

Lambert-St Louis

Fri 10/2

5:00 am-12:35 pm

1 stop8h 35m

$544

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, 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 $0. The month of November is another great option to travel to St. Louis, with average flight prices from Costa Rica averaging around $186.

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

You could potentially save up to 46% 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

7h 10m

Direct flights

None
The fastest flight from Costa Rica to St. Louis takes 7h 10m
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
11,660 reviews
Search American Airlines flights
United AirlinesPriceFrom $396Free CancellationRating
7.4
9,830 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
Florissant
O'Fallon
St. Peters
Collinsville
Alton
Wentzville
Clayton
Fenton
Farmington
Festus
Eureka
Litchfield
Edwardsville
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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