$163 Cheap Flights from San José (SJO) to St. Louis (STL)

View $163 flight on Thu, Jan 29, 2026Opens in a new window

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

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

Prices were available within the past 7 days and start at $163 for one-way flights and $319 for round trip, for the period specified. Prices and availability are subject to change. Additional terms apply.

American Airlines
Tue, Nov 11 - Thu, Nov 13
SJO
San José
STL
St. Louis
$319 Roundtrip, found 1 day ago
$319
Roundtrip
found 1 day ago
Select American Airlines flight, departing Tue, Nov 11 from San José to St. Louis, returning Thu, Nov 13, priced at $319 found 1 day ago
United
Tue, Nov 11 - Thu, Nov 13
SJO
San José
STL
St. Louis
$319 Roundtrip, found 1 day ago
$319
Roundtrip
found 1 day ago
Select United flight, departing Tue, Nov 11 from San José to St. Louis, returning Thu, Nov 13, priced at $319 found 1 day ago
American Airlines
Tue, Nov 11 - Thu, Nov 13
SJO
San José
STL
St. Louis
$327 Roundtrip, found 1 day ago
$327
Roundtrip
found 1 day ago
Select American Airlines flight, departing Tue, Nov 11 from San José to St. Louis, returning Thu, Nov 13, priced at $327 found 1 day ago
United
Tue, Nov 11 - Thu, Nov 13
SJO
San José
STL
St. Louis
$327 Roundtrip, found 1 day ago
$327
Roundtrip
found 1 day ago
Select United flight, departing Tue, Nov 11 from San José to St. Louis, returning Thu, Nov 13, priced at $327 found 1 day ago
American Airlines
Fri, Dec 12 - Sun, Jan 11
SJO
San José
STL
St. Louis
$347 Roundtrip, found 2 days ago
$347
Roundtrip
found 2 days ago
Select American Airlines flight, departing Fri, Dec 12 from San José to St. Louis, returning Sun, Jan 11, priced at $347 found 2 days ago
American Airlines
Fri, Jan 16 - Sun, Jan 25
SJO
San José
STL
St. Louis
$349 Roundtrip, found 1 day ago
$349
Roundtrip
found 1 day ago
Select American Airlines flight, departing Fri, Jan 16 from San José to St. Louis, returning Sun, Jan 25, priced at $349 found 1 day ago
Southwest Airlines
Tue, Nov 11 - Thu, Nov 13
SJO
San José
STL
St. Louis
$351 Roundtrip, found 1 day ago
$351
Roundtrip
found 1 day ago
Select Southwest Airlines flight, departing Tue, Nov 11 from San José to St. Louis, returning Thu, Nov 13, priced at $351 found 1 day ago
Spirit Airlines
Thu, Feb 5 - Fri, Feb 13
SJO
San José
STL
St. Louis
$352 Roundtrip, found 1 day ago
$352
Roundtrip
found 1 day ago
Select Spirit Airlines flight, departing Thu, Feb 5 from San José to St. Louis, returning Fri, Feb 13, priced at $352 found 1 day ago
United
Wed, Dec 3 - Mon, Dec 8
SJO
San José
STL
St. Louis
$357 Roundtrip, just found
$357
Roundtrip
just found
Select United flight, departing Wed, Dec 3 from San José to St. Louis, returning Mon, Dec 8, priced at $357 just found
Delta
Wed, Dec 3 - Mon, Dec 8
SJO
San José
STL
St. Louis
$357 Roundtrip, just found
$357
Roundtrip
just found
Select Delta flight, departing Wed, Dec 3 from San José to St. Louis, returning Mon, Dec 8, priced at $357 just found

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

September is typically the cheapest month to fly

From $276 - $1,670 per traveler.

Alternative airports near St. Louis

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

Select flight to Lambert-St. Louis Intl. STL. Cheapest option available. Average driving time to city center is 20 minutes. Flights from $386
STL
Lambert-St. Louis Intl.
Cheapest
Average driving time to city center20 min
Flights from $386
Flights from San José (SJO) to St. Louis (STL)
Origin airport
Juan Santamaría Intl.
Destination airport
Lambert-St. Louis Intl.
Airlines serving
Air Canada, Alaska Airlines, American Airlines, Copa, Delta, Southwest Airlines, United
Roundtrip price
$318
Distance
2022 mi

San José to St. Louis Flights

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

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 San José to St. Louis are during the month of November. You can find some of the cheapest flights from San José to St. Louis with Expedia's search tool and vast selection of airlines.

 

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

Sunday is one of the best days to book for cheap flights from San José to St. Louis: 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 San José to St. Louis

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 San José to St. Louis in 2025. You can also book with separate airlines for your outbound and return journeys, from $163 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 San José to St. Louis 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 San José to St. Louis 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 Juan Santamaria Intl. Airport (SJO) to Lambert-St. Louis Intl. Airport (STL) cost?
Snag a cheap one-way flight from $163 or cheap return flight from $319 from Juan Santamaria Intl. Airport (SJO) to Lambert-St. Louis Intl. Airport (STL) with Expedia. Enter your travel dates and sort by "Price (lowest to highest)" to find our cheapest flight offers on this route.
What is the cheapest month to fly from Juan Santamaria Intl. Airport (SJO) to Lambert-St. Louis Intl. Airport (STL)?
The cheapest month to fly from SJO to STL is November, when there's less demand. Off-peak season is generally when airlines offer lower prices between these airports.
What is the cheapest airline that flies from Juan Santamaria Intl. Airport (SJO) to Lambert-St. Louis Intl. Airport (STL)?
Use the filters on Expedia to compare different airlines and find the most affordable carrier that'll fly you from SJO to STL. Then, sort your results by "Price (lowest to highest)" to pick up a good deal.
How many flights per day from Juan Santamaria Intl. Airport (SJO) to Lambert-St. Louis Intl. Airport (STL)?
Nonstop flights from Juan Santamaria Intl. Airport (SJO) to Lambert-St. Louis Intl. Airport (STL) aren't available daily, so you'll need to take a flight with a layover. Explore your options with our filter tool. Enter your travel dates and click on either "1 Stop" or "2+ Stops."
What day of the week has the most flights from SJO to STL?
Usually you'll find the greatest selection of flight options on a Friday. Tuesdays are often the quietest.* But this can change based on the season, airline 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 Juan Santamaria Intl. Airport (SJO) to Lambert-St. Louis Intl. Airport (STL)?
To avoid potential delays on the Juan Santamaria Intl. Airport (SJO) to Lambert-St. Louis Intl. Airport (STL) route, travel before 3 PM. Departures after this time are 22% more likely to be canceled.**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 Juan Santamaria Intl. Airport (SJO) to Lambert-St. Louis Intl. Airport (STL) last-minute?
Last-minute bookings from SJO to STL are generally more expensive. For the best rates, start searching for flights as soon as possible. That said, if you can play around with your travel dates, you may land a cheap ticket right before your journey.
Is it cheaper to book a SJO to STL flight and hotel package?
You can save money by securing a SJO to STL flight and hotel package compared to booking separately. In fact, travelers could save hundreds of dollars by bundling with Expedia. And it's simple to manage it all in one place. Once you've selected your preferred accommodations and flights, you can add extras such as tours, activities and car rentals.
Can I cancel or change the date of my flight from Juan Santamaria Intl. Airport (SJO) to Lambert-St. Louis Intl. Airport (STL)?
Usually, it's possible to reschedule or cancel your SJO to STL flight. However, for bookings made more than 24 hours ago, additional charges 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 information on our Customer Service portal.

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*Available to One Key members.