SEA - LUX

$453 Find Cheap Flights from Seattle to Luxembourg

This is the cheapest round-trip flight price found by a KAYAK user in the last 72 hours by searching for a flight from Seattle to Luxembourg departing on 10/29. 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

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
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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

Wed, Oct 29 - Wed, Nov 5
 Logo
7:44 am - 10:15 amSEA-LUX
18h 31m2 stops
 Logo
11:00 am - 9:47 pmLUX-SEA
19h 47m2 stops
Wed, Oct 29 - Wed, Nov 5
Air France Logo
3:10 pm - 1:50 pmSEA-LUX
14h 40m1 stop
Air France Logo
7:30 am - 1:20 pmLUX-SEA
14h 50m1 stop
$457Air France
Find Deal
Wed, Oct 29 - Wed, Nov 5
Air France Logo
11:15 am - 10:35 amSEA-LUX
15h 20m2 stops
Air France Logo
7:30 am - 1:20 pmLUX-SEA
14h 50m1 stop
$461Air France
Find Deal
Mon, Oct 20 - Mon, Nov 3
Delta Logo
5:40 pm - 10:00 amSEA-LUX
31h 20m1 stop
Delta Logo
2:45 pm - 6:24 pmLUX-SEA
36h 39m2 stops
$482Delta
Find Deal
Mon, Oct 20 - Mon, Nov 3
Delta Logo
7:10 am - 1:45 pmSEA-LUX
21h 35m2 stops
Delta Logo
2:45 pm - 2:45 pmLUX-SEA
33h 00m2 stops
$486Delta
Find Deal
Tue, Oct 14 - Tue, Oct 21
Lufthansa Logo
10:00 am - 10:00 amSEA-LUX
15h 00m2 stops
Lufthansa Logo
6:15 am - 11:55 amLUX-SEA
14h 40m1 stop
$527Lufthansa
Find Deal
Fri, Mar 6 - Sat, Mar 14
Lufthansa Logo
2:00 pm - 1:35 pmSEA-LUX
14h 35m1 stop
Lufthansa Logo
8:10 am - 1:10 pmLUX-SEA
13h 00m1 stop
$598Lufthansa
Find Deal
Sat, Oct 4 - Mon, Oct 13
Air Canada Logo
7:15 pm - 1:40 pmSEA-LUX
33h 25m2 stops
Air Canada Logo
2:30 pm - 6:36 pmLUX-SEA
37h 06m2 stops
$619Air Canada
Find Deal
Sun, Nov 2 - Mon, Nov 3
British Airways Logo
6:50 pm - 4:20 pmSEA-LUX
12h 30m1 stop
British Airways Logo
9:55 pm - 4:55 pmLUX-SEA
28h 00m1 stop
$904British Airways
Find Deal
Sun, Nov 2 - Mon, Nov 3
British Airways Logo
6:50 pm - 4:20 pmSEA-LUX
12h 30m1 stop
British Airways Logo
9:55 pm - 6:20 pmLUX-SEA
53h 25m2 stops
$1,102British Airways
Find Deal

Everything you should know

Top airlines
Air France
Cheapest • from $457 (round-trip)
Delta
Best reviews • 7.9 score
Airline reviews
Airline reviews
+1
+1
Airline reviews
Airline reviews
+1
When to travel
August
Cheapest • 33% price drop
April
Most popular
Good to know
Good to know
+1
+1
Good to know
Good to know
+1
Cheapest round-trip
$453
Overall average: $659
Multiple Airlines
Wed 10/29Wed 11/5
SEA - LUX • 2 stops
Cheapest one-way
Multiple Airlines
Mon 9/15
SEA - LUX • multi-stop
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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!
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.

What’s the cheapest day of the week to fly from Seattle to Luxembourg?

The average price of all round-trip flights from Seattle to Luxembourg clicked on KAYAK for each day over the last 12 months.

Your flight ticket price will generally be cheaper if you fly to Luxembourg on a Wednesday and more expensive on a Thursday. On your return trip to Seattle, you should consider flying back on a Sunday, and avoid Tuesdays for better deals.

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

To calculate monthly average prices, KAYAK takes all prices for each month over the last year for round-trip flights from Seattle to Luxembourg, removes the top 0.1% to account for outliers, and then takes the median of all values for each month.

The cheapest month for flights from Seattle to Luxembourg is August, where tickets cost $456 (return) on average. On the other hand, the most expensive months are June and July, where the average cost of round-trip tickets is $983 and $908 respectively.

Good to know

Low seasonJanuary
Cheapest flight$453
Best time to beat the crowds with an average 18% drop in price.
Most popular time to fly with an average 4% increase in price.
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 $453 for a round-trip ticket.

  • 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?

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

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

    The two airlines most popular with KAYAK users for flights from Seattle to Luxembourg are Delta and Air France. With an average price for the route of $741 and an overall rating of 7.9, Delta is the most popular choice. Air France is also a great choice for the route, with an average price of $695 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.
7.9
DeltaOverall score based on 7954 reviews
8.5Crew
8.2Boarding
7.9Entertainment
7.3Food
7.9Comfort
Airline reviews

Perfect flight both ways. On time, courteous staff, plane comfortable and cool. Best domestic flights I’ve had in awhile.

10.0 ExcellentAnonymous, Sep 2025CLT - BOS
Read more Delta reviews

Perfect flight both ways. On time, courteous staff, plane comfortable and cool. Best domestic flights I’ve had in awhile.

The food was terrible especially for a 15 hour international flight. The crew was unpleasant as well.

Really low quality food especially for an international flight. The crew also was surprisingly unpleasant except couple of ladies. I know we were not in first class but that’s no reason to treat customers as less.

Flight delayed for two and half hours and then canceled altogether due to mechanical issues. No mechanic onsite to fix so had to send one from LAX.

Quick check in. Everything went smooth. I don't know what can be done about airline food.

Crew was good. The reservation got mixed up and they didn't have my TSA number. I am also a Silver Medallion and wasn't able to use Sky Priority.

Delta made it easy, comfortable and timely. The crew was fantastic.

This route with Delta always has delays or is cancelled. Aircrafts seem smaller and older. I fly Delta quite a bit - haven’t had issues with the international flights. But this route has always been the troublesome one

Nothing special. The crew never went out of their way for anything.

Three seats in first class were broken and while they were able to still acommodate us it was looking very touch and go and they had others they could not acommodate

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.

Old airplanes small seats expensive tickets, not as expected overall and not comfortable according to the price

It was an OK flight with below mediocre service by their flight attendants

Wasted a lot of time trying to find the CDG lounge - it was not next to the connecting flight gate like the Air France staff said.

My experience was good overall, the quality of the food really decreased! There used to be a choice between meat and fish now it’s between chicken and pasta! In the choices of entertainment meditation has been added which is very good. Soft chair workout to improve blood circulation and avoid phlebitis should be added.

The only reason the overall rating wasn't "excellent" was due to problems in claiming luggage. The bags are delivered to the main area (Cinta 35) for domestic passengers, but to a DIFFERENT ROOM for international arrivees. After waiting 30 minutes, someone (who didn't appear to be from Air France or the airport) told us to go to another area. There we found our bags, which appeared to have been awaiting us for a while. We had to go through a bag check before leaving the airport. If we had been alerted to this possibility, or better yet, been to go directly to Cinta 34, we could have eliminated quite a bit of waiting.

I wish that the meal included a vegetable or even a salad instead of couscous! Why serve chicken with rice AND couscous? Service was good overall though a bit lacking in friendliness. Usually on air france I've been offered a glass of champagne before dinner, wine with dinner, and a digestif after dinner. We were only offered wine this time!

It was not Air France but Air Europa. But confusion over our checked luggage. Whether it was checked all the way to Tenerife or not. It was not. Had to line up again in Departures. At least our Sky Priority was honoured. Flight was fine.

I liked Quiet people around me. Crew could have helped people with overhead luggage so they aren't moving other peoples bags around and causing problems for people that had there bags there first

The flight and crew were good. The customer experience on the ground could have been better. We had to reschedule our flight because of a delay on the previous flight. The attendants working the desk in Washington DC were not helpful. They told us to scan a QR code and that would get us rebooked. Why couldn't two people standing at their computers do this? We had to chat with someone to get everything figured out. It was extremely confusing.

The plane was delayed by two hours in Chicago which led to us missing the next flight. Lufthansa rebooked the flight and booked us a hotel for the night in Frankfurt. The level of customer service and getting us taken care of was superb. The flight crew and the service on the ground was superb.

It was a short flight, everything was good with it.

Flight was delayed over one hour and I had to pay to select my seat, even though my booking supposedly had free selection (I paid extra for this at time of booking)

Stop charging for alcohol overseas flights and start taking cash again not everyone wants to pay with card if the person is bigger give him seat on the outside seats not the middle in between the people is common sense and mainly if you fly for Lufthansa provides the sam service and experience...

good entertainment package but rather small seats for business class

The male attendant has zero personality. It seemed like he was over worked or hated his job, not once did he smile or made any contact with the people on the plane. Strictly business and call it a day!

Booked Economy but it translated to economy light for Lufthansa so now we are stuck paying an extra $75 per person both ways for our checked bags. If I had known that, I would have never booked these tickets because it came out to be more than other options. The booking in the kayak side clearly says Economy and has a link to the inormation for Lufthansa which states Economy included a checked bag. Super annoyed about that.

The flight from Dulles to Munich was just okay. The seats were comfortable and extra foot room was noticeable in comfort plus. Disappointed in the booking in so much I requested an aisle seat and then was assigned a middle seat. The food was inedible. Movie choices were moderate. I usually fly Delta, but this WA flight was cheaper. Next time, I'll happily pay the extra to fly Delta.

The seating has become ridiculous… like a contest to see how narrow and short they can be made- forcing anyone over 5’1 to pay more to not be twisting oneself into a pretzel. Really insane- would have thought BA was better than this. Frankly- it cancels out a lot of the positive aspects.

flight was delayed from BWI to London - missed my connecting flight & then connecting flight (also British Air) was delayed - food is awful, TV & movie selection is great

Three major things that led to my low rating, 1. Internet wasn't available for the whole time, and 2. TV became available way into flight, after numerous system reboots, and 3. Food is not good at all.

Super tight economy class. My knees were hitting the back of seat in front of me (I'm only 5'6"). My small backpack (sized according to their required dimensions) would not fit under the seat in front of me because there is a box (is that the life jacket?) in the way. Over all, extremely uncomfortable. I forgive the tasteless food, but the tight seating was torture

Didn’t fly with them as someone had cancelled my flight

Some how my flight was canceled, neither BA or Justfly.com accepted responsibility. I only found out about this the day before when I tried to check in. I had to book another flight which due to the time ( day before) cost me $300 more. I was still receiving notifications about the flight even when I was on another flight from you. So no my flight to London was not good.

Online check-in 24 hours in advance something seems not so easy to check in to pick seats and to print a boarding pass

I like the crew, very welcoming. Food can be better. The seat arms don’t go up so. I could use the empty seat next to mine to relax better. 3hrs delay 😠

Boarding was efficient and quick, crew was very attentive, seats were comfortable.

Everything was very good! I personally struggled with the heat in the cabin for the first 2 hours

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

Information on your arrival and departure airports

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