Latest deals
Insights
When to book
FAQs
Reviews
Price Alerts

Cheap flights from St. Louis to San José from $218

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 7/1. 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 St. Louis to San José

Cheap round-trip flights

Enter your travel dates to find the best prices.
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
$498Frontier
Fri, Jul 3 - Sun, Jul 12
Frontier Logo
7:03 pm - 8:20 am
STL
-
SJO
14h 17m
2 stops
Frontier Logo
9:35 am - 11:59 pm
SJO
-
STL
13h 24m
1 stop
$506Frontier
Wed, Aug 5 - Thu, Aug 13
Delta Logo
6:00 am - 11:49 am
STL
-
SJO
6h 49m
1 stop
Delta Logo
1:14 pm - 11:58 pm
SJO
-
STL
9h 44m
1 stop
$510Delta
Sun, Aug 30 - Thu, Sep 3
Southwest Logo
5:10 am - 12:45 pm
STL
-
SJO
8h 35m
1 stop
Southwest Logo
9:00 am - 7:55 pm
SJO
-
STL
9h 55m
1 stop
$512Southwest
Mon, Aug 31 - Wed, Sep 9
American Airlines Logo
5:42 am - 1:52 pm
STL
-
SJO
9h 10m
1 stop
American Airlines Logo
2:57 pm - 10:20 am
SJO
-
STL
18h 23m
2 stops
$515American Airlines
Mon, Aug 31 - Wed, Sep 9
Frontier Logo
7:10 pm - 8:20 am
STL
-
SJO
14h 10m
2 stops
Frontier Logo
9:35 am - 11:59 pm
SJO
-
STL
13h 24m
1 stop
$519Frontier
Sat, Aug 1 - Thu, Aug 13
American Airlines Logo
5:00 am - 12:03 pm
STL
-
SJO
8h 03m
1 stop
American Airlines Logo
2:56 pm - 9:32 am
SJO
-
STL
17h 36m
2 stops
$525American Airlines
Wed, Aug 12 - Tue, Aug 18
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
$528Frontier
Wed, Jul 1 - Thu, Jul 30
American Airlines Logo
5:00 am - 12:03 pm
STL
-
SJO
8h 03m
1 stop
American Airlines Logo
2:56 pm - 10:39 am
SJO
-
STL
18h 43m
1 stop
$532American Airlines
Wed, Aug 12 - Tue, Aug 18
Frontier Logo
4:09 pm - 8:20 am
STL
-
SJO
17h 11m
1 stop
Frontier Logo
9:35 am - 8:57 am
SJO
-
STL
46h 22m
2 stops
$534Frontier
Sat, Aug 1 - Thu, Aug 6

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

Southwest flights from St. Louis to San José

Our best Southwest deals on St. Louis to San José flight tickets
Southwest
Aug 31
STL5:10 amLambert-St Louis
8h 35m
1 stop
SJO12:45 pmSan José Juan Santamaria Intl
Sep 9
SJO9:00 amSan José Juan Santamaria Intl
9h 55m
1 stop
STL7:55 pmLambert-St Louis
$512
Southwest
Nov 9
STL8:25 pmLambert-St Louis
16h 50m
2 stops
SJO1:15 pmSan José Juan Santamaria Intl
Nov 16
SJO9:00 amSan José Juan Santamaria Intl
12h 55m
2 stops
STL9:55 pmLambert-St Louis
$563
Southwest
Aug 26
STL8:40 amLambert-St Louis
11h 00m
1 stop
SJO6:40 pmSan José Juan Santamaria Intl
Aug 31
SJO1:40 pmSan José Juan Santamaria Intl
7h 10m
1 stop
STL9:50 pmLambert-St Louis
$601

United Airlines flights from St. Louis to San José

Our best United Airlines deals on St. Louis to San José flight tickets
United Airlines
Oct 30
STL11:00 amLambert-St Louis
9h 39m
1 stop
SJO7:39 pmSan José Juan Santamaria Intl
Nov 2
SJO12:35 pmSan José Juan Santamaria Intl
9h 45m
1 stop
STL10:20 pmLambert-St Louis
$602
United Airlines
Jul 1
STL6:14 amLambert-St Louis
7h 07m
1 stop
SJO12:21 pmSan José Juan Santamaria Intl
Jul 6
SJO12:44 pmSan José Juan Santamaria Intl
10h 00m
1 stop
STL11:44 pmLambert-St Louis
$727
United Airlines
Jul 3
STL12:23 pmLambert-St Louis
8h 56m
1 stop
SJO8:19 pmSan José Juan Santamaria Intl
Jul 6
SJO12:44 pmSan José Juan Santamaria Intl
10h 00m
1 stop
STL11:44 pmLambert-St Louis
$736

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 June 20, 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 7/3

4:17 pm-8:20 am

1 stop17h 03m

San José Juan Santamaria Intl

Sun 7/12

9:35 am-11:59 pm

1 stop13h 24m

$498

St. LouisSan José

STL - SJO

STLSJO

Lambert-St Louis

Wed 8/5

7:03 pm-8:20 am

2 stops14h 17m

San José Juan Santamaria Intl

Thu 8/13

9:35 am-11:59 pm

1 stop13h 24m

$506
Quickest round-trip

St. LouisSan José

STL - SJO

STLSJO

Lambert-St Louis

Sun 8/30

6:00 am-11:49 am

1 stop6h 49m

San José Juan Santamaria Intl

Thu 9/3

1:14 pm-11:58 pm

1 stop9h 44m

$510

St. LouisSan José

STL - SJO

STLSJO

Lambert-St Louis

Mon 8/31

5:10 am-12:45 pm

1 stop8h 35m

San José Juan Santamaria Intl

Wed 9/9

9:00 am-7:55 pm

1 stop9h 55m

$512

St. LouisSan José

STL - SJO

STLSJO

Lambert-St Louis

Mon 8/31

5:42 am-1:52 pm

1 stop9h 10m

San José Juan Santamaria Intl

Wed 9/9

2:57 pm-10:20 am

2 stops18h 23m

$515

St. LouisSan José

STL - SJO

STLSJO

Lambert-St Louis

Sat 8/1

7:10 pm-8:20 am

2 stops14h 10m

San José Juan Santamaria Intl

Thu 8/13

9:35 am-11:59 pm

1 stop13h 24m

$519

St. LouisSan José

STL - SJO

STLSJO

Lambert-St Louis

Wed 8/12

5:00 am-12:03 pm

1 stop8h 03m

San José Juan Santamaria Intl

Tue 8/18

2:56 pm-9:32 am

2 stops17h 36m

$525

St. LouisSan José

STL - SJO

STLSJO

Lambert-St Louis

Wed 7/1

4:17 pm-8:20 am

1 stop17h 03m

San José Juan Santamaria Intl

Thu 7/30

9:35 am-11:59 pm

1 stop13h 24m

$528

St. LouisSan José

STL - SJO

STLSJO

Lambert-St Louis

Wed 8/12

5:00 am-12:03 pm

1 stop8h 03m

San José Juan Santamaria Intl

Tue 8/18

2:56 pm-10:39 am

1 stop18h 43m

$532

St. LouisSan José

STL - SJO

STLSJO

Lambert-St Louis

Sat 8/1

4:09 pm-8:20 am

1 stop17h 11m

San José Juan Santamaria Intl

Thu 8/6

9:35 am-8:57 am

2 stops46h 22m

$534

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 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, November 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 $399. If you don’t want to visit San José in November, 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 $558 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 $437 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

7h 10m

Direct flights

None
The fastest flight from St. Louis to San José takes 7h 10m
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 7h 10m.

  • 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
American AirlinesPriceFrom $331Free CancellationRating
7.1
11,721 reviews
Search American Airlines flights
DeltaPriceFrom $359Free CancellationRating
7.8
8,422 reviews
Search Delta flights
SouthwestPriceFrom $383Free CancellationRating
7.9
4,242 reviews
Search Southwest flights
United AirlinesPriceFrom $386Free CancellationRating
7.4
9,866 reviews
Search United Airlines flights
GOLPriceFrom $644Free CancellationRating
7.3
1,235 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.

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
Mon 7/20
Mon 7/27
By creating a price alert you accept our terms of use and privacy policy.

Find better results for your trip to Costa Rica