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Cheap flights from St. Louis to San José from $128

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 2/23. 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.
Multiple Airlines Logo
3:49 pm - 11:40 am
STL
-
SJO
19h 51m
1 stop
Multiple Airlines Logo
11:35 am - 11:19 pm
SJO
-
STL
10h 44m
1 stop
$282Multiple Airlines
Mon, Mar 2 - Tue, Mar 10
Multiple Airlines Logo
8:22 pm - 12:22 pm
STL
-
SJO
16h 00m
2 stops
Multiple Airlines Logo
11:35 am - 11:19 pm
SJO
-
STL
10h 44m
1 stop
$291Multiple Airlines
Mon, Mar 2 - Tue, Mar 10
Multiple Airlines Logo
3:49 pm - 11:40 am
STL
-
SJO
19h 51m
1 stop
Multiple Airlines Logo
11:35 am - 1:19 pm
SJO
-
STL
24h 44m
2 stops
$320Multiple Airlines
Sat, Feb 28 - Sun, Mar 8
Multiple Airlines Logo
8:10 pm - 10:42 am
STL
-
SJO
15h 32m
1 stop
Multiple Airlines Logo
12:19 pm - 10:32 am
SJO
-
STL
21h 13m
2 stops
$348Multiple Airlines
Mon, Mar 16 - Mon, Mar 23
Multiple Airlines Logo
12:36 pm - 11:40 am
STL
-
SJO
23h 04m
1 stop
Multiple Airlines Logo
11:35 am - 7:02 am
SJO
-
STL
18h 27m
1 stop
$356Multiple Airlines
Sat, Feb 28 - Sun, Mar 8
American Airlines Logo
6:53 pm - 11:25 am
STL
-
SJO
17h 32m
1 stop
American Airlines Logo
11:59 pm - 8:50 am
SJO
-
STL
7h 51m
1 stop
$360American Airlines
Sat, May 16 - Thu, May 21
American Airlines Logo
6:53 pm - 11:25 am
STL
-
SJO
17h 32m
1 stop
American Airlines Logo
11:35 pm - 6:30 pm
SJO
-
STL
17h 55m
1 stop
$376American Airlines
Sat, May 9 - Wed, May 20
American Airlines Logo
6:53 pm - 11:25 am
STL
-
SJO
17h 32m
1 stop
American Airlines Logo
12:10 pm - 11:56 pm
SJO
-
STL
10h 46m
2 stops
$381American Airlines
Sat, May 9 - Wed, May 20
Delta Logo
7:10 am - 10:02 pm
STL
-
SJO
14h 52m
1 stop
Delta Logo
7:00 am - 3:56 pm
SJO
-
STL
8h 56m
1 stop
$385Delta
Wed, Mar 4 - Sat, Mar 7
American Airlines Logo
5:12 am - 1:55 pm
STL
-
SJO
9h 43m
1 stop
American Airlines Logo
2:08 pm - 8:54 am
SJO
-
STL
17h 46m
1 stop
$392American Airlines
Mon, Apr 6 - Tue, Apr 21

Delta flights from St. Louis to San José

Our best Delta deals on St. Louis to San José flight tickets
Delta
Mar 4
STL7:10 amLambert-St Louis
14h 52m
1 stop
SJO10:02 pmSan José Juan Santamaria Intl
Mar 7
SJO7:00 amSan José Juan Santamaria Intl
13h 06m
1 stop
STL8:06 pmLambert-St Louis
$385
Delta
Feb 24
STL10:13 amLambert-St Louis
11h 49m
1 stop
SJO10:02 pmSan José Juan Santamaria Intl
Mar 3
SJO7:00 amSan José Juan Santamaria Intl
7h 47m
1 stop
STL2:47 pmLambert-St Louis
$393

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 16
STL6:53 pmLambert-St Louis
17h 32m
1 stop
SJO11:25 amSan José Juan Santamaria Intl
May 21
SJO11:59 pmSan José Juan Santamaria Intl
17h 31m
1 stop
STL6:30 pmLambert-St Louis
$360
American Airlines
May 9
STL6:53 pmLambert-St Louis
17h 32m
1 stop
SJO11:25 amSan José Juan Santamaria Intl
May 20
SJO11:35 pmSan José Juan Santamaria Intl
15h 58m
1 stop
STL4:33 pmLambert-St Louis
$376
American Airlines
May 9
STL6:53 pmLambert-St Louis
17h 32m
1 stop
SJO11:25 amSan José Juan Santamaria Intl
May 20
SJO6:30 amSan José Juan Santamaria Intl
14h 49m
2 stops
STL10:19 pmLambert-St Louis
$381

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 February 3, 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

St. LouisSan José

STL - SJO

STLSJO

Lambert-St Louis

Mon 3/2

3:49 pm-11:40 am

1 stop19h 51m

San José Juan Santamaria Intl

Tue 3/10

11:35 am-11:19 pm

1 stop10h 44m

$282

St. LouisSan José

STL - SJO

STLSJO

Lambert-St Louis

Mon 3/2

8:22 pm-12:22 pm

2 stops16h 00m

San José Juan Santamaria Intl

Tue 3/10

11:35 am-11:19 pm

1 stop10h 44m

$291

St. LouisSan José

STL - SJO

STLSJO

Lambert-St Louis

Sat 2/28

3:49 pm-11:40 am

1 stop19h 51m

San José Juan Santamaria Intl

Sun 3/8

11:35 am-1:19 pm

2 stops24h 44m

$320

St. LouisSan José

STL - SJO

STLSJO

Lambert-St Louis

Mon 3/16

8:10 pm-10:42 am

1 stop15h 32m

San José Juan Santamaria Intl

Mon 3/23

12:19 pm-10:32 am

2 stops21h 13m

$348

St. LouisSan José

STL - SJO

STLSJO

Lambert-St Louis

Sat 2/28

12:36 pm-11:40 am

1 stop23h 04m

San José Juan Santamaria Intl

Sun 3/8

11:35 am-7:02 am

1 stop18h 27m

$356

St. LouisSan José

STL - SJO

STLSJO

Lambert-St Louis

Sat 5/16

6:53 pm-11:25 am

1 stop17h 32m

San José Juan Santamaria Intl

Thu 5/21

11:59 pm-8:50 am

1 stop7h 51m

$360

St. LouisSan José

STL - SJO

STLSJO

Lambert-St Louis

Sat 5/9

6:53 pm-11:25 am

1 stop17h 32m

San José Juan Santamaria Intl

Wed 5/20

11:35 pm-6:30 pm

1 stop17h 55m

$376

St. LouisSan José

STL - SJO

STLSJO

Lambert-St Louis

Sat 5/9

6:53 pm-11:25 am

1 stop17h 32m

San José Juan Santamaria Intl

Wed 5/20

12:10 pm-11:56 pm

2 stops10h 46m

$381

St. LouisSan José

STL - SJO

STLSJO

Lambert-St Louis

Wed 3/4

7:10 am-10:02 pm

1 stop14h 52m

San José Juan Santamaria Intl

Sat 3/7

7:00 am-3:56 pm

1 stop8h 56m

$385

St. LouisSan José

STL - SJO

STLSJO

Lambert-St Louis

Mon 4/6

5:12 am-1:55 pm

1 stop9h 43m

San José Juan Santamaria Intl

Tue 4/21

2:08 pm-8:54 am

1 stop17h 46m

$392

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, October 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 $417. If you don’t want to visit San José in October, then you should wait until September to fly from St. Louis, when ticket prices are also cheap, with an average price of $435.

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 $561 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 $427 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 30m

Direct flights

None
The fastest flight from St. Louis to San José takes 6h 30m
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 30m.

  • 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 $209Free CancellationRating
7.9
8,138 reviews
Search Delta flights
American AirlinesPriceFrom $336Free CancellationRating
7.2
11,216 reviews
Search American Airlines flights
SouthwestPriceFrom $376Free CancellationRating
8.0
4,272 reviews
Search Southwest flights
United AirlinesPriceFrom $379Free CancellationRating
7.4
9,236 reviews
Search United Airlines 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
Dominical
San Gerardo de Dota
Santa Elena
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

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