SEA - LUX

$379 Find Cheap Flights from Seattle to Luxembourg

This is the cheapest one-way flight price found by a KAYAK user in the last 72 hours by searching for a flight from Seattle to Luxembourg departing on 2/22. Fares are subject to change and may not be available on all flights or dates of travel. Click the price to replicate the search for this deal.
1 adult
1 adult, Economy, 0 bags

KAYAK searches hundreds of travel sites at once for deals on flights to Luxembourg

 
These are the airlines KAYAK users have selected most often from within our search results in flight searches from Seattle to Luxembourg, as well as popular online travel agencies
These are the airlines KAYAK users have selected most often from within our search results in flight searches from Seattle to Luxembourg, as well as popular online travel agencies
Travelers love KAYAK
41’299’237 searches in the past 7 days on KAYAK

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Everything you should know

Cheapest round-trip
$414
British Airways
Mon 1/26Mon 2/9
SEA - LUX • 2 stops
Cheapest one-way
$356
Multiple Airlines
Sun 2/22
SEA - LUX • 3 stops
Top airlines
British Airways
Cheapest • from $414 (round-trip)
SWISS
Best reviews • 7.5 score
Airline reviews
Airline reviews
+1
+1
Airline reviews
Airline reviews
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KAYAK searches 100s of sites at once to find you the best travel deals.
We hope you love your trip to Luxembourg!
Flight Deals
Booking Insights
Flight Deals

Cheap Flights from Seattle to Luxembourg (SEA-LUX)

 
Here are some of the best deals found on KAYAK recently from the most popular airlines for round-trip flights from Seattle to Luxembourg that are departing in the next months. While these flights were available on KAYAK in the last 72 hours, prices and availability are subject to change and deals may expire.
Discover the best prices for you by selecting your travel dates on KAYAK.

Recent round-trip flight deals from Seattle to Luxembourg

Mon, Jan 26 - Mon, Feb 9
British Airways Logo
2:04 pm - 9:05 pm
SEA
-
LUX
22h 01m2 stops
British Airways Logo
9:55 pm - 4:55 pm
LUX
-
SEA
28h 00m1 stop
$414British Airways
Mon, Jan 26 - Mon, Feb 9
British Airways Logo
2:04 pm - 9:05 pm
SEA
-
LUX
22h 01m2 stops
British Airways Logo
9:55 pm - 4:55 pm
LUX
-
SEA
28h 00m1 stop
$431British Airways
Sun, Mar 1 - Wed, May 13
Air France Logo
2:10 pm - 1:50 pm
SEA
-
LUX
14h 40m1 stop
Air France Logo
7:30 am - 5:39 pm
LUX
-
SEA
19h 09m1 stop
$458Air France
Sun, Mar 1 - Wed, May 13
Air France Logo
8:30 am - 10:35 am
SEA
-
LUX
17h 05m2 stops
Air France Logo
10:50 am - 5:39 pm
LUX
-
SEA
15h 49m1 stop
$463Air France
Sun, Mar 1 - Wed, May 13
American Airlines Logo
11:45 am - 4:20 pm
SEA
-
LUX
19h 35m2 stops
American Airlines Logo
11:40 am - 11:39 pm
LUX
-
SEA
20h 59m2 stops
$464American Airlines
Mon, Jan 26 - Mon, Feb 9
KLM Logo
3:10 pm - 5:50 pm
SEA
-
LUX
17h 40m1 stop
KLM Logo
10:55 am - 11:40 am
LUX
-
SEA
33h 45m1 stop
$471KLM
Mon, Jan 26 - Mon, Feb 9
SWISS Logo
12:35 pm - 6:15 pm
SEA
-
LUX
20h 40m2 stops
SWISS Logo
7:05 pm - 9:12 pm
LUX
-
SEA
35h 07m2 stops
$472SWISS
Mon, Jan 26 - Mon, Feb 9
KLM Logo
3:10 pm - 10:20 pm
SEA
-
LUX
22h 10m1 stop
KLM Logo
10:55 am - 11:40 am
LUX
-
SEA
33h 45m1 stop
$473KLM
Mon, Jan 26 - Mon, Feb 9
British Airways Logo
2:04 pm - 9:05 pm
SEA
-
LUX
22h 01m2 stops
British Airways Logo
10:50 am - 2:34 pm
LUX
-
SEA
36h 44m2 stops
$481British Airways
Sun, Feb 22 - Sun, Mar 1
British Airways Logo
1:52 pm - 4:20 pm
SEA
-
LUX
17h 28m2 stops
British Airways Logo
6:15 pm - 11:04 pm
LUX
-
SEA
37h 49m2 stops
$486British Airways
Booking Insights

KAYAK's insights & trends for Seattle to Luxembourg flights

Get data-powered insights and trends into flights from Seattle to Luxembourg to help you find the cheapest flights, the best time to fly and much more.

Which airlines provide the cheapest flights from Seattle to Luxembourg?

The cheapest round-trip price for the route for each airline clicked by KAYAK users in the last 72 hours.

In the past 3 days, the cheapest round-trip tickets from Seattle to Luxembourg were found on British Airways ($414) and Air France ($458).

Which airlines fly non-stop between Seattle and Luxembourg?

Airline and price data is aggregated from results in KAYAK’s search results from the last 2 weeks for round-trip flights from Seattle to Luxembourg.

There are 4 airlines that fly nonstop from Seattle to Luxembourg. They are: Air France, British Airways, Lufthansa and SWISS. The cheapest price of all airlines flying this route was found with SWISS at $306 for a round-trip flight. On average, the best prices for this route can be found at SWISS.

Good to know

Low seasonAugust
Cheapest flight$356
Best time to beat the crowds with an average 37% drop in price.
Most popular time to fly and prices are also 37% lower on average.
Flight from Seattle to Luxembourg

When to book flights from Seattle to Luxembourg

Are your dates flexible? Find out the best times to travel from Seattle to Luxembourg based on our flight data from the last year. Discover the cheapest month and even day to fly.
Estimated round-trip price
KAYAK looks at all historical flight data for each date to provide a predicted price for one-way trips or round-trips with a duration up to 40 days. While we try to provide actual minimum prices for each date, some prices are predictions and actual prices may differ.

FAQs for booking flights from Seattle to Luxembourg

  • What is the cheapest flight from Seattle to Luxembourg?

    In the last 3 days, the lowest price for a flight from Seattle to Luxembourg was $379 for a one-way ticket and $414 for a round-trip.

  • Do I need a passport to fly between Seattle and Luxembourg?

    Yes, you’ll need a passport to travel to Luxembourg from Seattle.

  • Which aircraft models fly most regularly from Seattle to Luxembourg?

    We unfortunately don’t have that data for this specific route.

  • Which airline alliances offer flights from Seattle to Luxembourg?

    oneworld, SkyTeam, and Star Alliance are the airline alliances operating flights between Seattle and Luxembourg, with oneworld being the most commonly used for this route.

  • Which is the best airline for flights from Seattle to Luxembourg, SWISS or Air France?

    The two airlines most popular with KAYAK users for flights from Seattle to Luxembourg are SWISS and Air France. With an average price for the route of $306 and an overall rating of 7.5, SWISS is the most popular choice. Air France is also a great choice for the route, with an average price of $561 and an overall rating of 7.4.

  • How does KAYAK find such low prices on flights from Seattle to Luxembourg?

    KAYAK is a travel search engine. That means we look across the web to find the best prices we can find for our users. With over 2 billion flight queries processed yearly, we are able to display a variety of prices and options on flights from Seattle to Luxembourg.

  • How does KAYAK's flight Price Forecast tool help me choose the right time to buy my flight ticket from Seattle to Luxembourg?

    KAYAK’s flight Price Forecast tool uses historical data to determine whether the price for a flight to Luxembourg from Seattle is likely to change within 7 days, so travelers know whether to wait or book now.

  • What is the Hacker Fare option on flights from Seattle to Luxembourg?

    Hacker Fares allow you to combine one-way tickets in order to save you money over a traditional round-trip ticket. You could then fly to Luxembourg with an airline and back to Seattle with another airline. Booking your flights between Seattle and LUX can sometimes prove cheaper using this method.

  • What is KAYAK's "flexible dates" feature and why should I care when looking for a flight from Seattle to Luxembourg?

    Sometimes travel dates aren't set in stone. If your preferred travel dates have some wiggle room, flexible dates will show you all the options when flying to Luxembourg from Seattle up to 3 days before/after your preferred dates. You can then pick the flights that suit you best.

Reviews of the top 4 airlines serving from Seattle to Luxembourg

 
See real verified KAYAK customer reviews for airlines flying from Seattle to Luxembourg. Airline scores are aggregated from all reviews left by passengers on KAYAK after flying with an airline. KAYAK doesn’t show reviews that are older than 5 years. Learn how KAYAK collects reviews.
Need help choosing which airline to fly with from Seattle to Luxembourg? KAYAK airline reviews give an overall score for each airline based on loads of factors, including comfort, boarding, in-flight entertainment and more, to make your decision easier. See airline scores according to verified KAYAK customer reviews.
7.5
SWISSOverall score based on 1843 reviews
6.8Entertainment
7.1Food
7.7Boarding
8.3Crew
7.4Comfort
Airline reviews

Horrible!! The WiFi was not working, the food was awful

2.0 MediocreAnonymous, Dec 2025
IAD - ZRH
Read more SWISS reviews

Horrible!! The WiFi was not working, the food was awful

We’ve never been more uncomfortable on a flight than we have on this particular one. The seats in front of us reclined so far back that when the person reclined their seat of broccoli, it almost hit me in the face and left me with literally no room to move that said I had to recline my seed in which made the person behind me upset. It seemed like the seats also would recline without even pressing the button in the armrest and would unrecline as well for that same reason, and it also seemed that some seats reclined more than others. The bottom cushions of the seat were so thin that even after one hour of an 11 hour flight, our tailbones were so sore. It seemed like an overall old airplane. It also didn’t have individual air vents and it was extremely hot the entire flight. Several passengers were commenting on how hot it was. The breakfast was some kind of flavorless triangle, puffy egg, laying in a watery bed of steamed peppers and onions and spinach. It was not appetizing at all. The flight crew was extremely nice so that was a nice thing this flight attendant. They let us try different types of Swiss sodas, which was really nice and the dinner was actually delicious but still overall given the other considerations. It was pretty much a miserable flight without basic seat comfort.

Food used to be better and comfort was not attainable after 5 hours everything starts hurting.

horrible.. they cause such a problem and my daughter 14 years old was stranded in san francisco

I can’t even the whole trip was a catastrophe

Poor. Seats uncomfortable. No leg room. Hot and humid the whole trip. Food and staffs were ok.

I purchased a one way business class ticket from Geneva to Miami but the check in agent said I had an economy ticket and later upgraded to business class. This was not the case, I had a single business class transaction. I was forced to pay for my second checked bag. I am unsure of why this happened. But I won’t use Kayak again for business class tickets.

The seats were so close together, when the man in front of me put his seat back, the screen in front of me was 9 inches from my face. There is no way to lean forward if I needed to pick something up. It was pretty uncomfortable for a ten hour flight. I was very surprised.

The food was good. Most the staff was pleasant. The flight would be drastically improved with WiFi on a long international flight.

Swiss airline do not allow online check-in before 24 hrs, this is very inconvenient to us. I tried many ways such as booking code(6 numbers) or 13 booking numbers , neither of them work, Lufthansa is better which allow us to check in even before 30 hrs, so we can assign our seats( not many people want spend extra money to assign seats on top of airfare which is already spent.)

Not consistent with the food quality (I mean taste not freshness)

Safe and stable made me sleepy and I slept and dreamt 😂😂😂😂

Food was really mediocre for premium economy in comparison to other airlines… the crew was nowhere to be found… 14 hour flight…

I don’t like that an equipment change caused my seat to change from 23A to 44A. The boarding was also delayed. The crew were excellent, however and very attentive. The food was not bad.

Worst airlines either. First leg was delayed because of crew not available. My connection was missed so they booked me automatically the next day! But, impossible to get anyone on site, web site does not let me access my reservation anymore, confirmed by useless agents over the phone. My 2-leg trip with part in business class arriving at 4:10pm ends up in an awful 3-leg arriving at 9pm the next day with no way to even choose the seats and of course at the very end of the plane. I can understand problems arrive but the way Air France handle it is just unacceptable. You are on your own. Apparently getting you to your destination is the only thing they consider their duty. The customer experience and fatigue is none of their concern. And I have a status with them. I will reconsider my priorities when flying with Air France and encourage everyone to do the same.

Excellent, Lima to Paris. But Paris to Amsterdam, delayed, missed my flight and KLM treated its missed flights passengers very badly, terribly bad. No hotel accommodation given. Passengers were told to find their own hotel accommodation and claim at reasonable rate and left the booth and literally with armed Police Officers listening to passengers complains. For three hours, after moving by Uber from hotel to hotel and calling and booking online, no hotel was available. I had to return to the airport and seat/sleep on the benches, suffering the cold, and rats running around until my new allocated flight the next day. It was the most terrible KLM treatment even seen and being a Business Class passenger. Still mentally suffering to date as a result.

3 hour delay but out of their control. App said I get vouchers but when I applied for them, they were nowhere to be found in my account

I bought business class tickets but the seats are exactly like economy with no comfort seats nor an empty seat next to me provided. Very poor, low quality airline.

I don't understand the concept of paying to get your personal luggage onboard and then asked to check it in.... either sell the space or don't, its a hassle to carry those all through the airport just to make a check in at the last minute.

It was a great experience. The only thing I would have changed was that the bathrooms were never cleaned and they got very dirty.

Crew was professional and great, flight was clean. However food was pathetic. I ordered a Hindu meal assuming no meat but they served chicken. Need to be very specific- Hindu meal should be categorize as Vegetarian - no meat or egg. Or it should be specific that we are serving meat.

Late flight Delays Poor service Poor staff Worst airline ever

Ground staff and cabin crew were excellent. Flight was perfectly on time. Zero issues.

Even after a delay, getting off the ground, thanks for keeping me safe, the airline made certain that my connecting flight was rebooked to get me to my final destination. It was actually rebooked twice, and my luggage still managed to meet me. The airline gave me a credit for food and beverage to be used at the airport vendors, regretfully, the credit did not transfer to my final boarding pass. Oh, well…

Trip was smooth, good drew, average meal, almost cold coffee. Excellent landing. Did not enjoy going down the stairs, walking to the gate, walking up the stairs, going a long walk to the exchange gate, and going down the stairs again to be bussed all the way where we originally landed to take our next flight! Over all an average experience. Thank you.

I booked extra leg room, due to seat neighbor i now consider extra shoulder and arm room as well. Seems like the seats shrink in width now The crew was very friendly and professional ( 100%). Food was good not great, breakfast was bad, a dry slice of bread would have been better. Facilities clean.

Luggage transfer in Chicago was not performed in time. I received my luggage at my destination two days later.

love the crews and my only problem was the delay at Frankfurt was very bad. I have travelled with Lufthansa for over 30 years now and this was cost me some planned business appointment

The flight delay made the connection a bit tight but that's outside the flight crew's control.

We just made it to our connecting flight. A long, long speed walk!

Loved the boarding option from Business class lounge, experience on flight was excellent, plenty of good food choices

Getting the boarding passes between the BA and AA apps was very clunky.

The airline was not clear about a new departure time so we got to the airport early anyway. The flight left early which was great because of weather. The check in process was very easy and staff were friendly and helpful. The crew was great and our flight was very good.

Awful it always is unfortunately is the only way to fly direct to london

I travelled in business class and was disappointed by lack of service, curt and borderline rude time of the crew and to top it off, all of my luggage was delayed. It was like pulling teeth to even report the missing luggage and recover it the next day from the airport.

Plane was extremely delayed, but not all of it was BA fault (some was). Worst part was lack of room - this had as much space as an Allegiant flight. I thought transatlantic usually gave you an extra inch or two, but not this one. Entertainment system sporadically worked and didn’t have great options. Overhead bins are old and tiny, not as good as aunties new planes.

Boarding was poor. All groups called immediately one after the other resulting in a long queue in the jetty/jet bridge. Seats were very hard and and did not recline on a 4.5 hour flight. No food was available. Plane was cold. There was no entertainment.

The cramped seats are cruel and unusual punishment and may violate the Geneva code.

Check in was was and the agent was very friendly and helpful The lounge was nice...boarding was straight from the lounge Everything worked at our seats, and video entertainment was good ..food was mediocre

The flight was excellent in World Travellor plus. Well worth the extra money. Boarding at Phoenix was the usual poorly organized event. Very stressful.

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

Information on your arrival and departure airports