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Cheap flights from Costa Rica to St. Louis from $278

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 9/27. 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
1:25 pm - 12:02 pm
SJO
-
STL
21h 37m
2 stops
United Airlines Logo
1:29 pm - 11:38 am
STL
-
SJO
23h 09m
2 stops
$444United Airlines
Thu, Sep 17 - Fri, Sep 25
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
$444United Airlines
Thu, Sep 17 - Fri, Sep 25
United Airlines Logo
7:55 am - 10:30 pm
SJO
-
STL
13h 35m
1 stop
United Airlines Logo
1:29 pm - 7:37 pm
STL
-
SJO
31h 08m
2 stops
$444United Airlines
Thu, Sep 17 - Fri, Sep 25
American Airlines Logo
2:57 pm - 9:29 am
SJO
-
STL
17h 32m
2 stops
American Airlines Logo
6:53 am - 8:07 pm
STL
-
SJO
14h 14m
2 stops
$458American Airlines
Thu, Sep 10 - Thu, Sep 17
American Airlines Logo
2:57 pm - 9:29 am
SJO
-
STL
17h 32m
2 stops
American Airlines Logo
5:00 am - 11:59 am
STL
-
SJO
7h 59m
1 stop
$458American Airlines
Thu, Sep 10 - Thu, Sep 17
Southwest Logo
1:40 pm - 9:55 pm
SJO
-
STL
7h 15m
1 stop
Southwest Logo
12:15 pm - 6:45 pm
STL
-
SJO
7h 30m
1 stop
$485Southwest
Thu, Sep 10 - Thu, Sep 17
United Airlines Logo
1:25 pm - 3:38 pm
SJO
-
STL
25h 13m
2 stops
United Airlines Logo
5:30 pm - 7:37 pm
STL
-
SJO
27h 07m
2 stops
$491United Airlines
Tue, Sep 15 - Wed, Sep 23
Southwest Logo
1:40 pm - 9:55 pm
SJO
-
STL
7h 15m
1 stop
Southwest Logo
12:15 pm - 6:45 pm
STL
-
SJO
7h 30m
1 stop
$500Southwest
Thu, Sep 10 - Thu, Sep 17
Multiple Airlines Logo
7:00 am - 7:39 pm
SJO
-
STL
12h 39m
1 stop
Multiple Airlines Logo
10:35 am - 3:18 pm
STL
-
SJO
28h 43m
2 stops
$513Multiple Airlines
Mon, Nov 2 - Mon, Nov 9
American Airlines Logo
1:07 pm - 11:42 pm
SJO
-
STL
9h 35m
1 stop
American Airlines Logo
2:11 pm - 8:07 pm
STL
-
SJO
6h 56m
1 stop
$538American Airlines
Fri, Sep 4 - Fri, Sep 18

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Air Canada flights from Costa Rica to St. Louis

Our best Air Canada deals on Costa Rica to St. Louis flight tickets
Air Canada
Nov 25
SJO8:45 amSan José Juan Santamaria Intl
30h 41m
1 stop
STL3:26 pmLambert-St Louis
Nov 30
STL4:05 pmLambert-St Louis
30h 25m
1 stop
SJO10:30 pmSan José Juan Santamaria Intl
$614
Air Canada
Nov 25
SJO9:20 amSan José Juan Santamaria Intl
30h 06m
2 stops
STL3:26 pmLambert-St Louis
Nov 30
STL4:05 pmLambert-St Louis
30h 25m
1 stop
SJO10:30 pmSan José Juan Santamaria Intl
$617
Air Canada
Nov 25
SJO9:20 amSan José Juan Santamaria Intl
30h 06m
2 stops
STL3:26 pmLambert-St Louis
Nov 30
STL4:05 pmLambert-St Louis
31h 45m
2 stops
SJO11:50 pmSan José Juan Santamaria Intl
$620

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 10
SJO2:57 pmSan José Juan Santamaria Intl
17h 32m
2 stops
STL9:29 amLambert-St Louis
Sep 17
STL6:53 amLambert-St Louis
14h 14m
2 stops
SJO8:07 pmSan José Juan Santamaria Intl
$458
American Airlines
Sep 4
SJO1:07 pmSan José Juan Santamaria Intl
9h 35m
1 stop
STL11:42 pmLambert-St Louis
Sep 18
STL2:11 pmLambert-St Louis
6h 56m
1 stop
SJO8:07 pmSan José Juan Santamaria Intl
$538
American Airlines
Sep 4
SJO1:29 pmSan José Juan Santamaria Intl
8h 11m
1 stop
STL10:40 pmLambert-St Louis
Sep 18
STL6:00 amLambert-St Louis
15h 07m
2 stops
SJO8:07 pmSan José Juan Santamaria Intl
$542

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 July 30, 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

Thu 9/17

1:25 pm-12:02 pm

2 stops21h 37m

Lambert-St Louis

Fri 9/25

1:29 pm-11:38 am

2 stops23h 09m

$444

San JoséSt. Louis

SJO - STL

SJOSTL

San José Juan Santamaria Intl

Thu 9/17

1:25 pm-10:30 pm

1 stop8h 05m

Lambert-St Louis

Fri 9/25

6:15 am-7:37 pm

1 stop14h 22m

$444

San JoséSt. Louis

SJO - STL

SJOSTL

San José Juan Santamaria Intl

Thu 9/17

7:55 am-10:30 pm

1 stop13h 35m

Lambert-St Louis

Fri 9/25

1:29 pm-7:37 pm

2 stops31h 08m

$444

San JoséSt. Louis

SJO - STL

SJOSTL

San José Juan Santamaria Intl

Thu 9/10

2:57 pm-9:29 am

2 stops17h 32m

Lambert-St Louis

Thu 9/17

6:53 am-8:07 pm

2 stops14h 14m

$458

San JoséSt. Louis

SJO - STL

SJOSTL

San José Juan Santamaria Intl

Thu 9/10

2:57 pm-9:29 am

2 stops17h 32m

Lambert-St Louis

Thu 9/17

5:00 am-11:59 am

1 stop7h 59m

$458
Quickest round-trip

San JoséSt. Louis

SJO - STL

SJOSTL

San José Juan Santamaria Intl

Thu 9/10

1:40 pm-9:55 pm

1 stop7h 15m

Lambert-St Louis

Thu 9/17

12:15 pm-6:45 pm

1 stop7h 30m

$485

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

Wed 9/23

5:30 pm-7:37 pm

2 stops27h 07m

$491

San JoséSt. Louis

SJO - STL

SJOSTL

San José Juan Santamaria Intl

Thu 9/10

1:40 pm-9:55 pm

1 stop7h 15m

Lambert-St Louis

Thu 9/17

12:15 pm-6:45 pm

1 stop7h 30m

$500

San JoséSt. Louis

SJO - STL

SJOSTL

San José Juan Santamaria Intl

Mon 11/2

7:00 am-7:39 pm

1 stop12h 39m

Lambert-St Louis

Mon 11/9

10:35 am-3:18 pm

2 stops28h 43m

$513

San JoséSt. Louis

SJO - STL

SJOSTL

San José Juan Santamaria Intl

Fri 9/4

1:07 pm-11:42 pm

1 stop9h 35m

Lambert-St Louis

Fri 9/18

2:11 pm-8:07 pm

1 stop6h 56m

$538

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 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 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
11,841 reviews
Search American Airlines flights
United AirlinesPriceFrom $400Free CancellationRating
7.4
10,046 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
O'Fallon
Alton
Fenton
Farmington
Clayton
Wentzville
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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