$354 Cheap Flights from Seattle (SEA) to Luxembourg (LUX)

View $354 flight on Sun, Dec 28, 2025Opens in a new window

Popular airlines from Seattle-Tacoma International Airport (SEA) to Findel International Airport (LUX)

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Cheap Flights from Seattle to Luxembourg (SEA-LUX)

Prices were available within the past 7 days and start at $354 for one-way flights and $451 for round trip, for the period specified. Prices and availability are subject to change. Additional terms apply.

British Airways
Tue, Dec 9 - Tue, Dec 16
SEA
Seattle
LUX
Luxembourg
$451 Roundtrip, found 3 days ago
$451
Roundtrip
found 3 days ago
Select British Airways flight, departing Tue, Dec 9 from Seattle to Luxembourg, returning Tue, Dec 16, priced at $451 found 3 days ago
British Airways
Wed, Oct 29 - Tue, Nov 4
SEA
Seattle
LUX
Luxembourg
$455 Roundtrip, found 2 days ago
$455
Roundtrip
found 2 days ago
Select British Airways flight, departing Wed, Oct 29 from Seattle to Luxembourg, returning Tue, Nov 4, priced at $455 found 2 days ago
American Airlines
Tue, Dec 30 - Tue, Jan 20
SEA
Seattle
LUX
Luxembourg
$463 Roundtrip, found 4 days ago
$463
Roundtrip
found 4 days ago
Select American Airlines flight, departing Tue, Dec 30 from Seattle to Luxembourg, returning Tue, Jan 20, priced at $463 found 4 days ago
American Airlines
Tue, Dec 30 - Tue, Jan 20
SEA
Seattle
LUX
Luxembourg
$468 Roundtrip, found 4 days ago
$468
Roundtrip
found 4 days ago
Select American Airlines flight, departing Tue, Dec 30 from Seattle to Luxembourg, returning Tue, Jan 20, priced at $468 found 4 days ago
American Airlines
Tue, Oct 21 - Tue, Oct 28
SEA
Seattle
LUX
Luxembourg
$468 Roundtrip, found 23 hours ago
$468
Roundtrip
found 23 hours ago
Select American Airlines flight, departing Tue, Oct 21 from Seattle to Luxembourg, returning Tue, Oct 28, priced at $468 found 23 hours ago
American Airlines
Tue, Oct 21 - Tue, Oct 28
SEA
Seattle
LUX
Luxembourg
$473 Roundtrip, found 23 hours ago
$473
Roundtrip
found 23 hours ago
Select American Airlines flight, departing Tue, Oct 21 from Seattle to Luxembourg, returning Tue, Oct 28, priced at $473 found 23 hours ago
British Airways
Tue, Dec 30 - Tue, Jan 20
SEA
Seattle
LUX
Luxembourg
$476 Roundtrip, found 4 days ago
$476
Roundtrip
found 4 days ago
Select British Airways flight, departing Tue, Dec 30 from Seattle to Luxembourg, returning Tue, Jan 20, priced at $476 found 4 days ago
Delta
Mon, Oct 20 - Sat, Oct 25
SEA
Seattle
LUX
Luxembourg
$489 Roundtrip, found 23 hours ago
$489
Roundtrip
found 23 hours ago
Select Delta flight, departing Mon, Oct 20 from Seattle to Luxembourg, returning Sat, Oct 25, priced at $489 found 23 hours ago
Lufthansa
Wed, Oct 29 - Tue, Nov 4
SEA
Seattle
LUX
Luxembourg
$493 Roundtrip, found 2 days ago
$493
Roundtrip
found 2 days ago
Select Lufthansa flight, departing Wed, Oct 29 from Seattle to Luxembourg, returning Tue, Nov 4, priced at $493 found 2 days ago
Air Canada
Mon, Apr 27 - Tue, May 12
SEA
Seattle
LUX
Luxembourg
$494 Roundtrip, found 4 days ago
$494
Roundtrip
found 4 days ago
Select Air Canada flight, departing Mon, Apr 27 from Seattle to Luxembourg, returning Tue, May 12, priced at $494 found 4 days ago
Flights from Seattle (SEA) to Luxembourg (LUX)
Origin airport
Seattle - Tacoma Intl.
Destination airport
Findel
Airlines serving
Air Canada, Air France, American Airlines, Austrian Airlines, British Airways, Delta, KLM, Lufthansa, Scandinavian Airlines, Swiss International Air Lines, TAP Portugal, Turkish Airlines, United
Roundtrip price
$450
Distance
5059 mi

Seattle to Luxembourg Flights

The cheapest times to fly from Seattle to Luxembourg

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

 

The best time to book a flight from Seattle to Luxembourg

Sunday is one of the best days to book for cheap flights from Seattle to Luxembourg: 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 Seattle to Luxembourg

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 Seattle to Luxembourg in 2025. You can also book with separate airlines for your outbound and return journeys, from $354 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 Seattle to Luxembourg 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 Seattle to Luxembourg 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 Seattle - Tacoma Intl. Airport (SEA) to Findel Airport (LUX) cost?
Discover the latest flight deals from SEA to LUX 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 SEA to LUX?
The cheapest flights from SEA to LUX 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 SEA to LUX?
Use the filter tool on Expedia to compare airlines and find the cheapest carrier that'll take you from SEA to LUX. Sort your results by "Price (lowest to highest)" to snap up a great deal.
How many flights per day from Seattle - Tacoma Intl. Airport (SEA) to Findel Airport (LUX)?
Nonstop flights from Seattle - Tacoma Intl. Airport (SEA) to Findel Airport (LUX) aren't available daily, so you'll have to take a flight with a layover. Explore your options with our filter tool. Enter your dates and select either "1 Stop" or "2+ Stops."
What day of the week has the most flights from SEA to LUX?
Friday is usually the busiest day for flights, while Tuesday tends to be the quietest.* Just remember that flight schedules can vary depending 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 Seattle - Tacoma Intl. Airport (SEA) to Findel Airport (LUX)?
To land at Findel Airport (LUX) on schedule, choose a flight that leaves Seattle - Tacoma Intl. Airport (SEA) before 3 PM. The chance 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 Seattle - Tacoma Intl. Airport (SEA) to Findel Airport (LUX) last-minute?
Booking your ticket from SEA to LUX shortly before your getaway is usually 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 SEA to LUX flight and hotel package?
Securing a SEA to LUX flight and hotel package is generally cheaper than booking separately. With Expedia, you can enjoy the convenience of organizing your trip in one place. Select from our wide range of stays and then add car rentals, activities and flights to your booking. Bundle it all together, and you could save hundreds of dollars.
Can I cancel or change the date of my flight from Seattle - Tacoma Intl. Airport (SEA) to Findel Airport (LUX)?
It's usually possible to reschedule or cancel your SEA to LUX 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 if any costs are involved. You'll also find more details on our Customer Service portal.

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*Available to One Key members.