HomeSearch by dateVacation packagesHotelsFlight dealsCar rentalTravel tips & news
Luxembourg

$447+ Cheap flights from Seattle (SEA) to Luxembourg (LUX)

This is the cheapest round-trip flight price found by a Cheapflights user in the last 72 hours by searching for a flight departing on 10/7. Fares are subject to change and may not be available on all flights or dates of travel.
SEA — LUX
May 6 — May 131
Tue 5/6
Tue 5/13
1 adult, Economy
We work with more than 300 partners to bring you better travel deals

Find cheap flights from Seattle to Luxembourg with Cheapflights

1. Tell us where you want to go

Enter your travel information like dates, passengers, trip type (one-way or round trip), and preferred cabin class then click “Find deals”

2. Select your favorite providers

We find the providers serving your travel needs. Choose up to four travel providers to compare side-by-side for flights, hotels, or car rentals.

3. Compare prices and book

Review each provider’s pricing and select the best option for you! Book through your favorite provider’s website for a seamless experience.

Cheap 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 May 1, 2025.

Most accurate provider

Gurufare
3 stars

Most trusted provider

Gurufare
3 stars

Round-trip from

$643
(British Airways)

One-way from

$458
(American Airlines)

Popular in

June

Cheapest in

November

Average price

$595
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. 25% potential increase in price ($238 potential increase over avg. RT price).
Search Deals
Cheapest flight prices on average. 7% potential price decrease ($53 potential savings vs. average RT price).
Search Deals
Average for round-trip flights in May 2025
Search Deals

Find 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 May 1, 2025.

This American Airlines deal was found by Cheapflights users on 4/30. 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 American Airlines is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Tue 10/71:30 pmSEA - LUX
1 stop12h 10mAmerican Airlines
Tue 11/45:15 pmLUX - SEA
1 stop32h 40mAmerican Airlines
Deal found 4/30$447
This British Airways deal was found by Cheapflights users on 4/30. 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 5/191:30 pmSEA - LUX
1 stop22h 50mBritish Airways
Wed 5/289:35 pmLUX - SEA
1 stop23h 00mBritish Airways
Deal found 4/30$493
This United Airlines deal was found by Cheapflights users on 4/30. 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.
Tue 10/78:42 amSEA - LUX
3 stops25h 53mUnited Airlines
Tue 11/49:40 amLUX - SEA
2 stops35h 00mUnited Airlines
Deal found 4/30$517
This Booking.com deal was found by Cheapflights users on 4/30. 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.
Fri 8/17:20 amSEA - LUX
2 stops21h 30mMultiple Airlines
Fri 8/221:30 pmLUX - SEA
1 stop12h 29mMultiple Airlines
Deal found 4/30$555
This Air France deal was found by Cheapflights users on 4/30. 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 Air France is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Fri 8/11:30 pmSEA - LUX
1 stop15h 20mAir France
Fri 8/227:30 amLUX - SEA
1 stop12h 45mAir France
Deal found 4/30$655
This SWISS deal was found by Cheapflights users on 4/30. 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 SWISS is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Wed 7/912:40 pmSEA - LUX
2 stops20h 40mSWISS
Tue 7/157:10 pmLUX - SEA
2 stops36h 32mSWISS
Deal found 4/30$702
This Air Canada deal was found by Cheapflights users on 4/30. 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 Air Canada is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Sun 5/115:30 amSEA - LUX
2 stops43h 10mAir Canada
Sun 5/181:35 pmLUX - SEA
2 stops33h 38mAir Canada
Deal found 4/30$712
This FlightHub deal was found by Cheapflights users on 4/30. 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.
Sun 5/112:15 pmSEA - LUX
1 stop14h 35mLufthansa
Sun 5/181:35 pmLUX - SEA
1 stop12h 24mLufthansa
Deal found 4/30$716
This Delta deal was found by Cheapflights users on 4/30. 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 Delta is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Wed 7/96:00 amSEA - LUX
2 stops26h 25mDelta
Wed 7/166:10 amLUX - SEA
2 stops25h 38mDelta
Deal found 4/30$790
This Kiwi.com deal was found by Cheapflights users on 4/30. 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 Kiwi.com is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Wed 6/112:10 pmSEA - LUX
1 stop14h 35mKLM
Wed 6/182:15 pmLUX - SEA
1 stop30h 25mKLM
Deal found 4/30$802
This KAYAK deal was found by Cheapflights users on 4/30. 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 KAYAK is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Fri 7/118:10 pmSEA - LUX
2 stops53h 20mScandinavian Airlines
Tue 7/156:25 pmLUX - SEA
1 stop28h 25mScandinavian Airlines
Deal found 4/30$1,618
This Ovago deal was found by Cheapflights users on 4/30. 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 Ovago is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Fri 7/1111:30 amSEA - LUX
2 stops20h 25mTAP AIR PORTUGAL
Sun 7/1312:25 pmLUX - SEA
2 stops42h 03mTAP AIR PORTUGAL
Deal found 4/30$2,474

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 May 1, 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

Tue 10/7

1:30 pm-10:40 am

1 stop12h 10m

Luxembourg

Tue 11/4

5:15 pm-4:55 pm

1 stop32h 40m

$447

SeattleLuxembourg

SEA - LUX

SEALUX

Seattle/Tacoma Intl

Mon 5/19

1:30 pm-9:20 pm

1 stop22h 50m

Luxembourg

Wed 5/28

9:35 pm-11:35 am

1 stop23h 00m

$493

SeattleLuxembourg

SEA - LUX

SEALUX

Seattle/Tacoma Intl

Tue 10/7

8:42 am-7:35 pm

3 stops25h 53m

Luxembourg

Tue 11/4

9:40 am-11:40 am

2 stops35h 00m

$517

SeattleLuxembourg

SEA - LUX

SEALUX

Seattle/Tacoma Intl

Fri 8/1

7:20 am-1:50 pm

2 stops21h 30m

Luxembourg

Fri 8/22

1:30 pm-4:59 pm

1 stop12h 29m

$555

SeattleLuxembourg

SEA - LUX

SEALUX

Seattle/Tacoma Intl

Fri 8/1

1:30 pm-1:50 pm

1 stop15h 20m

Luxembourg

Fri 8/22

7:30 am-11:15 am

1 stop12h 45m

$655

SeattleLuxembourg

SEA - LUX

SEALUX

Seattle/Tacoma Intl

Wed 7/9

12:40 pm-6:20 pm

2 stops20h 40m

Luxembourg

Tue 7/15

7:10 pm-10:42 pm

2 stops36h 32m

$702

SeattleLuxembourg

SEA - LUX

SEALUX

Seattle/Tacoma Intl

Sun 5/11

5:30 am-9:40 am

2 stops43h 10m

Luxembourg

Sun 5/18

1:35 pm-2:13 pm

2 stops33h 38m

$712

SeattleLuxembourg

SEA - LUX

SEALUX

Seattle/Tacoma Intl

Sun 5/11

2:15 pm-1:50 pm

1 stop14h 35m

Luxembourg

Sun 5/18

1:35 pm-4:59 pm

1 stop12h 24m

$716

SeattleLuxembourg

SEA - LUX

SEALUX

Seattle/Tacoma Intl

Wed 7/9

6:00 am-5:25 pm

2 stops26h 25m

Luxembourg

Wed 7/16

6:10 am-10:48 pm

2 stops25h 38m

$790

SeattleLuxembourg

SEA - LUX

SEALUX

Seattle/Tacoma Intl

Wed 6/11

2:10 pm-1:45 pm

1 stop14h 35m

Luxembourg

Wed 6/18

2:15 pm-11:40 am

1 stop30h 25m

$802

Flights are sorted by cheapest round-trip flights first.

Deals found on 4/30

Showing 1-10 of 17 results
1
2

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 May.
ProviderPrice AccuracyTrust Score*
FlightHubPrice Accuracy3 starsTrust Score*2 stars
GurufarePrice Accuracy3 starsTrust Score*3 stars
CheapflightsfaresPrice Accuracy3 starsTrust Score*2 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 Gurufare to be most consistent on Cheapflights vs. Gurufare Users can find the same prices on Seattle-Luxembourg flight deals on Cheapflights vs. Gurufare >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 Gurufare the most. Gurufare 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, February is the cheapest month in which you can book a flight from Seattle to Luxembourg (average of $638). Flying from Seattle to Luxembourg in June is currently the most expensive (average of $1,178). 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 LUX?

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 May 1, 2025.

Unlike at noon, when flights are generally more expensive, you can save up to 25% on flights from Seattle to Luxembourg by exploring options for tickets in the evening.

What is the cheapest day to fly from Seattle to Luxembourg?

Use this chart to determine the cheapest time to fly round-trip from Seattle to Luxembourg. Price data was last updated on December 16, 2024.

Travelers seeking maximum savings on their Seattle to Luxembourg flight should consider departing on Sunday evenings when fares are most often at their lowest. Monday at noon flights should be avoided if possible as fares are typically the most expensive at this time.

Rainfall in Luxembourg by month

Plan your trip to Luxembourg by taking into account the average rainfall totals by month.

In terms of precipitation, rainfall in Luxembourg ranges from 2.0 - 2.8 inches per month. November is typically the wettest month, when rainfall can reach 2.8 in. February is typically the driest time to visit Luxembourg when rainfall is around 2.0 in.

Temperature in Luxembourg by month

Plan your trip to Luxembourg by taking into account the average temperature totals by month.

If weather is an important factor for your trip to Luxembourg, use this chart to help with planning. For those seeking warmer temperatures, July is the ideal time of year to visit, when temperatures reach an average of 62.6 F. Travelers looking to avoid the cold should look outside of January, when temperatures are typically at their lowest (around 32.0 F).

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 May 1, 2025.
Get a feel of what it's like to fly with Delta, KLM and SWISS from Seattle to Luxembourg by reading reviews from past customers. In addition to providing an overall rating, users have also rated airlines in terms of entertainment options, comfort, food, crew/service, and boarding process.
Delta
8.0
Very good
7,934 reviews

Comfort

7.9

Food

7.3

Boarding

8.2

Overall

8.0

Entertainment

7.9

Crew

8.5

Reviews

1 / 20
10.0
Excellent

Aaron,Oct 2024

LAX - LHR

This was a flight operated by Virgin Atlantic in their Upper Class cabin. Overall, an outstanding experience.
Delta
8.0
Very good
7,934 reviews
Delta
8.0
Very good
7,934 reviews

Comfort

7.9

Food

7.3

Boarding

8.2

Overall

8.0

Entertainment

7.9

Crew

8.5

Reviews

1 / 20
10.0
Excellent

Aaron,Oct 2024

LAX - LHR

This was a flight operated by Virgin Atlantic in their Upper Class cabin. Overall, an outstanding experience.
KLM
7.8
Good
1,334 reviews
Delta
8.0
Very good
7,934 reviews

Comfort

7.9

Food

7.3

Boarding

8.2

Overall

8.0

Entertainment

7.9

Crew

8.5

Reviews

1 / 20
10.0
Excellent

Aaron,Oct 2024

LAX - LHR

This was a flight operated by Virgin Atlantic in their Upper Class cabin. Overall, an outstanding experience.
SWISS
7.5
Good
1,588 reviews
Delta
8.0
Very good
7,934 reviews

Comfort

7.9

Food

7.3

Boarding

8.2

Overall

8.0

Entertainment

7.9

Crew

8.5

Reviews

1 / 20
10.0
Excellent

Aaron,Oct 2024

LAX - LHR

This was a flight operated by Virgin Atlantic in their Upper Class cabin. Overall, an outstanding experience.
Air France
7.4
Good
1,446 reviews
Delta
8.0
Very good
7,934 reviews

Comfort

7.9

Food

7.3

Boarding

8.2

Overall

8.0

Entertainment

7.9

Crew

8.5

Reviews

1 / 20
10.0
Excellent

Aaron,Oct 2024

LAX - LHR

This was a flight operated by Virgin Atlantic in their Upper Class cabin. Overall, an outstanding experience.
United Airlines
7.4
Good
8,696 reviews
Delta
8.0
Very good
7,934 reviews

Comfort

7.9

Food

7.3

Boarding

8.2

Overall

8.0

Entertainment

7.9

Crew

8.5

Reviews

1 / 20
10.0
Excellent

Aaron,Oct 2024

LAX - LHR

This was a flight operated by Virgin Atlantic in their Upper Class cabin. Overall, an outstanding experience.

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

    British Airways, at $643, was found to be the cheapest airline from Seattle to Luxembourg.Alternate airlines to your destination round-trip include Air Canada and American Airlines. British Airways is 10% cheaper than the average price of flights available within the next 90 days to this destination.

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

    To fly one-way, consider booking your trip with American Airlines, which is currently one of the cheapest options available, starting at $458. Air France flights start at $483 while deals on SWISS start at $484 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, February is the cheapest month in which you can book a flight from Seattle to Luxembourg (average of $638). Flying from Seattle to Luxembourg in June is currently the most expensive (average of $1,178). 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

Browse thousands of different options on Cheapflights for your next trip

Toggle through the tabs below to find thousands of options on Cheapflights for your next trip.

Alternative routes for Seattle to Luxembourg

See prices for flight routes from nearby airports that may be better suited for you.
Portland to Luxembourg flights

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 May 1, 2025.
AirlineCheapestAverageFlexibilityOn-time
British AirwaysCheapest$443Average$524FlexibilityNo cancel feeOn-time70%
Air FranceCheapest$510Average$749FlexibilityNo cancel feeOn-time77%
DeltaCheapest$521Average$692FlexibilityNo cancel feeOn-timeN/A
KLMCheapest$576Average$741FlexibilityNo cancel feeOn-time75%
LufthansaCheapest$616Average$834FlexibilityNo cancel feeOn-time76%

100% Free

Cheapflights is completely free to use, so you can start saving the moment you arrive.

Book with Flexibility

Our users can plan ahead with confidence and find flights with no change fees

Travel Smart

Millions of people come to us for their flight needs every year. We help make travel planning easy by providing useful insights and data-driven graphs that can inform your decisions.