$425 Cheap Flights from Luxembourg (LUX) to St. Louis (STL)

View $425 flight on Wed, Aug 20, 2025Opens in a new window

Popular airlines from Findel International Airport (LUX) to St. Louis Lambert Intl. Airport (STL)

  • Plan, book, fly with confidence

  • trending down icon

    Be in the know

    Get alerts if flight prices drop or rise*
  • bex rewards loyalty icon

    Book smarter

    Save up to 30% on select hotels after you book a flight*
  • one key icon

    Earn twice

    Earn your airline miles on top of our OneKeyCash
    Learn about One Key

Cheap Flights from Luxembourg to St. Louis (LUX-STL)

Prices were available within the past 7 days and start at $425 for one-way flights and $574 for round trip, for the period specified. Prices and availability are subject to change. Additional terms apply.

British Airways
Wed, Dec 17 - Sun, Dec 21
LUX
Luxembourg
STL
St. Louis
$574 Roundtrip, found 5 days ago
$574
Roundtrip
found 5 days ago
Select British Airways flight, departing Wed, Dec 17 from Luxembourg to St. Louis, returning Sun, Dec 21, priced at $574 found 5 days ago
British Airways
Wed, Dec 17 - Sun, Dec 21
LUX
Luxembourg
STL
St. Louis
$597 Roundtrip, found 5 days ago
$597
Roundtrip
found 5 days ago
Select British Airways flight, departing Wed, Dec 17 from Luxembourg to St. Louis, returning Sun, Dec 21, priced at $597 found 5 days ago
British Airways
Wed, Dec 17 - Sun, Dec 21
LUX
Luxembourg
STL
St. Louis
$627 Roundtrip, found 5 days ago
$627
Roundtrip
found 5 days ago
Select British Airways flight, departing Wed, Dec 17 from Luxembourg to St. Louis, returning Sun, Dec 21, priced at $627 found 5 days ago
British Airways
Wed, Dec 17 - Sun, Dec 21
LUX
Luxembourg
STL
St. Louis
$680 Roundtrip, found 5 days ago
$680
Roundtrip
found 5 days ago
Select British Airways flight, departing Wed, Dec 17 from Luxembourg to St. Louis, returning Sun, Dec 21, priced at $680 found 5 days ago
British Airways
Wed, Aug 20 - Wed, Aug 27
LUX
Luxembourg
STL
St. Louis
$685 Roundtrip, found 2 days ago
$685
Roundtrip
found 2 days ago
Select British Airways flight, departing Wed, Aug 20 from Luxembourg to St. Louis, returning Wed, Aug 27, priced at $685 found 2 days ago
British Airways
Wed, Jul 30 - Wed, Sep 10
LUX
Luxembourg
STL
St. Louis
$685 Roundtrip, found 2 days ago
$685
Roundtrip
found 2 days ago
Select British Airways flight, departing Wed, Jul 30 from Luxembourg to St. Louis, returning Wed, Sep 10, priced at $685 found 2 days ago
Air Dolomiti
Thu, Aug 28 - Sun, Aug 31
LUX
Luxembourg
STL
St. Louis
$722 Roundtrip, found 3 days ago
$722
Roundtrip
found 3 days ago
Select Air Dolomiti flight, departing Thu, Aug 28 from Luxembourg to St. Louis, returning Sun, Aug 31, priced at $722 found 3 days ago
Air Canada
Thu, Aug 28 - Sun, Aug 31
LUX
Luxembourg
STL
St. Louis
$758 Roundtrip, found 3 days ago
$758
Roundtrip
found 3 days ago
Select Air Canada flight, departing Thu, Aug 28 from Luxembourg to St. Louis, returning Sun, Aug 31, priced at $758 found 3 days ago
Lufthansa
Wed, Aug 20 - Wed, Aug 27
LUX
Luxembourg
STL
St. Louis
$789 Roundtrip, found 2 days ago
$789
Roundtrip
found 2 days ago
Select Lufthansa flight, departing Wed, Aug 20 from Luxembourg to St. Louis, returning Wed, Aug 27, priced at $789 found 2 days ago
Austrian Airlines
Fri, Aug 1 - Tue, Aug 5
LUX
Luxembourg
STL
St. Louis
$1,341 Roundtrip, found 1 day ago
$1,341
Roundtrip
found 1 day ago
Select Austrian Airlines flight, departing Fri, Aug 1 from Luxembourg to St. Louis, returning Tue, Aug 5, priced at $1,341 found 1 day ago

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 $1,094
STL
Lambert-St. Louis Intl.
Cheapest
Average driving time to city center20 min
Flights from $1,094
Flights from Luxembourg (LUX) to St. Louis (STL)
Origin airport
Findel
Destination airport
Lambert-St. Louis Intl.
Airlines serving
Air Canada, Austrian Airlines, British Airways, Lufthansa
Roundtrip price
$573
Distance
4506 mi

Frequently asked questions

How much does a flight from Findel Airport (LUX) to Lambert-St. Louis Intl. Airport (STL) cost?
Discover the latest flight deals from LUX to STL 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 LUX to STL?
The cheapest flights from LUX to STL 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 LUX to STL?
Use the filter tool on Expedia to compare airlines and find the cheapest carrier that'll take you from LUX to STL. Sort your results by "Price (lowest to highest)" to snap up a great deal.
How many flights per day from Findel Airport (LUX) to Lambert-St. Louis Intl. Airport (STL)?
You'll need to take a flight with a layover when traveling from Findel Airport (LUX) to Lambert-St. Louis Intl. Airport (STL). There are no daily direct flights on this route. However, just filter your search to include one or two stops to discover the best option for your trip.
What day of the week has the most flights from LUX to STL?
Friday is typically the busiest day for flights, while Tuesday tends to be the quietest.* Remember that flight schedules can change depending on a range of factors, such as the time of year and carrier.*Busiest/quietest day to travel is based on Expedia flight demand through January to December 2024.
What is the best time to fly from Findel Airport (LUX) to Lambert-St. Louis Intl. Airport (STL)?
To arrive at Lambert-St. Louis Intl. Airport (STL) without delays, pick a flight that leaves from Findel Airport (LUX) before 3 PM. The likelihood of cancellations is 22% higher, on average, for departures after this hour.**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 Findel Airport (LUX) to Lambert-St. Louis Intl. Airport (STL) last-minute?
Booking your flight from LUX to STL just before your getaway is generally more expensive. But if there's some wiggle room with your departure times and dates, you could land a cheap last-minute fare.
Is it cheaper to book a LUX to STL flight and hotel package?
You'll generally save money by booking a LUX to STL flight and hotel package compared to booking separately. In fact, you could save hundreds of dollars by bundling with Expedia. And it's easy to manage everything in one place. Once you've selected your preferred accommodations and flights, consider other add-ons like activities, tours and car rentals.
Can I cancel or change the date of my flight from Findel Airport (LUX) to Lambert-St. Louis Intl. Airport (STL)?
Typically, you're able to cancel or reschedule your LUX to STL flight. However, additional fees may apply, especially if your booking was made more than 24 hours ago. Double-check your itinerary for the airline's rules and fees on flight changes, or if you want further details, visit our Customer Service portal.

Explore a world of travel with Expedia

*Available to One Key members.