$412 Cheap Flights from Luxembourg (LUX) to St. Louis (STL)

View $412 flight on Wed, May 6, 2026Opens in a new window

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

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

Prices were available within the past 7 days and start at $412 for one-way flights and $880 for round trip, for the period specified. Prices and availability are subject to change. Additional terms apply.

Lufthansa
Mon, Dec 15 - Mon, Dec 22
LUX
Luxembourg
STL
St. Louis
$880 Roundtrip, found 6 days ago
$880
Roundtrip
found 6 days ago
Select Lufthansa flight, departing Mon, Dec 15 from Luxembourg to St. Louis, returning Mon, Dec 22, priced at $880 found 6 days ago
Lufthansa
Mon, Dec 15 - Mon, Dec 22
LUX
Luxembourg
STL
St. Louis
$887 Roundtrip, found 6 days ago
$887
Roundtrip
found 6 days ago
Select Lufthansa flight, departing Mon, Dec 15 from Luxembourg to St. Louis, returning Mon, Dec 22, priced at $887 found 6 days ago
Lufthansa
Mon, Dec 15 - Mon, Dec 22
LUX
Luxembourg
STL
St. Louis
$913 Roundtrip, found 6 days ago
$913
Roundtrip
found 6 days ago
Select Lufthansa flight, departing Mon, Dec 15 from Luxembourg to St. Louis, returning Mon, Dec 22, priced at $913 found 6 days ago
Austrian Airlines
Mon, Dec 15 - Mon, Dec 22
LUX
Luxembourg
STL
St. Louis
$923 Roundtrip, found 6 days ago
$923
Roundtrip
found 6 days ago
Select Austrian Airlines flight, departing Mon, Dec 15 from Luxembourg to St. Louis, returning Mon, Dec 22, priced at $923 found 6 days ago
Lufthansa
Mon, Dec 15 - Mon, Dec 22
LUX
Luxembourg
STL
St. Louis
$933 Roundtrip, found 6 days ago
$933
Roundtrip
found 6 days ago
Select Lufthansa flight, departing Mon, Dec 15 from Luxembourg to St. Louis, returning Mon, Dec 22, priced at $933 found 6 days ago
Lufthansa
Mon, Dec 15 - Mon, Dec 22
LUX
Luxembourg
STL
St. Louis
$936 Roundtrip, found 6 days ago
$936
Roundtrip
found 6 days ago
Select Lufthansa flight, departing Mon, Dec 15 from Luxembourg to St. Louis, returning Mon, Dec 22, priced at $936 found 6 days ago
Austrian Airlines
Mon, Dec 15 - Mon, Dec 22
LUX
Luxembourg
STL
St. Louis
$970 Roundtrip, found 6 days ago
$970
Roundtrip
found 6 days ago
Select Austrian Airlines flight, departing Mon, Dec 15 from Luxembourg to St. Louis, returning Mon, Dec 22, priced at $970 found 6 days ago
Lufthansa
Mon, Dec 15 - Mon, Dec 22
LUX
Luxembourg
STL
St. Louis
$972 Roundtrip, found 6 days ago
$972
Roundtrip
found 6 days ago
Select Lufthansa flight, departing Mon, Dec 15 from Luxembourg to St. Louis, returning Mon, Dec 22, priced at $972 found 6 days ago
Air Canada
Mon, Dec 15 - Mon, Dec 22
LUX
Luxembourg
STL
St. Louis
$1,067 Roundtrip, found 6 days ago
$1,067
Roundtrip
found 6 days ago
Select Air Canada flight, departing Mon, Dec 15 from Luxembourg to St. Louis, returning Mon, Dec 22, priced at $1,067 found 6 days ago
British Airways
Mon, Dec 15 - Mon, Dec 22
LUX
Luxembourg
STL
St. Louis
$1,161 Roundtrip, found 6 days ago
$1,161
Roundtrip
found 6 days ago
Select British Airways flight, departing Mon, Dec 15 from Luxembourg to St. Louis, returning Mon, Dec 22, priced at $1,161 found 6 days ago

Frequently asked questions

How much does a flight from Findel Airport (LUX) to Lambert-St. Louis Intl. Airport (STL) cost?
Get a cheap one-way flight from $412 or cheap return flight from $880 from Findel Airport (LUX) 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 deals on this route.
What is the cheapest month to fly from Findel Airport (LUX) to Lambert-St. Louis Intl. Airport (STL)?
Flying in December is a great way to save, as it's the cheapest month for flights between LUX and STL. You'll typically find the lowest prices during off-peak months.
What is the cheapest airline that flies from Findel Airport (LUX) to Lambert-St. Louis Intl. Airport (STL)?
To find the cheapest airline that'll fly you from LUX to STL, use Expedia's filter tool. Tailor your search based on what's important to you, such as preferred carriers and ideal departure window. You can then sort your results by "Price (lowest to highest)" to list the most affordable options first.
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.

Travel information

Origin airport
Findel
Destination airport
Lambert-St. Louis Intl.
Roundtrip price
$880
Distance
4506 mi

Book with confidence

Luxembourg to St. Louis Flights

The cheapest times to fly from Luxembourg 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 Luxembourg to St. Louis are during the month of December. You can find some of the cheapest flights from Luxembourg to St. Louis with Expedia's search tool and vast selection of airlines.

 

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

Sunday is one of the best days to book for cheap flights from Luxembourg 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 Luxembourg 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 Luxembourg to St. Louis in 2025. You can also book with separate airlines for your outbound and return journeys, from $412 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 Luxembourg 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 Luxembourg 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.

 

Luxembourg to St. Louis Flights

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*Available to One Key members.