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Cheap flights from St. Louis to San José from $183

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 1/5. 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
5:11 pm - 1:48 pm
STL
-
SJO
20h 37m2 stops
Multiple Airlines Logo
12:33 pm - 8:05 am
SJO
-
STL
19h 32m1 stop
$293Multiple Airlines
Tue, Jan 6 - Sun, Jan 11
Multiple Airlines Logo
3:43 pm - 12:14 pm
STL
-
SJO
20h 31m1 stop
Multiple Airlines Logo
12:33 pm - 6:51 am
SJO
-
STL
18h 18m2 stops
$297Multiple Airlines
Fri, Jan 9 - Tue, Jan 13
Multiple Airlines Logo
3:43 pm - 12:14 pm
STL
-
SJO
20h 31m1 stop
Multiple Airlines Logo
12:33 pm - 8:05 am
SJO
-
STL
19h 32m1 stop
$299Multiple Airlines
Fri, Jan 9 - Sun, Jan 11
Multiple Airlines Logo
5:11 pm - 12:22 pm
STL
-
SJO
19h 11m2 stops
Multiple Airlines Logo
12:33 pm - 8:05 am
SJO
-
STL
19h 32m1 stop
$301Multiple Airlines
Wed, Jan 7 - Sun, Jan 11
Multiple Airlines Logo
5:11 pm - 11:42 am
STL
-
SJO
18h 31m1 stop
Multiple Airlines Logo
12:33 pm - 6:51 am
SJO
-
STL
18h 18m2 stops
$306Multiple Airlines
Tue, Jan 6 - Tue, Jan 13
Multiple Airlines Logo
5:11 pm - 11:42 am
STL
-
SJO
18h 31m1 stop
Multiple Airlines Logo
12:33 pm - 8:05 am
SJO
-
STL
19h 32m1 stop
$308Multiple Airlines
Tue, Jan 6 - Sun, Jan 11
Frontier Logo
3:43 pm - 12:14 pm
STL
-
SJO
20h 31m1 stop
Frontier Logo
2:58 pm - 10:34 pm
SJO
-
STL
31h 36m2 stops
$315Frontier
Fri, Jan 9 - Mon, Jan 12
Multiple Airlines Logo
5:11 pm - 11:42 am
STL
-
SJO
18h 31m1 stop
Multiple Airlines Logo
1:30 pm - 10:34 pm
SJO
-
STL
33h 04m2 stops
$316Multiple Airlines
Tue, Jan 6 - Wed, Jan 14
Multiple Airlines Logo
5:11 pm - 11:37 am
STL
-
SJO
18h 26m1 stop
Multiple Airlines Logo
12:33 pm - 6:51 am
SJO
-
STL
18h 18m2 stops
$318Multiple Airlines
Thu, Jan 8 - Tue, Jan 13
Multiple Airlines Logo
5:11 pm - 11:37 am
STL
-
SJO
18h 26m1 stop
Multiple Airlines Logo
12:33 pm - 8:05 am
SJO
-
STL
19h 32m1 stop
$321Multiple Airlines
Thu, Jan 8 - Sun, Jan 11

Frontier flights from St. Louis to San José

Our best Frontier deals on St. Louis to San José flight tickets
Frontier
Jan 9
STL3:43 pmLambert-St Louis
20h 31m
1 stop
SJO12:14 pmSan José Juan Santamaria Intl
Jan 12
SJO2:58 pmSan José Juan Santamaria Intl
31h 36m
2 stops
STL10:34 pmLambert-St Louis
$315
Find similar
Frontier
Dec 18
STL10:42 amLambert-St Louis
27h 00m
1 stop
SJO1:42 pmSan José Juan Santamaria Intl
Dec 24
SJO2:52 pmSan José Juan Santamaria Intl
18h 48m
1 stop
STL9:40 amLambert-St Louis
$566
Find similar
Frontier
Dec 18
STL10:42 amLambert-St Louis
27h 00m
1 stop
SJO1:42 pmSan José Juan Santamaria Intl
Dec 26
SJO2:57 pmSan José Juan Santamaria Intl
31h 36m
2 stops
STL10:33 pmLambert-St Louis
$698
Find similar

American Airlines flights from St. Louis to San José

Our best American Airlines deals on St. Louis to San José flight tickets
American Airlines
Apr 6
STL5:12 amLambert-St Louis
9h 41m
1 stop
SJO1:53 pmSan José Juan Santamaria Intl
Apr 21
SJO2:25 pmSan José Juan Santamaria Intl
17h 51m
1 stop
STL9:16 amLambert-St Louis
$360
Find similar
American Airlines
Apr 6
STL6:20 pmLambert-St Louis
17h 50m
1 stop
SJO11:10 amSan José Juan Santamaria Intl
Apr 21
SJO7:10 amSan José Juan Santamaria Intl
12h 37m
2 stops
STL8:47 pmLambert-St Louis
$364
Find similar
American Airlines
May 9
STL6:00 pmLambert-St Louis
20h 09m
1 stop
SJO1:09 pmSan José Juan Santamaria Intl
May 20
SJO1:00 pmSan José Juan Santamaria Intl
7h 35m
1 stop
STL9:35 pmLambert-St Louis
$367
Find similar

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 December 11, 2025.
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

Tue 1/6

5:11 pm-1:48 pm

2 stops20h 37m

San José Juan Santamaria Intl

Sun 1/11

12:33 pm-8:05 am

1 stop19h 32m

$293

St. LouisSan José

STL - SJO

STLSJO

Lambert-St Louis

Fri 1/9

3:43 pm-12:14 pm

1 stop20h 31m

San José Juan Santamaria Intl

Tue 1/13

12:33 pm-6:51 am

2 stops18h 18m

$297

St. LouisSan José

STL - SJO

STLSJO

Lambert-St Louis

Fri 1/9

3:43 pm-12:14 pm

1 stop20h 31m

San José Juan Santamaria Intl

Sun 1/11

12:33 pm-8:05 am

1 stop19h 32m

$299

St. LouisSan José

STL - SJO

STLSJO

Lambert-St Louis

Wed 1/7

5:11 pm-12:22 pm

2 stops19h 11m

San José Juan Santamaria Intl

Sun 1/11

12:33 pm-8:05 am

1 stop19h 32m

$301

St. LouisSan José

STL - SJO

STLSJO

Lambert-St Louis

Tue 1/6

5:11 pm-11:42 am

1 stop18h 31m

San José Juan Santamaria Intl

Tue 1/13

12:33 pm-6:51 am

2 stops18h 18m

$306

St. LouisSan José

STL - SJO

STLSJO

Lambert-St Louis

Tue 1/6

5:11 pm-11:42 am

1 stop18h 31m

San José Juan Santamaria Intl

Sun 1/11

12:33 pm-8:05 am

1 stop19h 32m

$308

St. LouisSan José

STL - SJO

STLSJO

Lambert-St Louis

Fri 1/9

3:43 pm-12:14 pm

1 stop20h 31m

San José Juan Santamaria Intl

Mon 1/12

2:58 pm-10:34 pm

2 stops31h 36m

$315

St. LouisSan José

STL - SJO

STLSJO

Lambert-St Louis

Tue 1/6

5:11 pm-11:42 am

1 stop18h 31m

San José Juan Santamaria Intl

Wed 1/14

1:30 pm-10:34 pm

2 stops33h 04m

$316

St. LouisSan José

STL - SJO

STLSJO

Lambert-St Louis

Thu 1/8

5:11 pm-11:37 am

1 stop18h 26m

San José Juan Santamaria Intl

Tue 1/13

12:33 pm-6:51 am

2 stops18h 18m

$318

St. LouisSan José

STL - SJO

STLSJO

Lambert-St Louis

Thu 1/8

5:11 pm-11:37 am

1 stop18h 26m

San José Juan Santamaria Intl

Sun 1/11

12:33 pm-8:05 am

1 stop19h 32m

$321

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.

What is the cheapest day to depart on your flight to San José?

On average, the least expensive day to fly to San José from St. Louis is on a Tuesday. momondo users have found tickets for Tuesday departures for as low as $519. However, this price may fluctuate depending on the airline, the season, and holidays. Flights from St. Louis to San José on a Saturday will generally be more expensive and average around $687. Keep in mind that these prices on both days could fluctuate depending on the season and the demand.

What is the cheapest time of day to depart on your flight to San José?

Our data shows that the cheapest St. Louis to San José flights are usually those with departure times in the evening. Our users have found flights to San José in the evening for as low as $427. Flights at noon are often more expensive with an average ticket price of $604.

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 $592 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 $444 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 $257Free CancellationRating
7.9
8,008 reviews
Search Delta flights
American AirlinesPriceFrom $336Free CancellationRating
7.2
11,050 reviews
Search American Airlines flights
SouthwestPriceFrom $383Free CancellationRating
7.9
4,253 reviews
Search Southwest flights
United AirlinesPriceFrom $386Free CancellationRating
7.4
9,095 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
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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