$115 Cheap Flights from St. Louis (STL) to San José (SJO)

View $115 flight on Sun, Oct 12, 2025Opens in a new window

Popular airlines from St. Louis Lambert Intl. Airport (STL) to Juan Santamaria Intl. Airport (SJO)

Cheap Flights from St. Louis to San José (STL-SJO)

Prices were available within the past 7 days and start at $115 for one-way flights and $262 for round trip, for the period specified. Prices and availability are subject to change. Additional terms apply.

Southwest Airlines
Tue, Oct 14 - Tue, Oct 21
STL
St. Louis
SJO
San José
$262 Roundtrip, found 2 hours ago
$262
Roundtrip
found 2 hours ago
Select Southwest Airlines flight, departing Tue, Oct 14 from St. Louis to San José, returning Tue, Oct 21, priced at $262 found 2 hours ago
American Airlines
Tue, Nov 18 - Tue, Nov 25
STL
St. Louis
SJO
San José
$266 Roundtrip, found 3 days ago
$266
Roundtrip
found 3 days ago
Select American Airlines flight, departing Tue, Nov 18 from St. Louis to San José, returning Tue, Nov 25, priced at $266 found 3 days ago
Southwest Airlines
Tue, Oct 14 - Tue, Oct 21
STL
St. Louis
SJO
San José
$267 Roundtrip, found 2 hours ago
$267
Roundtrip
found 2 hours ago
Select Southwest Airlines flight, departing Tue, Oct 14 from St. Louis to San José, returning Tue, Oct 21, priced at $267 found 2 hours ago
Southwest Airlines
Tue, Oct 14 - Tue, Oct 21
STL
St. Louis
SJO
San José
$269 Roundtrip, found 2 hours ago
$269
Roundtrip
found 2 hours ago
Select Southwest Airlines flight, departing Tue, Oct 14 from St. Louis to San José, returning Tue, Oct 21, priced at $269 found 2 hours ago
American Airlines
Tue, Nov 18 - Tue, Nov 25
STL
St. Louis
SJO
San José
$271 Roundtrip, found 3 days ago
$271
Roundtrip
found 3 days ago
Select American Airlines flight, departing Tue, Nov 18 from St. Louis to San José, returning Tue, Nov 25, priced at $271 found 3 days ago
American Airlines
Mon, Sep 15 - Tue, Sep 23
STL
St. Louis
SJO
San José
$272 Roundtrip, found 2 days ago
$272
Roundtrip
found 2 days ago
Select American Airlines flight, departing Mon, Sep 15 from St. Louis to San José, returning Tue, Sep 23, priced at $272 found 2 days ago
American Airlines
Tue, Nov 4 - Wed, Nov 12
STL
St. Louis
SJO
San José
$274 Roundtrip, found 3 days ago
$274
Roundtrip
found 3 days ago
Select American Airlines flight, departing Tue, Nov 4 from St. Louis to San José, returning Wed, Nov 12, priced at $274 found 3 days ago
Delta
Tue, Nov 18 - Tue, Nov 25
STL
St. Louis
SJO
San José
$278 Roundtrip, found 3 days ago
$278
Roundtrip
found 3 days ago
Select Delta flight, departing Tue, Nov 18 from St. Louis to San José, returning Tue, Nov 25, priced at $278 found 3 days ago
United
Wed, Oct 8 - Tue, Oct 14
STL
St. Louis
SJO
San José
$279 Roundtrip, found 5 hours ago
$279
Roundtrip
found 5 hours ago
Select United flight, departing Wed, Oct 8 from St. Louis to San José, returning Tue, Oct 14, priced at $279 found 5 hours ago
Spirit Airlines
Sat, Jan 31 - Sat, Feb 7
STL
St. Louis
SJO
San José
$362 Roundtrip, found 3 days ago
$362
Roundtrip
found 3 days ago
Select Spirit Airlines flight, departing Sat, Jan 31 from St. Louis to San José, returning Sat, Feb 7, priced at $362 found 3 days ago

Find the cheapest month to fly from St. Louis (STL) to San José (SJO)

September is typically the cheapest month to fly

From $275 - $1,231 per traveler.

Graph displaying average flight prices per month

Alternative airports near San José

Prices were available within the past 7 days. Prices and availability are subject to change.

Select flight to Juan Santamaria Intl. SJO. Cheapest option available. Average driving time to city center is 20 minutes. Flights from $451
SJO
Juan Santamaria Intl.
Cheapest
Average driving time to city center20 min
Flights from $451
Flights from St. Louis (STL) to San José (SJO)
Origin airport
Lambert-St. Louis Intl.
Destination airport
Juan Santamaría Intl.
Airlines serving
Air Canada, Alaska Airlines, American Airlines, Copa, Delta, Southwest Airlines, Spirit Airlines, United, avianca
Roundtrip price
$262
Distance
2022 mi

St. Louis to San José Flights

The cheapest times to fly from St. Louis to San José

On average, Thursday can be the cheapest time to fly, according to data from the Airlines Reporting Corporation (ARC), one of the world's biggest databases for global airline sales. The data reveals that you could save up to 16% by flying on a Thursday—the cheapest day to travel on average—instead of a Sunday—the most expensive. Some of the most affordable flights from St. Louis to San José are during the month of October. You can find some of the cheapest flights from St. Louis to San José with Expedia's search tool and vast selection of airlines.

 

The best time to book a flight from St. Louis to San José

Sunday is one of the best days to book for cheap flights from St. Louis to San José: Tickets reserved on a Sunday cost between 6% and 13% less than those reserved on a Friday, according to ARC data. The data also suggests booking early can also lead to cheaper airfares. You could save 24% by buying your tickets for domestic flights at least a month in advance and 10% by booking international flights 2 months in advance.

 

How to find cheap round-trip tickets from St. Louis to San José

Being flexible with your dates and using Expedia's Price Drop Protection and Price Tracking features are some of the best ways of finding a cheap ticket from St. Louis to San José in 2025. You can also book with separate airlines for your outbound and return journeys, from $115 one-way. Expedia also offers Price Drop Protection, so if the cost of your airfare goes down after booking, you'll receive a credit for the difference*. This is available for a small fee, and is free to One Key Gold and Platinum tier members.

 

Expedia's Price Tracking feature means you can stay on top of airfares without manually checking every day. It sends you automated price alerts for cheap St. Louis to San José flights and uses historical data to indicate when the best time to book is. Download Expedia's free app to activate this handy tool in a few easy taps.

 

You could also save big by booking one of Expedia's vacation packages. Bundling together your St. Louis to San José airfare with your accommodations and car rental is often cheaper than booking everything separately. There’s also One Key, Expedia's generous rewards program. Join for free and you could earn One Key cash on most bookings to save on future adventures.

 

*Terms apply.

 

Disclaimer: ARC The statistics are based on average round-trip ticket prices between January and August 2023. The percentages you see are averages.

 

Frequently asked questions

How much does a flight from Lambert-St. Louis Intl. Airport (STL) to Juan Santamaria Intl. Airport (SJO) cost?
Lock in a cheap one-way flight from $115 or cheap return flight from $262 from Lambert-St. Louis Intl. Airport (STL) to Juan Santamaria Intl. Airport (SJO) with Expedia. Enter your travel dates and sort by "Price (lowest to highest)" to see our cheapest flight offers on this route.
What is the cheapest month to fly from Lambert-St. Louis Intl. Airport (STL) to Juan Santamaria Intl. Airport (SJO)?
The cheapest month to fly from STL to SJO is October, when there's less demand. Off-peak season is often when you'll find cheap fares for travel between these airports.
What is the cheapest airline that flies from Lambert-St. Louis Intl. Airport (STL) to Juan Santamaria Intl. Airport (SJO)?
Use the filter tool on Expedia to compare different airlines and find the most affordable carrier that'll fly you from STL to SJO. Then, sort your results by "Price (lowest to highest)" to pick up the best deal available.
How many flights per day from Lambert-St. Louis Intl. Airport (STL) to Juan Santamaria Intl. Airport (SJO)?
You'll need to catch a flight with a layover if you're traveling from Lambert-St. Louis Intl. Airport (STL) to Juan Santamaria Intl. Airport (SJO). There are no daily direct flights on this route. However, just filter your search to include one or more stops to find the best option for your trip.
What day of the week has the most flights from STL to SJO?
Typically you'll find the widest variety of flight choices on a Friday. Tuesdays are often the quietest.* But this can vary based on the airline, season and other factors.*Busiest/quietest day to travel is based on Expedia flight demand through January to December 2024.
What is the best time to fly from Lambert-St. Louis Intl. Airport (STL) to Juan Santamaria Intl. Airport (SJO)?
To reach Juan Santamaria Intl. Airport (SJO) on schedule, select a flight that leaves from Lambert-St. Louis Intl. Airport (STL) before 3 PM. The likelihood of cancellations is 22% higher, on average, for departures after this time.**Most reliable time of the day and month to travel recommendation is based on January through August 2024 flight status data sourced from OAG's global flight data platform.
Is it cheaper to buy a plane ticket from Lambert-St. Louis Intl. Airport (STL) to Juan Santamaria Intl. Airport (SJO) last-minute?
Booking your plane ticket from STL to SJO just before your journey is typically more expensive. However, if you're flexible with your travel times and dates, you could snag a cheap last-minute fare.
Is it cheaper to book a STL to SJO flight and hotel package?
Booking a STL to SJO flight and hotel package is usually cheaper than booking separately. With Expedia, you can enjoy the ease of organizing your trip all in one place. Choose from our wide range of accommodations and then add activities, car rentals and flights to your booking. Bundle everything together, and you could save hundreds of dollars.
Can I cancel or change the date of my flight from Lambert-St. Louis Intl. Airport (STL) to Juan Santamaria Intl. Airport (SJO)?
It's generally possible to reschedule or cancel your STL to SJO flight. However, for bookings made more than 24 hours ago, additional fees may apply. Refer to your airline's policies in your itinerary to see what changes are allowed and whether any costs are involved. You'll also find more details on our Customer Service portal.

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*Available to One Key members.