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Luxembourg

$446+ Cheap flights from Seattle (SEA) to Luxembourg

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 12/15. Fares are subject to change and may not be available on all flights or dates of travel.
SEA — LUX
Nov 29 — Dec 61
Sat 11/29
Sat 12/6
1 adult, Economy
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Find flight deals from Seattle to Luxembourg

Best flights from Seattle to Luxembourg
Discover carefully curated flight deals from Seattle to Luxembourg that have cost, travel time, and layovers in mind to ensure you get the best travel experience. Data last updated October 30, 2025.

This Air France deal was found by Cheapflights users on 10/29. 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 Air France is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Wed 1/72:10 pmSEA - LUX
1 stop14h 40mMultiple Airlines
Thu 1/1510:55 amLUX - SEA
1 stop33h 55mMultiple Airlines
Deal found 10/29$471
This Cheapflightsfares deal was found by Cheapflights users on 10/28. 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 Cheapflightsfares is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Sun 3/13:10 pmSEA - LUX
1 stop16h 10mLufthansa
Wed 5/136:10 amLUX - SEA
1 stop15h 10mLufthansa
Deal found 10/28$471
This British Airways deal was found by Cheapflights users on 10/30. 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 British Airways is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Mon 4/137:00 amSEA - LUX
2 stops18h 40mBritish Airways
Sun 4/199:20 pmLUX - SEA
1 stop23h 15mBritish Airways
Deal found 10/30$530
This United Airlines deal was found by Cheapflights users on 10/30. 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.
Mon 4/132:47 pmSEA - LUX
2 stops19h 48mUnited Airlines
Sun 4/198:25 amLUX - SEA
3 stops67h 47mUnited Airlines
Deal found 10/30$567
This FlightHub deal was found by Cheapflights users on 10/28. 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.
Sun 3/15:50 amSEA - LUX
2 stops25h 30mMultiple Airlines
Wed 5/136:10 amLUX - SEA
2 stops21h 26mMultiple Airlines
Deal found 10/28$471
This Cheapflightsfares deal was found by Cheapflights users on 10/29. 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 Cheapflightsfares is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Wed 1/72:10 pmSEA - LUX
2 stops17h 10mLufthansa
Thu 1/1510:50 amLUX - SEA
2 stops19h 07mLufthansa
Deal found 10/29$485
This Booking.com deal was found by Cheapflights users on 10/30. 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 Booking.com is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Mon 4/1310:10 amSEA - LUX
2 stops24h 25mMultiple Airlines
Sun 4/198:10 pmLUX - SEA
2 stops32h 08mMultiple Airlines
Deal found 10/30$524
This FlightHub deal was found by Cheapflights users on 10/30. 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.
Sat 4/118:00 pmSEA - LUX
2 stops35h 10mMultiple Airlines
Sun 4/1910:35 amLUX - SEA
1 stop34h 45mMultiple Airlines
Deal found 10/30$542

Cheap flight deals from Seattle to Luxembourg

Keep the following information in mind while searching for Seattle to Luxembourg flight deals. Data was last updated October 30, 2025.

Most accurate provider

eDreams
3 stars

Most trusted provider

Gurufare
3 stars

Round-trip from

$418
(Kiwi.com)

Popular in

June

Cheapest in

August

Average price

$835
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
Highest demand for flights based on searches. 17% potential increase in price ($151 potential increase over avg. RT price).
Search Deals
Cheapest flight prices on average. 4% potential price decrease ($27 potential savings vs. average RT price).
Search Deals
Average for round-trip flights in October 2025
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 October 30, 2025.
Use the filters below to find and compare flights from Seattle to Luxembourg that are best for you.

Fly from

Seattle

Fly to

Luxembourg

Route

Depart

Return

Price

SeattleLuxembourg

SEA - LUX

SEALUX

Seattle/Tacoma Intl

Wed 1/7

2:10 pm-1:50 pm

1 stop14h 40m

Luxembourg

Thu 1/15

10:55 am-11:50 am

1 stop33h 55m

$471

SeattleLuxembourg

SEA - LUX

SEALUX

Seattle/Tacoma Intl

Sun 3/1

3:10 pm-4:20 pm

1 stop16h 10m

Luxembourg

Wed 5/13

6:10 am-12:20 pm

1 stop15h 10m

$471

SeattleLuxembourg

SEA - LUX

SEALUX

Seattle/Tacoma Intl

Sun 3/1

5:50 am-4:20 pm

2 stops25h 30m

Luxembourg

Wed 5/13

6:10 am-6:36 pm

2 stops21h 26m

$471

SeattleLuxembourg

SEA - LUX

SEALUX

Seattle/Tacoma Intl

Wed 1/7

2:10 pm-4:20 pm

2 stops17h 10m

Luxembourg

Thu 1/15

10:50 am-8:57 pm

2 stops19h 07m

$485

SeattleLuxembourg

SEA - LUX

SEALUX

Seattle/Tacoma Intl

Mon 4/13

10:10 am-7:35 pm

2 stops24h 25m

Luxembourg

Sun 4/19

8:10 pm-7:18 pm

2 stops32h 08m

$524

SeattleLuxembourg

SEA - LUX

SEALUX

Seattle/Tacoma Intl

Mon 4/13

7:00 am-10:40 am

2 stops18h 40m

Luxembourg

Sun 4/19

9:20 pm-11:35 am

1 stop23h 15m

$530

SeattleLuxembourg

SEA - LUX

SEALUX

Seattle/Tacoma Intl

Sat 4/11

8:00 pm-4:10 pm

2 stops35h 10m

Luxembourg

Sun 4/19

10:35 am-12:20 pm

1 stop34h 45m

$542

SeattleLuxembourg

SEA - LUX

SEALUX

Seattle/Tacoma Intl

Mon 4/13

2:47 pm-7:35 pm

2 stops19h 48m

Luxembourg

Sun 4/19

8:25 am-7:12 pm

3 stops67h 47m

$567

SeattleLuxembourg

SEA - LUX

SEALUX

Seattle/Tacoma Intl

Mon 12/15

1:40 pm-10:00 pm

2 stops23h 20m

$446

SeattleLuxembourg

SEA - LUX

SEALUX

Seattle/Tacoma Intl

Mon 12/15

10:40 am-6:00 pm

3 stops22h 20m

$463

Flights are sorted by cheapest round-trip flights first.

Deals found on 10/29

Showing 1-10 of 14 results
1
2

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.

What is the cheapest time of day to fly from SEA to LU?

Find hourly flight availability from Seattle to Luxembourg. Discover flight options and departure times throughout the day, allowing you to choose a departure time that suits your schedule. Data last updated October 30, 2025.

A simple way to save on the total cost of your ticket is to fly from Seattle to Luxembourg in the evening. If you’re flexible enough to do this you can expect to save up to 24% on your trip compared to booking a flight at noon.

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 October 30, 2025.
Read through reviews of airlines operating flights from Seattle to Luxembourg, such as Delta, SWISS, and Air France. Reviews also offer insight into each airline's entertainment options, comfort, food, crew/service, and boarding process.
Delta
7.9
Good
7,993 reviews

Overall

7.9

Entertainment

7.9

Boarding

8.2

Food

7.3

Crew

8.5

Comfort

7.9

Reviews

1 / 20
8.0
Excellent

Matthew,Oct 2025

GSP - ATL

This is always a full flight since it is the connecting route to primary destinations through Atlanta. That said, the crew handles the full load well. Not much more to say, it is a short flight with no in-flight services due to the length.
Delta
7.9
Good
7,993 reviews
Delta
7.9
Good
7,993 reviews

Overall

7.9

Entertainment

7.9

Boarding

8.2

Food

7.3

Crew

8.5

Comfort

7.9

Reviews

1 / 20
8.0
Excellent

Matthew,Oct 2025

GSP - ATL

This is always a full flight since it is the connecting route to primary destinations through Atlanta. That said, the crew handles the full load well. Not much more to say, it is a short flight with no in-flight services due to the length.
SWISS
7.5
Good
1,775 reviews
Delta
7.9
Good
7,993 reviews

Overall

7.9

Entertainment

7.9

Boarding

8.2

Food

7.3

Crew

8.5

Comfort

7.9

Reviews

1 / 20
8.0
Excellent

Matthew,Oct 2025

GSP - ATL

This is always a full flight since it is the connecting route to primary destinations through Atlanta. That said, the crew handles the full load well. Not much more to say, it is a short flight with no in-flight services due to the length.
Air France
7.4
Good
1,482 reviews
Delta
7.9
Good
7,993 reviews

Overall

7.9

Entertainment

7.9

Boarding

8.2

Food

7.3

Crew

8.5

Comfort

7.9

Reviews

1 / 20
8.0
Excellent

Matthew,Oct 2025

GSP - ATL

This is always a full flight since it is the connecting route to primary destinations through Atlanta. That said, the crew handles the full load well. Not much more to say, it is a short flight with no in-flight services due to the length.
Lufthansa
6.8
Okay
7,541 reviews
Delta
7.9
Good
7,993 reviews

Overall

7.9

Entertainment

7.9

Boarding

8.2

Food

7.3

Crew

8.5

Comfort

7.9

Reviews

1 / 20
8.0
Excellent

Matthew,Oct 2025

GSP - ATL

This is always a full flight since it is the connecting route to primary destinations through Atlanta. That said, the crew handles the full load well. Not much more to say, it is a short flight with no in-flight services due to the length.
British Airways
6.7
Okay
7,487 reviews
Delta
7.9
Good
7,993 reviews

Overall

7.9

Entertainment

7.9

Boarding

8.2

Food

7.3

Crew

8.5

Comfort

7.9

Reviews

1 / 20
8.0
Excellent

Matthew,Oct 2025

GSP - ATL

This is always a full flight since it is the connecting route to primary destinations through Atlanta. That said, the crew handles the full load well. Not much more to say, it is a short flight with no in-flight services due to the length.

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.

  • What airport do you fly from for flights from Seattle to Luxembourg?

    If you book a flight to Luxembourg from Seattle, you will be flying from Seattle/Tacoma Intl, which is the city’s only airport. Seattle/Tacoma Intl (SEA) is located 11.4 mi from the center of Seattle.

  • How long is the flight from Seattle to Luxembourg?

    For as low as $471, Lufthansa can have you in Luxembourg from Seattle in 16h 10m. Seattle and Luxembourg are separated by a distance of 5057 mi.

  • What are the cheapest airlines to fly from Seattle to Luxembourg one-way?

    To fly one-way, consider booking your trip with Lufthansa, which is currently one of the cheapest options available, starting at $446. Air France flights start at $493 while deals on Delta start at $504 one-way.

  • 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

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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 October 30, 2025.
AirlineCheapestAverageFlexibilityOn-time
SWISSCheapest$306Average$306FlexibilityNo cancel feeOn-time79%
British AirwaysCheapest$396Average$528FlexibilityNo cancel feeOn-time70%
Air FranceCheapest$449Average$617FlexibilityNo cancel feeOn-time77%
DeltaCheapest$496Average$741FlexibilityNo cancel feeOn-timeN/A
LufthansaCheapest$591Average$760FlexibilityNo cancel feeOn-time76%

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