BRU - SEA

$464 Find Cheap Flights from Brussels to Seattle - Compare and Save

This is the cheapest one-way flight price found by a KAYAK user in the last 72 hours by searching for a flight from Brussels to Seattle departing on 9/10. 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

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Everything you should know

Cheapest round-trip
$681
Typical prices: $697-$848
Multiple Airlines
Wed 9/16Sat 9/26
BRU - SEA • 3 stops
Cheapest one-way
$464
Typical prices: $582-$854
Multiple Airlines
Thu 9/10
BRU - SEA • 3 stops
Top airlines
Cheapest • from $727 (round-trip)
Best reviews • 7.8 score
Airline reviews
Airline reviews
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Airline reviews
Airline reviews
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Nonstop flights
Not available
There are currently no direct flights between Brussels and Seattle. You'll need at least 1 connection.
Insights
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Top layover airports
Cheapest • Avg $660 (round-trip)
Shortest trip • 12h 25m (one-way)
Insights
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When to book
in advance
Our data shows that travelers who book at least 3 weeks in advance save around 33% compared to booking last minute.
Insights
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When to travel
Cheapest • 30% price drop
Most popular
Good to know
Good to know
+1
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Flight Deals
Booking Insights
Flight Deals

Cheap Flights from Brussels to Seattle (BRU-SEA)

 
Here are some of the best deals found on KAYAK recently from the most popular airlines for round-trip flights from Brussels to Seattle 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 Brussels to Seattle

Wed, Sep 16 - Sat, Sep 26
Multiple Airlines Logo
10:15 pm - 9:40 am
BRU
-
SEA
44h 25m
3 stops
Multiple Airlines Logo
7:00 pm - 12:55 pm
SEA
-
BRU
32h 55m
1 stop
$681Multiple Airlines
Mon, Sep 14 - Sat, Sep 26
Scandinavian Airlines Logo
7:10 pm - 1:45 pm
BRU
-
SEA
27h 35m
1 stop
Scandinavian Airlines Logo
3:55 pm - 2:35 pm
SEA
-
BRU
13h 40m
1 stop
$727Scandinavian Airlines
Wed, Sep 16 - Sat, Sep 19
Scandinavian Airlines Logo
9:10 pm - 1:45 pm
BRU
-
SEA
49h 35m
2 stops
Scandinavian Airlines Logo
3:55 pm - 11:00 pm
SEA
-
BRU
22h 05m
1 stop
$736Scandinavian Airlines
Fri, Sep 18 - Sun, Sep 27
Scandinavian Airlines Logo
5:45 am - 1:45 pm
BRU
-
SEA
17h 00m
1 stop
Scandinavian Airlines Logo
3:55 pm - 6:30 pm
SEA
-
BRU
17h 35m
1 stop
$743Scandinavian Airlines
Wed, Sep 16 - Sat, Sep 19
Scandinavian Airlines Logo
9:10 pm - 1:45 pm
BRU
-
SEA
49h 35m
2 stops
Scandinavian Airlines Logo
3:55 pm - 11:00 pm
SEA
-
BRU
22h 05m
1 stop
$753Scandinavian Airlines
Sat, Sep 12 - Sat, Sep 19
Scandinavian Airlines Logo
3:15 pm - 1:45 pm
BRU
-
SEA
31h 30m
1 stop
Scandinavian Airlines Logo
3:55 pm - 7:50 pm
SEA
-
BRU
18h 55m
1 stop
$757Scandinavian Airlines
Sat, Sep 12 - Sat, Sep 19
Scandinavian Airlines Logo
3:15 pm - 1:45 pm
BRU
-
SEA
31h 30m
1 stop
Scandinavian Airlines Logo
3:55 pm - 7:50 pm
SEA
-
BRU
18h 55m
1 stop
$759Scandinavian Airlines
Tue, Sep 15 - Sun, Sep 27
Scandinavian Airlines Logo
5:45 am - 1:45 pm
BRU
-
SEA
17h 00m
1 stop
Scandinavian Airlines Logo
3:55 pm - 6:30 pm
SEA
-
BRU
17h 35m
1 stop
$775Scandinavian Airlines
Sun, Nov 1 - Wed, Nov 25
Aer Lingus Logo
10:15 am - 6:20 pm
BRU
-
SEA
17h 05m
1 stop
Aer Lingus Logo
8:05 pm - 6:15 pm
SEA
-
BRU
13h 10m
1 stop
$778Aer Lingus
Thu, Sep 3 - Sun, Sep 27
Scandinavian Airlines Logo
8:30 pm - 1:45 pm
BRU
-
SEA
26h 15m
1 stop
Scandinavian Airlines Logo
3:55 pm - 6:30 pm
SEA
-
BRU
17h 35m
1 stop
$780Scandinavian Airlines
Booking Insights

KAYAK's insights & trends for Brussels to Seattle flights

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

How much is a round-trip flight from Brussels Bruxelles-National Airport to Seattle?

This analysis is based on the cheapest round-trip price found on KAYAK in the last 12 months by searching for a flight from Brussels Bruxelles-National Airport to Seattle departing in September.

What is the cheapest month to fly from Brussels Bruxelles-National Airport to Seattle?

To calculate monthly average prices, KAYAK takes all prices for each month over the last year for round-trip flights from Brussels Bruxelles-National Airport to Seattle, 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 Brussels Bruxelles-National Airport to Seattle is December, where tickets cost $597 (return) on average. On the other hand, the most expensive months are January and June, where the average cost of round-trip tickets is $1,232 and $1,039 respectively.

How far in advance should I book a flight from Brussels Bruxelles-National Airport to Seattle?

To calculate weekly average prices, KAYAK takes all prices for each week before departure over the last year for round-trip flights from Brussels Bruxelles-National Airport to Seattle, removes the top 0.1% to account for outliers, and then takes the average of all the values for each week.

To get a below average price on the flight from Brussels Bruxelles-National Airport to Seattle, you should book around 3 weeks before departure, which saves you about 33% compared to booking last minute. For the absolute cheapest price, our data suggests you should book 24 weeks before departure.

Good to know

Low seasonMarch
Cheapest flight$464
Best time to beat the crowds with an average 4% drop in price.
Most popular time to fly with an average 3% increase in price.
Flight from Brussels to Seattle

When to book flights from Brussels to Seattle

Are your dates flexible? Find out the best times to travel from Brussels to Seattle 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 Brussels to Seattle flights

  • What is the cheapest flight from Brussels Bruxelles-National Airport to Seattle?

    In the last 5 days, the lowest price for a flight from Brussels Bruxelles-National Airport to Seattle was $464 for a one-way ticket and $681 for a round-trip.

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

    Yes

  • Which airports will I be using when flying from Brussels to Seattle?

    When flying out of Brussels you will be using Brussels Bruxelles-National. You will be landing at Seattle, also known as Seattle/Tacoma Intl.

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

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

  • Which airline alliances offer flights from Brussels to Seattle?

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

  • Which is the best airline for flights from Brussels to Seattle, KLM or United Airlines?

    The two airlines most popular with KAYAK users for flights from Brussels to Seattle are KLM and United Airlines. With an average price for the route of $1,047 and an overall rating of 7.8, KLM is the most popular choice. United Airlines is also a great choice for the route, with an average price of $782 and an overall rating of 7.4.

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

    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 Brussels to Seattle.

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

    KAYAK’s flight Price Forecast tool uses historical data to determine whether the price for a flight to Seattle from Brussels 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 Brussels to Seattle?

    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 Seattle with an airline and back to Brussels with another airline. Booking your flights between Brussels and SEA 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 Brussels to Seattle?

    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 Seattle from Brussels up to 3 days before/after your preferred dates. You can then pick the flights that suit you best.

Reviews of the top 5 airlines serving from Brussels to Seattle

 
See real verified KAYAK customer reviews for airlines flying from Brussels to Seattle. 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 Brussels to Seattle? 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.
7.8
KLMOverall score based on 1532 reviews
8.4Crew
7.3Food
7.8Boarding
7.7Comfort
7.2Entertainment
Airline reviews

Crew is not the cheerful type. very slow meal service (this is their style as have flown this many times)

6.0 GoodGlenn, Feb 2026
AMS - JFK
Read more KLM reviews

Crew is not the cheerful type. very slow meal service (this is their style as have flown this many times)

Legroom not all it could be, especially when the seat in front is reclined. Otherwise it was good, food and beverage were nice.

This fight left ahead of time which meant it arrived early which was great. Staff were very professional, but as with all these Short hop Flights the food was a disappointing snack There was no entertainment on this flight, but I did not expect any

I flew premium economy and this was a good option. Although the seats didn’t recline much, I was able to get some sleep with my head propped against the window. The food was good and the entertainment was wonderful The staff were very attentive and professional

Great boarding, great short flight but no entertainment whatsoever and no wifi. Prepare to disembark by a staircase.

Seats were nice and comfy. Crew was polite and attentive. Business class is awesome and worth the money.

It was operated by Delta. Boarding took a long time. How difficult can it be? Overall decent trip. Liked the Salt Lake City airport. Better option than Chicago for transfers.

We left one hour late because of technical difficulties. The economy comfort seats are great for the price. The crew was mediocre, they do not provide a pleasant experience, they just deliver food and drinks and give orders, not very amicable, no service and hospitality focus.

I thought KLM was the best airline but the Lima - Amsterdam was 1 hours late, the Brussels - Amsterdam was 2.30 hours late and the Amsterdam - Lima was 30 minutes late

The boarding was one of the worst I’ve ever experienced. The fault lays on Ohare Airport and not so much the airline. The waiting area by the gate was the size to accommodate a regional flight for 20-30 people and right next to a busy walkway. When you cramped nearly 300 passengers into that space is was unbearable.

The flight was delayed by a hour and I wish they had communicated it sooner. No issues on the plane, it did take a while for food to come.

Smooth and easy boarding, comfortable for the entire 5 hour flight, and the seat back entertainment was great! I appreciated all the features, from location info and maps, movies, the ability to connect with Bluetooth headphones, and good selection of movies. Food was good, normal airline snacks (I didn’t purchase anything)

it was so bad. I tried to board my flight from vancouver to saskatoon. And to my surprise they did not board me cause the flight was changed and no email was send to me. and on my boarding pass which i got from seattle says different flight. I did not knew anyone from Vancouver, air canada crew was rude, i asked for today flight but they were rude and i had early morning dental appointment in saskatoon. I was so much in pain and my whole day is wasted today. and i suffered alot. They did provide me hotel but they did not provide me any food. I am really really disappointed first time had so bad experience with air canada. I may think twice to book it again. If i can get any reply or any composition that would be great. Thanks

leg space better than expected. two washrooms for one plane isn't enough.

The seats on this flight were almost roomy enough to be the basic amount needed for human existence. I think my favorite part of this flight was it landed at an A gate, which was the most palatial part of Sea-Tac I've ever seen - a massive improvement from the S gates.

Everything was fantastic. Modern plane. All the amenities! Although the paid snacks and meals are pure robbery. Like i understand airlines need to make money, but 11$ USD for an overnight oats with some nuts in it and barely any pieces of apple.... Highway robbery

An hour and a half late is UNACCEPTABLE. The negative impact to our family is unconscionable. And for the price we were forced to pay...

Our flight was delayed many times throughout the day. The final delay was about 8 hours. I spent time in line to speak to someone at their understaffed desk, and also spent time waiting online and then chatting with a service rep. None of the United employees were any help at all. I desperately wanted to go get rest and possibly re-book my trip but I was denied any compensation or voucher for a hotel. I was repeatedly told it was not United's fault and therefore they had no compensation to offer. Overall, a cold and callous experience.

Flight crew and pilots did great. Flight way delayed due to a part needing replacement. Based on what the pilot indicated- the maintenance crew could’ve resolved this more efficiently than replacing whole part- and taken less time

The most cramped seating I’ve ever experienced, (including budget airlines) with no food available for purchase on a nearly 6 hour flight.

Unlike my prior three connections on this latest journey, this flight was fairly good. Only issue was boarding as it was once again one of those Icelandic issues of bunch up, walk in the rain to a bus that then has you run up three flights of stairs to board the plain. I was in Saga class but the bus scramble eliminates any chance you get on first and have to then find a place to squeeze your carry on into an overhead that the people in economy populate so they can grab it on their way out up front. But unlike other Icelandic flights this journey I did find more the of the business class like accommodations then the other air segments. This one found a pillow and blanket waiting for me and I actually received a small cup of sparkling wine and had a bottle of water in place. Service was attentive and the flight departed and arrived on time. Received a menu and had choices of a hot or cold meal. I choose the hot which was cod and it was good. Decent size portion, salad and a choice of dinner rolls. Beverage menu was a selection of wines, beer and soft drinks. Desert was a small Tiramisu. Overall the six hour flight was a good experience for the price point.

We paid for saga class, which is the business class for international. My seat was broken and did not recline and my monitor for in-flight entertainment was broken.

The flight itself was fine, even with a one-hour delay leaving on the Reykjavik tarmac (the lost time was made up during flight). Our experience at the Reykjavik airport on arrival was terrible due mostly to the one hour it took for passport control. Only two stations were open for our category, and the room was full with a huge crowd.

The Icelandair crew was so kind!!! Thank you for making my first trip to Paris a great one!

I am not going to fillo this out for each leg of my trip. My first review holds for the experience

They wouldn’t check in my luggage even though I had one checked bag prepaid. So I took my bag to the gate and tried to check it in there and two employees scolded me for bringing a large bag to the gate. I told them I was trying to check it in and that it was prepaid, and they said they couldn’t guarantee that it would arrive at my destination but they finally let me drop it off when boarding the plane and pick it up right after exiting the plane. There was no food, and there was no entertainment.

The boarding process seem to take longer than necessary, resulting in a 20+ minute delay

One of the worst airlines I ever flew. Boarding is a disaster, they are always late, the planes are overly crowded. Everyone on my flight lost their connection because they were 2h late. Reykjavik is also not the best airport out there.

Flight was delayed. They did a terrible job rebooking me. Agent on the ground was useless. The partner airline who ran the plane was able to help me but Iceland air was useless

Flight delayed Delay to the gate upon arrival Baggage took more than an hour so we missed our connecting!!! Terrible experience!

It was okay. Mothers with rowdy children should be invited to sit in front of them.

We missed our connecting flight in Frankfurt do to security and all hell ensued then.we got rebooked to Washington got there round 10 am ish didn't find out till 630 we were rerouted to United!! Then we started getting updates

Food was much better than my outbound flight. On-time. Good service. I had a problem with my entertainment screen, but the attendant fixed it promptly.

I pre-ordered my meal and did not receive it. The seats are very old, uncomfortable and dirty. The crew was excellent and made my stay on board comfortable and enjoyable.

The only thing that the airport can improve which will help Lufthansa from delay flights is to warn the passengers that are flying to the USA to be earlier to the gate due to the documents check that in our case delayed the flight

I flew from Brussels to Munich, then from Munich to Denver. The flight from Brussels was only about 2.5 hours and it was okay. But the flight from Munich was about 12 hours and we sat on the plane for a very long time after everyone boarded. I paid something like $75 for a “preferred” seat in economy and it was so cramped my knees rubbed against the hard shell pocket. You couldn’t turn your legs to the side because the passenger next to you was too close. I was on the aisle but couldn’t put my leg out because there was often traffic or carts. Maybe I’m expecting too much but on such a long flight I’d like to see more comfortable seats. I think it was a United A380 plane. I won’t be flying anywhere that far away again. My legs and feet are still swollen 4 days later.

SEA to Munich flight was turbulent and you could hear rattling in the plane. The food was TERRIBLE, return flight was better. We will not fly Lufthansa in the future.

Flight was good, staff members were helpful and energetic, food can be more tasty.

On Time departure and arrival Entertainment system not very userfriendly

Fast boarding, great entertainment on board, lots of updates from the capitan during the trip, no lost luggage issues

Smooth flight. The seats were comfortable but the reclining mechanism didn't work very well. My wife's seat required the flight attendant to push the seat forward while she pushed the button. The leg support didn't want to return to its home under the seat. I ordered the diabetic meal which was full of carbs. It was low in sugar but carbs turn into sugar so was it really diabetic? Overall the flight was pleasant, long but pleasant.

Not my definition of first class. No leg room and barely any recline. The food was good. The crew was great. The comfort for the price I paid for London to Cairo was highway robbery. The Wi-Fi didn't work for me either.

The crew was very nice and pleasant. We were very reluctant to book our flight with British Airlines because we had bad experience with their flight attendants on the previous trips, they were rude and not helpful.

Adequate to good experience. Comfort was mediocre but everything else was good..

Boarding was poor. Why are first class passengers not boarded first?! Bus to the plane and then held on a packed bus because we were waiting for people on the bus before to finish boarding. Seat belt on the fist clas seat is very uncomfortable, cutting into your neck. Other than that crew, seating and food were all excellent. Entertainment, as usual - rubbish.

Had a very bad experience flying out of London. Our initial flight was cancelled without notice and the next flight had a layover of 8 extra hours. Me, my husband and my 8-year-old were already sick, and this further added to our problems. We paid extra for the seats: I was not even given our chosen seats which we paid for months before the trip. We were shoved into the available seats which were middle ones in the back (we had paid for front window, aisle, aisle). The seats were so uncomfortable and getting out of middle seats every so often (with a sick child) was a task. We had initially chosen British Airways because of the short layover, however, that went out of the window. Although unexpected things happen all the time and I understand customers have to adjust for the unplanned, however, how the airlines react and make the passengers comfortable during that time is the real test. We were not given any compensation for food or any arrangement to stay comfortable during that time. In fact, our paid seats were taken away as well.

Crew very helpful and friendly. Food is so so. Main meal is not always the best. Did have a choice of a snack part way which was either a cookie, corn snack, or similar. Second kind of meal was basically like a pizza pastry that really wasn’t a favorite but probably a European snack? Screens and selections of movies, tv and such were good. No WI-Fi unless you buy so no free texting or such on the long flight but I think that might be any overseas flight.

Please make sure the number of seats matches the number of overhead bins and passengers don't carry on more than one bag.

British airways keeps canceling our flights. I won’t be booking any future flights with them

Flight to Seattle was fine. We were delayed getting into our gate. The connection time was short and they make you go through security again which was slow.

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

Information on your arrival and departure airports