Latest deals
Insights
When to book
FAQs
Reviews
Price Alerts

Cheap flights from St. Louis to San José from $160

This is the cheapest one-way flight price found by a momondo user in the last 72 hours by searching for a flight from St. Louis to San José departing on 5/13. 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.

Save money when you book flights with momondo

Big names and deals

Big names and deals

Search 100s of travel sites to compare prices.

Filter for what you want

Filter for what you want

Free Wi-Fi? Stopover? Instantly customize your results.

Trusted and free

Trusted and free

We’re completely free to use - no hidden charges or fees.

Price Alerts

Price Alerts

Not ready to book? to track prices.
Search flight deals

Find the cheapest flights from St. Louis to San José

Cheap round-trip flights

Enter your travel dates to find the best prices.
American Airlines Logo
5:24 am - 1:04 pm
STL
-
SJO
8h 40m
1 stop
American Airlines Logo
6:30 am - 10:24 pm
SJO
-
STL
14h 54m
1 stop
$342American Airlines
Mon, May 11 - Fri, May 15
Frontier Logo
4:19 pm - 8:19 am
STL
-
SJO
17h 00m
1 stop
Frontier Logo
9:35 am - 12:21 am
SJO
-
STL
13h 46m
1 stop
$343Frontier
Wed, May 27 - Sat, May 30
American Airlines Logo
6:35 am - 7:07 pm
STL
-
SJO
13h 32m
2 stops
American Airlines Logo
2:08 pm - 10:59 pm
SJO
-
STL
7h 51m
1 stop
$347American Airlines
Mon, May 11 - Fri, May 15
American Airlines Logo
6:11 pm - 1:26 pm
STL
-
SJO
20h 15m
1 stop
American Airlines Logo
12:50 pm - 10:58 pm
SJO
-
STL
9h 08m
1 stop
$349American Airlines
Sat, May 16 - Fri, May 22
American Airlines Logo
5:24 am - 7:07 pm
STL
-
SJO
14h 43m
1 stop
American Airlines Logo
12:10 pm - 10:24 pm
SJO
-
STL
9h 14m
1 stop
$360American Airlines
Mon, May 11 - Mon, May 18
American Airlines Logo
5:51 am - 7:07 pm
STL
-
SJO
14h 16m
2 stops
American Airlines Logo
12:10 pm - 10:24 pm
SJO
-
STL
9h 14m
1 stop
$365American Airlines
Mon, May 11 - Mon, May 18
Frontier Logo
4:19 pm - 8:19 am
STL
-
SJO
17h 00m
1 stop
Frontier Logo
9:35 am - 12:21 am
SJO
-
STL
13h 46m
1 stop
$373Frontier
Sun, May 24 - Sat, May 30
Frontier Logo
4:10 pm - 8:20 am
STL
-
SJO
17h 10m
1 stop
Frontier Logo
9:35 am - 12:14 am
SJO
-
STL
13h 39m
1 stop
$398Frontier
Thu, Jun 11 - Sun, Jun 14
American Airlines Logo
5:24 am - 11:07 am
STL
-
SJO
6h 43m
1 stop
American Airlines Logo
11:35 pm - 8:51 am
SJO
-
STL
8h 16m
1 stop
$402American Airlines
Wed, Apr 29 - Wed, May 20
Frontier Logo
3:27 pm - 8:19 am
STL
-
SJO
17h 52m
2 stops
Frontier Logo
9:35 am - 12:21 am
SJO
-
STL
13h 46m
1 stop
$404Frontier
Sat, May 23 - Sat, May 30

American Airlines flights from St. Louis to San José

Our best American Airlines deals on St. Louis to San José flight tickets
American Airlines
May 11
STL5:24 amLambert-St Louis
8h 40m
1 stop
SJO1:04 pmSan José Juan Santamaria Intl
May 15
SJO6:30 amSan José Juan Santamaria Intl
14h 54m
1 stop
STL10:24 pmLambert-St Louis
$342
American Airlines
May 11
STL6:35 amLambert-St Louis
13h 32m
2 stops
SJO7:07 pmSan José Juan Santamaria Intl
May 15
SJO2:08 pmSan José Juan Santamaria Intl
7h 51m
1 stop
STL10:59 pmLambert-St Louis
$347
American Airlines
May 16
STL6:11 pmLambert-St Louis
20h 15m
1 stop
SJO1:26 pmSan José Juan Santamaria Intl
May 22
SJO12:50 pmSan José Juan Santamaria Intl
9h 08m
1 stop
STL10:58 pmLambert-St Louis
$349

GOL flights from St. Louis to San José

Our best GOL deals on St. Louis to San José flight tickets
GOL
May 6
STL12:27 pmLambert-St Louis
10h 09m
1 stop
SJO9:36 pmSan José Juan Santamaria Intl
May 9
SJO11:35 pmSan José Juan Santamaria Intl
16h 46m
1 stop
STL5:21 pmLambert-St Louis
$419
GOL
May 6
STL7:12 amLambert-St Louis
7h 10m
1 stop
SJO1:22 pmSan José Juan Santamaria Intl
May 9
SJO6:30 amSan José Juan Santamaria Intl
16h 26m
2 stops
STL11:56 pmLambert-St Louis
$424
GOL
Jun 2
STL5:18 pmLambert-St Louis
20h 41m
2 stops
SJO12:59 pmSan José Juan Santamaria Intl
Jun 9
SJO3:08 pmSan José Juan Santamaria Intl
19h 51m
2 stops
STL11:59 amLambert-St Louis
$438

momondo Fare Finder

 
Customize your flight search to find flights from St. Louis to San José 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 March 24, 2026.
Use the filters below to find and compare flights from St. Louis to San José that are best for you.

Fly from

Fly to

Route

Depart

Return

Price

Cheapest round-trip

St. LouisSan José

STL - SJO

STLSJO

Lambert-St Louis

Mon 5/11

5:24 am-1:04 pm

1 stop8h 40m

San José Juan Santamaria Intl

Fri 5/15

6:30 am-10:24 pm

1 stop14h 54m

$342

St. LouisSan José

STL - SJO

STLSJO

Lambert-St Louis

Wed 5/27

4:19 pm-8:19 am

1 stop17h 00m

San José Juan Santamaria Intl

Sat 5/30

9:35 am-12:21 am

1 stop13h 46m

$343

St. LouisSan José

STL - SJO

STLSJO

Lambert-St Louis

Mon 5/11

6:35 am-7:07 pm

2 stops13h 32m

San José Juan Santamaria Intl

Fri 5/15

2:08 pm-10:59 pm

1 stop7h 51m

$347

St. LouisSan José

STL - SJO

STLSJO

Lambert-St Louis

Sat 5/16

6:11 pm-1:26 pm

1 stop20h 15m

San José Juan Santamaria Intl

Fri 5/22

12:50 pm-10:58 pm

1 stop9h 08m

$349

St. LouisSan José

STL - SJO

STLSJO

Lambert-St Louis

Mon 5/11

5:24 am-7:07 pm

1 stop14h 43m

San José Juan Santamaria Intl

Mon 5/18

12:10 pm-10:24 pm

1 stop9h 14m

$360

St. LouisSan José

STL - SJO

STLSJO

Lambert-St Louis

Mon 5/11

5:51 am-7:07 pm

2 stops14h 16m

San José Juan Santamaria Intl

Mon 5/18

12:10 pm-10:24 pm

1 stop9h 14m

$365

St. LouisSan José

STL - SJO

STLSJO

Lambert-St Louis

Sun 5/24

4:19 pm-8:19 am

1 stop17h 00m

San José Juan Santamaria Intl

Sat 5/30

9:35 am-12:21 am

1 stop13h 46m

$373

St. LouisSan José

STL - SJO

STLSJO

Lambert-St Louis

Thu 6/11

4:10 pm-8:20 am

1 stop17h 10m

San José Juan Santamaria Intl

Sun 6/14

9:35 am-12:14 am

1 stop13h 39m

$398
Quickest round-trip

St. LouisSan José

STL - SJO

STLSJO

Lambert-St Louis

Wed 4/29

5:24 am-11:07 am

1 stop6h 43m

San José Juan Santamaria Intl

Wed 5/20

11:35 pm-8:51 am

1 stop8h 16m

$402

St. LouisSan José

STL - SJO

STLSJO

Lambert-St Louis

Sat 5/23

3:27 pm-8:19 am

2 stops17h 52m

San José Juan Santamaria Intl

Sat 5/30

9:35 am-12:21 am

1 stop13h 46m

$404

Flights are sorted by cheapest round-trip flights first.

Showing 1-10 of 20 resultsSorted by cheapest first
1
2

See travel insights to San José from

How to get the cheapest flight ticket from St. Louis to San José

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 San José?

In general, January is the cheapest month to fly from St. Louis to San José. Due to it being the ‘off-season’ during this time, you can expect flight prices to be around $403. If you don’t want to visit San José in January, then you should wait until October to fly from St. Louis, when ticket prices are also cheap, with an average price of $413.

How far in advance should I book a flight to San José?

You are more likely to see cheaper flights to San José from St. Louis when booking weeks ahead of your departure date. In general, you can expect to find flights to San José for around $552 when searching weeks out. However, flight prices might be lower outside of this timeframe. For example, people recently found flights to San José from St. Louis for as low as $453 on momondo.

How have St. Louis to San José flight prices changed over time?

When to book flights from St. Louis to San José

Are you open to changing your travel dates? Check out the ideal times to fly from St. Louis to San José according to our flight data. Find out which month and days have the cheapest flights.
Estimated round-trip price

Cheap St. Louis to San José (STL to SJO) flight deals and tips

Find info about flight duration, direct flights, and airports for your flight from St. Louis to San José

Fastest flight time

6h 52m

Direct flights

None
The fastest flight from St. Louis to San José takes 6h 52m
There are no direct flights from St. Louis to San José. There are no popular flight routes from St. Louis to San José.
Search flight deals

  • How far is Lambert-St Louis to San José Juan Santamaria Intl by plane?

    Lambert-St Louis and San José Juan Santamaria Intl are 2016.9 mi apart from one another. In terms of flight time, this usually takes a little over 6h 52m.

  • When did momondo last update prices for flights from Lambert-St Louis Airport to San José Juan Santamaria Intl Airport?

    Prices for flights from Lambert-St Louis Airport to San José Juan Santamaria Intl Airport are updated daily.

  • How many operators does momondo search for flights from Lambert-St Louis Airport to San José Juan Santamaria Intl Airport?

  • How old do you have to be to fly from Lambert-St Louis Airport to San José Juan Santamaria Intl Airport?

    The minimum age for a child to fly alone is five, but airlines that offer an unaccompanied minor (UNMR) service may have their own age limitations. Flight duration, scheduling, and layovers are among the considerations that may influence age limits. We recommend that you double-check with the airline you are booking with for travel from Lambert-St Louis Airport to San José Juan Santamaria Intl Airport.

  • What documentation or ID do you need to fly to San José Juan Santamaria Intl Airport?

    The travel and health documents you'll need for your trip to San José Juan Santamaria Intl Airport may differ based on your itinerary and personal situation. Typically, you should have several documents on hand, such as a national ID card or driver's license and a passport that is valid for six months after your intended arrival at San José Juan Santamaria Intl Airport. It is always advisable to seek advice from your airline or a trusted third party, such as IATA.

  • What is the most popular airline from St. Louis to San José?

Best airlines flying from St. Louis to San José

Compare and see reviews for airlines that fly from St. Louis to San José with momondo
Airline
Rating
Free Cancellation
Price
DeltaPriceFrom $257Free CancellationRating
7.9
8,320 reviews
Search Delta flights
American AirlinesPriceFrom $331Free CancellationRating
7.1
11,492 reviews
Search American Airlines flights
United AirlinesPriceFrom $379Free CancellationRating
7.4
9,469 reviews
Search United Airlines flights
SouthwestPriceFrom $383Free CancellationRating
8.0
4,329 reviews
Search Southwest flights

Traveling to a place near San José?

Book flights to San José if you plan to visit one of these locations
Manuel Antonio
Jacó
Monteverde
Alajuela
Heredia
Santa Elena
Dominical
San Gerardo de Dota
Esterillos Este

Why use momondo?

Why should I use momondo to find a flight deal from St. Louis to San José?

momondo compares prices from hundreds of airlines and agents so you can find and book the best deal on flights from St. Louis to San José. Millions of users trust and use momondo every year so you are in good hands.

Can I find flights from St. Louis to San José with flexible booking policies on momondo?

Yes. momondo enables you to select and highlight flights to San José from St. Louis with this policy.

How can momondo help me find flights from St. Louis to San José?

momondo offers useful filters to help you find the right flight. Choose specific flight times, airports or even what payment method you prefer. We have numerous options to help you book your ideal flight from St. Louis to San José.

I’m not ready to book a flight from St. Louis to San José right now. Can momondo alert me if prices change?

If you are simply researching potential flights to San José, momondo offers a useful price alert feature which will track prices for flights to San José from St. Louis and alert you when they change.

An easier way to manage your San José trip

We make it super easy to schedule, organize and travel with friends or family. Trips is free — and available to use no matter where you book.
Start using Trips
Find my bookings

Get notified when prices go down

Daily price changes in your inbox - only with Price Alerts.
1 adult
Thu 4/23
Thu 4/30
By creating a price alert you accept our terms of use and privacy policy.

Find better results for your trip to Costa Rica