$483 Cheap Flights from St. Louis (STL) to Basel (BSL)

View $483 flight on Mon, Aug 18, 2025Opens in a new window

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Find available prices by choosing your travel dates.

Cheap Flights from St. Louis to Basel (STL-BSL)

Prices were available within the past 7 days and start at $483 for one-way flights and $694 for round trip, for the period specified. Prices and availability are subject to change. Additional terms apply.

British Airways
Sun, Nov 30 - Fri, Dec 12
STL
St. Louis
BSL
Basel
$694 Roundtrip, found 6 days ago
$694
Roundtrip
found 6 days ago
Select British Airways flight, departing Sun, Nov 30 from St. Louis to Basel, returning Fri, Dec 12, priced at $694 found 6 days ago
British Airways
Wed, Oct 22 - Thu, Oct 30
STL
St. Louis
BSL
Basel
$731 Roundtrip, found 15 hours ago
$731
Roundtrip
found 15 hours ago
Select British Airways flight, departing Wed, Oct 22 from St. Louis to Basel, returning Thu, Oct 30, priced at $731 found 15 hours ago
Lufthansa
Wed, Oct 22 - Fri, Oct 31
STL
St. Louis
BSL
Basel
$734 Roundtrip, found 15 hours ago
$734
Roundtrip
found 15 hours ago
Select Lufthansa flight, departing Wed, Oct 22 from St. Louis to Basel, returning Fri, Oct 31, priced at $734 found 15 hours ago
Air Canada
Wed, Oct 22 - Fri, Oct 31
STL
St. Louis
BSL
Basel
$737 Roundtrip, found 15 hours ago
$737
Roundtrip
found 15 hours ago
Select Air Canada flight, departing Wed, Oct 22 from St. Louis to Basel, returning Fri, Oct 31, priced at $737 found 15 hours ago
Lufthansa
Wed, Oct 22 - Fri, Oct 31
STL
St. Louis
BSL
Basel
$737 Roundtrip, found 15 hours ago
$737
Roundtrip
found 15 hours ago
Select Lufthansa flight, departing Wed, Oct 22 from St. Louis to Basel, returning Fri, Oct 31, priced at $737 found 15 hours ago
Air Canada
Wed, Oct 22 - Fri, Oct 31
STL
St. Louis
BSL
Basel
$740 Roundtrip, found 15 hours ago
$740
Roundtrip
found 15 hours ago
Select Air Canada flight, departing Wed, Oct 22 from St. Louis to Basel, returning Fri, Oct 31, priced at $740 found 15 hours ago
British Airways
Sun, Nov 30 - Fri, Dec 12
STL
St. Louis
BSL
Basel
$744 Roundtrip, found 6 days ago
$744
Roundtrip
found 6 days ago
Select British Airways flight, departing Sun, Nov 30 from St. Louis to Basel, returning Fri, Dec 12, priced at $744 found 6 days ago
British Airways
Sun, Nov 30 - Fri, Dec 12
STL
St. Louis
BSL
Basel
$749 Roundtrip, found 6 days ago
$749
Roundtrip
found 6 days ago
Select British Airways flight, departing Sun, Nov 30 from St. Louis to Basel, returning Fri, Dec 12, priced at $749 found 6 days ago
Delta
Sat, Jun 7 - Sat, Jun 14
STL
St. Louis
BSL
Basel
$1,300 Roundtrip, found 5 days ago
$1,300
Roundtrip
found 5 days ago
Select Delta flight, departing Sat, Jun 7 from St. Louis to Basel, returning Sat, Jun 14, priced at $1,300 found 5 days ago
KLM
Sat, Jun 7 - Sat, Jun 14
STL
St. Louis
BSL
Basel
$1,352 Roundtrip, found 5 days ago
$1,352
Roundtrip
found 5 days ago
Select KLM flight, departing Sat, Jun 7 from St. Louis to Basel, returning Sat, Jun 14, priced at $1,352 found 5 days ago
Flights from St. Louis (STL) to Basel (BSL)
Origin airport
Lambert-St. Louis Intl.
Destination airport
EuroAirport
Airlines serving
Air Canada, British Airways, Lufthansa
Roundtrip price
$693
Distance
4632 mi

St. Louis to Basel Flights

The cheapest times to fly from St. Louis to Basel

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

The best time to book a flight from St. Louis to Basel

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

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 Basel in 2025. You can also book with separate airlines for your outbound and return journeys, from $483 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 Basel 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 Basel 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 EuroAirport Airport (BSL) cost?
Discover the latest flight deals from STL to BSL by entering your preferred travel dates and searching on Expedia. Easily compare prices by departure date if you have flexibility with your schedule and use handy filters to explore prices for your preferred journey. As a member of One Key™, our free loyalty program, you can use Price Tracking to watch fares and receive notifications if prices go up or down.
What is the cheapest month to fly from STL to BSL?
The cheapest flights from STL to BSL are usually during off-peak season, when demand is lower. To save money, avoid flying during public holidays, school breaks and major local events.
What is the cheapest airline that flies from STL to BSL?
Use the filter tool on Expedia to compare airlines and find the cheapest carrier that’ll take you from STL to BSL. Sort your results by “Price (lowest to highest)” to snap up a great deal.
How many flights per day from Lambert-St. Louis Intl. Airport (STL) to EuroAirport Airport (BSL)?
Direct flights from Lambert-St. Louis Intl. Airport (STL) to EuroAirport Airport (BSL) aren’t available daily, so you’ll have 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 STL to BSL?
Friday is typically the busiest day for flights, while Tuesday tends to be the quietest.* Remember that flight schedules can change based on various factors, such as the airline and season.*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 EuroAirport Airport (BSL)?
To land at EuroAirport Airport (BSL) without delays, book a flight that takes off 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 EuroAirport Airport (BSL) last-minute?
Booking your ticket from STL to BSL just before your journey is usually more expensive. But if there’s some wiggle room with your itinerary, you could score a cheap last-minute fare.
Is it cheaper to book a STL to BSL flight and hotel package?
Compared with arranging hotels and flights separately, booking a STL to BSL flight and hotel package with Expedia could lead to significant savings. What’s more, having everything in one place will take the stress out of planning your trip. Simply secure your flights and select from our wide range of stays, then customize your trip with other add-ons like activities, tours and car rentals.
Can I cancel or change the date of my flight from Lambert-St. Louis Intl. Airport (STL) to EuroAirport Airport (BSL)?
In most instances, you can cancel or reschedule your STL to BSL flight. However, additional fees may apply, especially if you made your booking over 24 hours ago. Double-check your itinerary for the airline’s fees and rules on flight changes, or if you need more information, head to our Customer Service portal.

Explore a world of travel with Expedia

*Available to One Key members.