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Luxembourg

$431+ Cheap flights from Seattle (SEA) to Luxembourg (LUX)

This is the cheapest one-way flight price found by a Cheapflights user in the last 72 hours by searching for a flight departing on 7/1. Fares are subject to change and may not be available on all flights or dates of travel.
SEA — LUX
Apr 22 — Apr 291
Wed 4/22
Wed 4/29
1 adult, Economy
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Cheap flight deals from Seattle to Luxembourg

Cheapest flights from Seattle to Luxembourg
Explore the most affordable flight options available from Seattle to Luxembourg. Find the lowest fares from popular airlines and budget airlines, with prices last updated on March 23, 2026.

This Scandinavian Airlines deal was found by Cheapflights users on 3/19. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Scandinavian Airlines is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Sun 9/203:55 pm
SEA
-
LUX
1 stop32h 55m
Scandinavian Airlines
Thu 9/247:55 pm
LUX
-
SEA
1 stop26h 50m
Scandinavian Airlines
Deal found 3/19$639
This FlightHub deal was found by Cheapflights users on 3/20. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure FlightHub is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Tue 8/46:50 pm
SEA
-
LUX
1 stop12h 20m
Lufthansa
Wed 8/196:25 am
LUX
-
SEA
1 stop14h 30m
Lufthansa
Deal found 3/20$641
This United Airlines deal was found by Cheapflights users on 3/21. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure United Airlines is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Tue 8/46:50 pm
SEA
-
LUX
1 stop12h 20m
United Airlines
Wed 8/198:20 am
LUX
-
SEA
1 stop12h 35m
United Airlines
Deal found 3/21$643
This Delta deal was found by Cheapflights users on 3/23. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Delta is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Tue 8/45:45 pm
SEA
-
LUX
1 stop14h 50m
Delta
Wed 8/1910:30 am
LUX
-
SEA
1 stop14h 57m
Delta
Deal found 3/23$645
This Gotogate deal was found by Cheapflights users on 3/20. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Gotogate is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Mon 5/42:10 pm
SEA
-
LUX
1 stop14h 40m
Multiple Airlines
Mon 5/116:05 am
LUX
-
SEA
2 stops25h 35m
Multiple Airlines
Deal found 3/20$648
This Justfly.com deal was found by Cheapflights users on 3/23. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Justfly.com is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Tue 8/182:10 pm
SEA
-
LUX
1 stop14h 50m
Lufthansa
Wed 8/268:20 am
LUX
-
SEA
1 stop12h 35m
Lufthansa
Deal found 3/23$653
This FlightHub deal was found by Cheapflights users on 3/20. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure FlightHub is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Tue 8/187:00 am
SEA
-
LUX
2 stops18h 00m
Multiple Airlines
Wed 8/2610:15 am
LUX
-
SEA
2 stops17h 17m
Multiple Airlines
Deal found 3/20$655
This United Airlines deal was found by Cheapflights users on 3/20. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure United Airlines is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Tue 8/188:50 am
SEA
-
LUX
2 stops22h 20m
United Airlines
Wed 8/268:20 am
LUX
-
SEA
3 stops24h 04m
United Airlines
Deal found 3/20$657
This Expedia deal was found by Cheapflights users on 3/20. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Expedia is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Mon 5/42:10 pm
SEA
-
LUX
1 stop14h 40m
Lufthansa
Mon 5/116:05 am
LUX
-
SEA
1 stop15h 15m
Lufthansa
Deal found 3/20$661

Find flight deals from Seattle to Luxembourg

Discover tips and strategies to find the most affordable flight options for your journey from Seattle (SEA) to Luxembourg (LUX). Learn about various techniques such as flexible date searches, comparing prices across and setting up price alerts. Use these methods to find the cheapest flights available for your travel needs. Data last updated March 23, 2026.

Most accurate provider

FlightHub
3 stars

Most trusted provider

FlightHub
3 stars

Round-trip from

$641
(FlightHub)

One-way from

$431
(American Airlines)

Popular in

June

Cheapest in

August

Average price

$681
Provider with most accurate pricing for Seattle/Tacoma Intl-Luxembourg flight deals.
Search Deals
Provider most trusted by Cheapflights users for Seattle/Tacoma Intl-Luxembourg flights.
Search Deals
From Seattle/Tacoma Intl to Luxembourg
Search Deals
One-way flight from Seattle/Tacoma Intl to Luxembourg
Search Deals
Highest demand for flights based on searches. 24% potential increase in price ($205 potential increase over avg. RT price).
Search Deals
Cheapest flight prices on average. 5% potential price decrease ($36 potential savings vs. average RT price).
Search Deals
Average for round-trip flights in March 2026
Search Deals

Cheapflights Fare Finder

 
Customize your flight search to find flights from Seattle to Luxembourg that fit within your specific budget. Explore options based on user searches and filter the results based on your desired price range. Find flights that match your budget for a cost-effective journey. Over the last 7 days, Cheapflights users made 2,558,603 searches. Data last updated March 23, 2026.
Use the filters below to find and compare flights from Seattle to Luxembourg that are best for you.

Fly from

Fly to

Route

Depart

Return

Price

Cheapest round-trip
Quickest round-trip

SeattleLuxembourg

SEA - LUX

SEALUX

Seattle/Tacoma Intl

Tue 8/4

6:50 pm-4:10 pm

1 stop12h 20m

Luxembourg

Wed 8/19

8:20 am-11:55 am

1 stop12h 35m

$643

SeattleLuxembourg

SEA - LUX

SEALUX

Seattle/Tacoma Intl

Tue 8/18

11:05 am-4:10 pm

2 stops20h 05m

Luxembourg

Wed 8/26

8:20 am-11:55 am

1 stop12h 35m

$647

SeattleLuxembourg

SEA - LUX

SEALUX

Seattle/Tacoma Intl

Mon 5/4

11:59 pm-7:30 pm

2 stops34h 31m

Luxembourg

Mon 5/11

8:25 am-11:29 pm

3 stops24h 04m

$663
Cheapest one-way
Quickest one-way

SeattleLuxembourg

SEA - LUX

SEALUX

Seattle/Tacoma Intl

Wed 7/1

2:10 pm-1:50 pm

1 stop14h 40m

$454

SeattleLuxembourg

SEA - LUX

SEALUX

Seattle/Tacoma Intl

Wed 7/1

7:05 am-7:45 am

3 stops63h 40m

$575

SeattleLuxembourg

SEA - LUX

SEALUX

Seattle/Tacoma Intl

Wed 6/3

10:30 am-1:50 pm

2 stops18h 20m

$1,113

Flights are sorted by cheapest round-trip flights first.

Deals found on 3/23

Sorted by cheapest first

Compare providers for flights from Seattle to Luxembourg

Provider information is updated monthly. Please note that these providers often have deals for this flight, but the availability may vary on a day-by-day basis on Cheapflights.
Use the table below to compare price accuracy, trust ratings, and cancellation policies for each provider offering flight deals from Seattle to Luxembourg in March.
ProviderPrice AccuracyTrust Score*
FlightHubPrice Accuracy3 starsTrust Score*3 stars
OvagoPrice Accuracy2 starsTrust Score*3 stars

*The Trust Score is based on feedback from users after their booking experience. It measures overall satisfaction, helping us identify issues like hidden fees, problems during the ticketing process, and the quality of customer service. This score is our best indicator of the provider's quality and reliability.

  • Most accurate provider: When it comes to deals on Seattle-Luxembourg flights, users find the pricing of FlightHub to be most consistent on Cheapflights vs. FlightHub Users can find the same prices on Seattle-Luxembourg flight deals on Cheapflights vs. FlightHub >95% of the time. Price accuracy is based on data collected from Seattle-Luxembourg flight searches over the past month and is updated monthly.
  • Most trusted provider: When it comes to deals on Seattle-Luxembourg flights, Cheapflights users trust FlightHub the most. FlightHub has received a user feedback score of 3 out of 3 stars (3 being the best), meaning they have been trusted the most by Cheapflights users looking for Seattle-Luxembourg flight deals. Provider user feedback score is based on Cheapflights searches over the past month and is updated monthly.

Best time to book a flight from Seattle to Luxembourg

Have a flexible travel schedule? Discover the best time to fly to Luxembourg from Seattle with our price prediction graph.
Estimated round-trip price
Rates are based on past data. Find the cheapest month and day to book your flight based on your travel requirements, then search for cheap deals.

Cheapflights Insights

Everything you need to know about your flight from Seattle to Luxembourg

What is the cheapest month to book a flight from Seattle to Luxembourg?

Currently, August is the cheapest month in which you can book a flight from Seattle to Luxembourg (average of $306). Flying from Seattle to Luxembourg in October is currently the most expensive (average of $835). There are several factors that can impact the price of a flight, so comparing airlines, departure airports and flight times can provide users with more options.

Reviews of airlines servicing Luxembourg

Get insights into the airlines that provide service to Luxembourg. Read reviews, discover amenities, and learn about the overall travel experience offered by airlines. Use this information to make informed decisions when choosing an airline for your flight to Luxembourg. Reviews last updated March 23, 2026.
Read through reviews of airlines operating flights from Seattle to Luxembourg, such as SWISS,Air France, andUnited Airlines. Reviews also offer insight into each airline's entertainment options, comfort, food, crew/service, and boarding process.
SWISS
7.5
Good
1,903 reviews

Boarding

7.7

Overall

7.5

Entertainment

6.8

Crew

8.3

Food

7.1

Comfort

7.4

Reviews

1 / 20
10.0
Excellent

Thomas,Mar 2026

BOS - ZRH

The business class seats on the new Swiss A350 are hard as a rock. Seems like a bit of a miss on the new "Swiss Senses" experience. Other than that, excellent service.
SWISS
7.5
Good
1,903 reviews
SWISS
7.5
Good
1,903 reviews

Boarding

7.7

Overall

7.5

Entertainment

6.8

Crew

8.3

Food

7.1

Comfort

7.4

Reviews

1 / 20
10.0
Excellent

Thomas,Mar 2026

BOS - ZRH

The business class seats on the new Swiss A350 are hard as a rock. Seems like a bit of a miss on the new "Swiss Senses" experience. Other than that, excellent service.
Air France
7.4
Good
1,550 reviews
SWISS
7.5
Good
1,903 reviews

Boarding

7.7

Overall

7.5

Entertainment

6.8

Crew

8.3

Food

7.1

Comfort

7.4

Reviews

1 / 20
10.0
Excellent

Thomas,Mar 2026

BOS - ZRH

The business class seats on the new Swiss A350 are hard as a rock. Seems like a bit of a miss on the new "Swiss Senses" experience. Other than that, excellent service.
United Airlines
7.4
Good
9,467 reviews
SWISS
7.5
Good
1,903 reviews

Boarding

7.7

Overall

7.5

Entertainment

6.8

Crew

8.3

Food

7.1

Comfort

7.4

Reviews

1 / 20
10.0
Excellent

Thomas,Mar 2026

BOS - ZRH

The business class seats on the new Swiss A350 are hard as a rock. Seems like a bit of a miss on the new "Swiss Senses" experience. Other than that, excellent service.
Lufthansa
6.8
Okay
7,864 reviews
SWISS
7.5
Good
1,903 reviews

Boarding

7.7

Overall

7.5

Entertainment

6.8

Crew

8.3

Food

7.1

Comfort

7.4

Reviews

1 / 20
10.0
Excellent

Thomas,Mar 2026

BOS - ZRH

The business class seats on the new Swiss A350 are hard as a rock. Seems like a bit of a miss on the new "Swiss Senses" experience. Other than that, excellent service.
British Airways
6.7
Okay
7,813 reviews
SWISS
7.5
Good
1,903 reviews

Boarding

7.7

Overall

7.5

Entertainment

6.8

Crew

8.3

Food

7.1

Comfort

7.4

Reviews

1 / 20
10.0
Excellent

Thomas,Mar 2026

BOS - ZRH

The business class seats on the new Swiss A350 are hard as a rock. Seems like a bit of a miss on the new "Swiss Senses" experience. Other than that, excellent service.

Related info for your journey

Find useful and relevant information for your journey from Seattle to Luxembourg. Access travel guides, tips, and recommendations to enhance your travel experience. Get information about local attractions, weather, transportation options, and more.

  • How long is the flight from Seattle to Luxembourg?

    For as low as $641, Lufthansa can have you in Luxembourg from Seattle in 12h 20m. Seattle and Luxembourg are separated by a distance of 5057 mi. Both multi-stop and nonstop flights can be found to your destination and back.

  • What are the cheapest airlines flying from Seattle to Luxembourg round-trip?

    SWISS, at $306, was found to be the cheapest airline from Seattle to Luxembourg.Alternate airlines to your destination round-trip include British Airways and Air France. SWISS is 52% cheaper than the average price of flights available within the next 90 days to this destination.

  • Can I find deals for flights from Seattle to Luxembourg that include hotel bookings?

    Yes. In addition to deals on Seattle to Luxembourg flights, Cheapflights offers vacation packages that include both flights and hotel.

  • How can I find direct flights from Seattle to Luxembourg?

    After entering your origin and destination, apply the non-stop filter on the search result page to find direct flights from Seattle to Luxembourg.

  • Can I find deals for business class flights from Seattle to Luxembourg?

    Yes. Cheapflights offers flight deals from Seattle to Luxembourg by cabin class. In addition to browsing deals, you can also filter by cabin class on the search results page after making a search.

  • What is the cheapest month to book a flight from Seattle to Luxembourg?

    Currently, August is the cheapest month in which you can book a flight from Seattle to Luxembourg (average of $306). Flying from Seattle to Luxembourg in October is currently the most expensive (average of $835). There are several factors that can impact the price of a flight, so comparing airlines, departure airports and flight times can provide users with more options.

See more FAQs

Traveling to a place near Luxembourg?

Book flights to Luxembourg if you plan to visit one of these locations
Esch-sur-Alzette

Browse thousands of different options on Cheapflights for your next trip

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Complete your trip

Complete your trip to Luxembourg by adding a car rental and/or hotel reservation to your travel itinerary.
Luxembourg Airport car rentals

Top 5 airlines flying from Seattle to Luxembourg

Discover the top 5 airlines that operate flights from Seattle to Luxembourg. Compare their services, reliability, and customer satisfaction ratings to choose the airline that best suits your travel preferences and needs. Over the last 7 days, Cheapflights users made 2,558,603 searches. Data last updated March 23, 2026.
AirlineCheapestAverageFlexibilityOn-time
SWISSCheapest$306Average$306FlexibilityNo cancel feeOn-time79%
British AirwaysCheapest$396Average$528FlexibilityNo cancel feeOn-time70%
Air FranceCheapest$449Average$723FlexibilityNo cancel feeOn-time77%
United AirlinesCheapest$471Average$575FlexibilityNo cancel feeOn-time69%
LufthansaCheapest$490Average$683FlexibilityNo cancel feeOn-time76%

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