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Cheap flights from St. Louis to San José from $182

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 6/23. 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
0 bags

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Find the cheapest flights from St. Louis to San José

Cheap round-trip flights

Enter your travel dates to find the best prices.
Frontier Logo
4:09 pm - 8:20 am
STL
-
SJO
17h 11m
1 stop
Frontier Logo
9:35 am - 11:59 pm
SJO
-
STL
13h 24m
1 stop
$358Frontier
Fri, Jul 24 - Sun, Jul 26
Frontier Logo
4:17 pm - 8:20 am
STL
-
SJO
17h 03m
1 stop
Frontier Logo
9:35 am - 11:59 pm
SJO
-
STL
13h 24m
1 stop
$368Frontier
Sat, Jun 20 - Sat, Jul 11
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
$369Frontier
Sun, Aug 30 - Thu, Sep 3
Frontier Logo
4:09 pm - 8:20 am
STL
-
SJO
17h 11m
1 stop
Frontier Logo
9:35 am - 11:59 pm
SJO
-
STL
13h 24m
1 stop
$372Frontier
Sat, Jul 25 - Sat, Aug 1
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
$378Frontier
Thu, Aug 20 - Mon, Aug 24
Frontier Logo
4:17 pm - 8:20 am
STL
-
SJO
17h 03m
1 stop
Frontier Logo
9:35 am - 11:59 pm
SJO
-
STL
13h 24m
1 stop
$389Frontier
Sat, Jun 20 - Sat, Jul 11
American Airlines Logo
8:36 am - 10:42 pm
STL
-
SJO
15h 06m
1 stop
American Airlines Logo
2:00 pm - 8:38 am
SJO
-
STL
17h 38m
1 stop
$396American Airlines
Sun, May 31 - Fri, Jun 5
American Airlines Logo
6:03 am - 7:52 pm
STL
-
SJO
14h 49m
2 stops
American Airlines Logo
6:00 am - 11:23 pm
SJO
-
STL
16h 23m
2 stops
$401American Airlines
Sun, Aug 30 - Thu, Sep 3
Frontier Logo
4:17 pm - 8:20 am
STL
-
SJO
17h 03m
1 stop
Frontier Logo
9:35 am - 5:37 pm
SJO
-
STL
31h 02m
2 stops
$403Frontier
Sat, Jun 20 - Sat, Jul 11
Frontier Logo
4:09 pm - 8:20 am
STL
-
SJO
17h 11m
1 stop
Frontier Logo
9:35 am - 5:37 pm
SJO
-
STL
31h 02m
2 stops
$416Frontier
Sat, Jul 25 - Sat, Aug 1

Frontier flights from St. Louis to San José

Our best Frontier deals on St. Louis to San José flight tickets
Frontier
Jul 24
STL4:09 pmLambert-St Louis
17h 11m
1 stop
SJO8:20 amSan José Juan Santamaria Intl
Jul 26
SJO9:35 amSan José Juan Santamaria Intl
13h 24m
1 stop
STL11:59 pmLambert-St Louis
$358
Frontier
Jun 20
STL4:17 pmLambert-St Louis
17h 03m
1 stop
SJO8:20 amSan José Juan Santamaria Intl
Jul 11
SJO9:35 amSan José Juan Santamaria Intl
13h 24m
1 stop
STL11:59 pmLambert-St Louis
$368
Frontier
Aug 30
STL4:10 pmLambert-St Louis
17h 10m
1 stop
SJO8:20 amSan José Juan Santamaria Intl
Sep 3
SJO9:35 amSan José Juan Santamaria Intl
13h 39m
1 stop
STL12:14 amLambert-St Louis
$369

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 31
STL8:36 amLambert-St Louis
15h 06m
1 stop
SJO10:42 pmSan José Juan Santamaria Intl
Jun 5
SJO2:00 pmSan José Juan Santamaria Intl
17h 38m
1 stop
STL8:38 amLambert-St Louis
$396
American Airlines
Aug 30
STL6:03 amLambert-St Louis
14h 49m
2 stops
SJO7:52 pmSan José Juan Santamaria Intl
Sep 3
SJO6:00 amSan José Juan Santamaria Intl
16h 23m
2 stops
STL11:23 pmLambert-St Louis
$401
American Airlines
Jun 5
STL5:30 amLambert-St Louis
18h 13m
1 stop
SJO10:43 pmSan José Juan Santamaria Intl
Jun 10
SJO11:59 pmSan José Juan Santamaria Intl
7h 51m
1 stop
STL8:50 amLambert-St Louis
$426

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 May 7, 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

Fri 7/24

4:09 pm-8:20 am

1 stop17h 11m

San José Juan Santamaria Intl

Sun 7/26

9:35 am-11:59 pm

1 stop13h 24m

$358
Quickest round-trip

St. LouisSan José

STL - SJO

STLSJO

Lambert-St Louis

Sat 6/20

4:17 pm-8:20 am

1 stop17h 03m

San José Juan Santamaria Intl

Sat 7/11

9:35 am-11:59 pm

1 stop13h 24m

$368

St. LouisSan José

STL - SJO

STLSJO

Lambert-St Louis

Sun 8/30

4:10 pm-8:20 am

1 stop17h 10m

San José Juan Santamaria Intl

Thu 9/3

9:35 am-12:14 am

1 stop13h 39m

$369

St. LouisSan José

STL - SJO

STLSJO

Lambert-St Louis

Sat 7/25

4:09 pm-8:20 am

1 stop17h 11m

San José Juan Santamaria Intl

Sat 8/1

9:35 am-11:59 pm

1 stop13h 24m

$372

St. LouisSan José

STL - SJO

STLSJO

Lambert-St Louis

Thu 8/20

4:10 pm-8:20 am

1 stop17h 10m

San José Juan Santamaria Intl

Mon 8/24

9:35 am-12:14 am

1 stop13h 39m

$378

St. LouisSan José

STL - SJO

STLSJO

Lambert-St Louis

Sat 6/20

4:17 pm-8:20 am

1 stop17h 03m

San José Juan Santamaria Intl

Sat 7/11

9:35 am-11:59 pm

1 stop13h 24m

$389

St. LouisSan José

STL - SJO

STLSJO

Lambert-St Louis

Sun 5/31

8:36 am-10:42 pm

1 stop15h 06m

San José Juan Santamaria Intl

Fri 6/5

2:00 pm-8:38 am

1 stop17h 38m

$396

St. LouisSan José

STL - SJO

STLSJO

Lambert-St Louis

Sun 8/30

6:03 am-7:52 pm

2 stops14h 49m

San José Juan Santamaria Intl

Thu 9/3

6:00 am-11:23 pm

2 stops16h 23m

$401

St. LouisSan José

STL - SJO

STLSJO

Lambert-St Louis

Sat 6/20

4:17 pm-8:20 am

1 stop17h 03m

San José Juan Santamaria Intl

Sat 7/11

9:35 am-5:37 pm

2 stops31h 02m

$403

St. LouisSan José

STL - SJO

STLSJO

Lambert-St Louis

Sat 7/25

4:09 pm-8:20 am

1 stop17h 11m

San José Juan Santamaria Intl

Sat 8/1

9:35 am-5:37 pm

2 stops31h 02m

$416

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 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 typical price of a round-trip flight between St. Louis and San José?

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 $417.

How far in advance should I book a flight from St. Louis 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 $574 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 $403 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 51m

Direct flights

None
The fastest flight from St. Louis to San José takes 6h 51m
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

Frequently asked questions about flying from St. Louis to San José

  • 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 51m.

  • 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 $326Free CancellationRating
7.9
8,459 reviews
Search Delta flights
American AirlinesPriceFrom $331Free CancellationRating
7.1
11,669 reviews
Search American Airlines flights
SouthwestPriceFrom $383Free CancellationRating
7.9
4,301 reviews
Search Southwest flights
United AirlinesPriceFrom $386Free CancellationRating
7.4
9,692 reviews
Search United Airlines flights
GOLPriceFrom $644Free CancellationRating
7.3
1,214 reviews
Search GOL 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.

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