SEA - BRU

$283 Find Cheap Flights from Seattle to Brussels Airport

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 Brussels departing on 9/1. 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 Brussels Bruxelles-National Airport

 
These are the airlines KAYAK users have selected most often from within our search results in flight searches from Seattle to Brussels.
These are the airlines KAYAK users have selected most often from within our search results in flight searches from Seattle to Brussels.
Travelers love KAYAK
41,299,237 searches in the past 7 days on KAYAK

Save 24% or moreCompare multiple travel sites with one search.

Track pricesNot ready to book? Create a price alert for when prices drop.

Bundle and saveSave money when you bundle your flight + hotel.

Filter your dealsChoose cabin class, free Wi-Fi and more.

Everything you should know

Cheapest round-trip
$623
Typical prices: $676-$394
Icelandair
Sun 10/18Thu 10/29
SEA - BRU • 1 stop
Cheapest one-way
$283
Typical prices: $364-$449
Icelandair
Tue 9/1
SEA - BRU • 1 stop
Top airlines
Cheapest • from $623 (round-trip)
Best reviews • 7.9 score
Airline reviews
Airline reviews
+1
+1
Airline reviews
Airline reviews
+1
Nonstop flights
Not available
There are currently no direct flights between Seattle and Brussels. You'll need at least 1 connection.
Insights
Insights
Insights
Insights
Top layover airports
Cheapest • Avg $481 (round-trip)
Shortest trip • 12h 55m (one-way)
Insights
Insights
Insights
Insights
When to book
in advance
Our data shows that travelers who book at least 5 weeks in advance save around 23% compared to booking last minute.
Insights
Insights
Insights
Insights
When to travel
Cheapest • 18% price drop
Most popular
Good to know
Good to know
+1
+1
Good to know
Good to know
+1
Start a new search
KAYAK searches 100s of sites at once to find you the best travel deals.
We hope you love your trip to Brussels!
Flight Deals
Booking Insights
Flight Deals

Cheap Flights from Seattle to Brussels (SEA-BRU)

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

Sun, Oct 18 - Thu, Oct 29
Icelandair Logo
3:40 pm - 12:55 pm
SEA
-
BRU
12h 15m
1 stop
Icelandair Logo
12:50 pm - 6:00 pm
BRU
-
SEA
13h 10m
1 stop
$623Icelandair
Thu, Sep 24 - Wed, Oct 7
Icelandair Logo
7:00 pm - 12:55 pm
SEA
-
BRU
32h 55m
1 stop
Icelandair Logo
1:50 pm - 5:55 pm
BRU
-
SEA
13h 05m
1 stop
$624Icelandair
Mon, Oct 5 - Thu, Oct 15
Icelandair Logo
7:00 pm - 12:55 pm
SEA
-
BRU
32h 55m
1 stop
Icelandair Logo
1:50 pm - 5:55 pm
BRU
-
SEA
13h 05m
1 stop
$625Icelandair
Tue, Sep 1 - Wed, Sep 9
Icelandair Logo
3:40 pm - 12:55 pm
SEA
-
BRU
12h 15m
1 stop
Icelandair Logo
1:50 pm - 8:40 pm
BRU
-
SEA
15h 50m
1 stop
$637Icelandair
Tue, Sep 1 - Wed, Sep 9
Icelandair Logo
3:40 pm - 12:55 pm
SEA
-
BRU
12h 15m
1 stop
Icelandair Logo
1:50 pm - 5:55 pm
BRU
-
SEA
13h 05m
1 stop
$638Icelandair
Wed, Sep 2 - Wed, Sep 9
Icelandair Logo
11:25 pm - 12:55 pm
SEA
-
BRU
28h 30m
1 stop
Icelandair Logo
1:50 pm - 5:55 pm
BRU
-
SEA
13h 05m
1 stop
$640Icelandair
Tue, Sep 1 - Tue, Sep 8
Icelandair Logo
3:40 pm - 12:55 pm
SEA
-
BRU
12h 15m
1 stop
Icelandair Logo
1:50 pm - 8:40 pm
BRU
-
SEA
15h 50m
1 stop
$642Icelandair
Thu, Sep 3 - Wed, Sep 9
Icelandair Logo
11:25 pm - 12:55 pm
SEA
-
BRU
28h 30m
1 stop
Icelandair Logo
1:50 pm - 5:55 pm
BRU
-
SEA
13h 05m
1 stop
$644Icelandair
Sat, Aug 1 - Mon, Oct 5
Icelandair Logo
11:25 pm - 12:55 pm
SEA
-
BRU
28h 30m
1 stop
Icelandair Logo
1:50 pm - 5:55 pm
BRU
-
SEA
13h 05m
1 stop
$645Icelandair
Sun, Oct 18 - Thu, Oct 29
Icelandair Logo
3:40 pm - 12:55 pm
SEA
-
BRU
12h 15m
1 stop
Icelandair Logo
12:50 pm - 6:00 pm
BRU
-
SEA
13h 10m
1 stop
$647Icelandair
Booking Insights

KAYAK's insights & trends for Seattle to Brussels flights

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

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

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

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

To calculate monthly average prices, KAYAK takes all prices for each month over the last year for round-trip flights from Seattle to Brussels Bruxelles-National Airport, 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 Brussels Bruxelles-National Airport is January, where tickets cost $510 (return) on average. On the other hand, the most expensive months are June and December, where the average cost of round-trip tickets is $886 and $882 respectively.

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

To calculate weekly average prices, KAYAK takes all prices for each week before departure over the last year for round-trip flights from Seattle to Brussels Bruxelles-National Airport, 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 Seattle to Brussels Bruxelles-National Airport, you should book around 5 weeks before departure, which saves you about 23% compared to booking last minute. For the absolute cheapest price, our data suggests you should book 13 weeks before departure.

Good to know

Low seasonJanuary
Cheapest flight$283
Best time to beat the crowds with an average 18% drop in price.
Most popular time to fly and prices are also 3% lower on average.
Flight from Seattle to Brussels Airport

When to book flights from Seattle to Brussels

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

  • Traveling with your child can be convenient if you consider flying with Condor from SEA to BRU. They offer family-friendly services, including special family check-in counters, pre-boarding for those with young children, changing facilities, and in-flight entertainment with child-friendly content.

    What are the transport options from Brussels Airport to downtown?

  • You can connect from BRU Airport to Brussels North in downtown Brussels using the Ic train of Belgian Railways servicing NMBS and SNCB Lines with an interval of 10 minutes. STIB bus links BRU Airport with Schuman in downtown Brussels and operates at a 20-mins interval. De Lijn bus connects BRU Airport to downtown Brussels and operates after every 30 minutes. FlixBus bus runs six times weekly and connects BRU Airport to downtown Brussels.

    What are some layover airports for flights from Seattle to Brussels?

  • All flights have layovers on the SEA to BRU route. Some of the stopover airports include Frankfurt (FR) by Condor and Lufthansa, Keflavik (KEF) by Iceland, Dublin (DUB) by Aer Lingus, and London (LHR) by Finnair, Iberia, American, and British.

    Which lounges can I access at Seattle Airport?

  • SEA Airport has lounges where you can relax while waiting for your BRU flight. Some of the lounges offer exclusive access to their Business- and First-class passengers free of charge. They include Centurion Lounge on Concourse B at the Airside, Delta Sky Club Lounge on Concourse A at the Airside, and Alaska Lounge with three locations on Concourse D, Concourse C, and North Satellite at the Airside.

    What is the carry-on policy for flights from Seattle to Brussels?

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

    In the last 3 days, the lowest price for a flight from Seattle to Brussels Bruxelles-National Airport was $283 for a one-way ticket and $623 for a round-trip.

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

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

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

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

  • Which airline alliances offer flights from Seattle to Brussels Airport?

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

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

    The two airlines most popular with KAYAK users for flights from Seattle to Brussels are Delta and KLM. With an average price for the route of $623 and an overall rating of 7.9, Delta is the most popular choice. KLM is also a great choice for the route, with an average price of $722 and an overall rating of 7.8.

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

    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 Brussels Airport.

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

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

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

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

KAYAK’s top tips for finding a cheap flight from Seattle to Brussels Bruxelles-National Airport

  • Yes. Airlines flying from Miami to Vilnius assist passengers with special needs. Each airline operating on this route runs a wheelchair assistance program to help passengers with limited mobility get through the airport. Airlines like United Airlines, Lufthansa, and Turkish Airlines offer airport attendants who assist travelers with reduced mobility with their luggage from check-in areas to baggage claim on arrival.
  • Consider flying with Tap Air Portugal from Seattle–Tacoma Airport - Seatac (SEA) to Brussels Airport - Zaventem (BRU) to enjoy personalized meals that match your dietary needs. They include age-appropriate meals for children, Gluten-free meals for their gluten-intolerant passengers, and vegan, diabetic, and vegetarian meals specified for these passengers.
  • Condor and Tap Air Portugal allow minors aged 5 to 11 to travel unaccompanied from SEA to BRU. Their travel is only restricted to domestic flights. Both airlines have ground personnel who can help them through check-in. An assigned in-flight crew supervises the unaccompanied minors throughout their flight for enhanced safety and comfort.
  • SWISS offers extensive accessible services to special needs passengers traveling from SEA to BRU. The airline offer wheelchair assistance to passengers with reduced mobility. Their low-vision and hard-to-hear passengers have access to other forms of communication, such as braille, audio descriptions, and written or visual announcements.
  • Since the journey from SEA to BRU is long, consider flying Business- or First-class with Scandinavian Airlines for enhanced comfort. They offer these passengers special services and amenities, including fine dining options, spacious seats, and increased allowed size of carry-on bags.

Reviews of the top 5 airlines serving from Seattle to Brussels

 
See real verified KAYAK customer reviews for airlines flying from Seattle to Brussels. 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 Brussels? 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 8451 reviews
7.8Comfort
8.1Boarding
7.8Entertainment
8.5Crew
7.2Food
Airline reviews

Enjoyed it very much. Especially liked the free WiFi that Delta offers.

10.0 ExcellentBenjamin, May 2026
CLT - MSP
Read more Delta reviews

Enjoyed it very much. Especially liked the free WiFi that Delta offers.

Smooth flight. Left on time, and got in 15 minutes early. Onboard video was great

For some reason, TSA Atlanta didn’t have my bag on the flight on time and they don’t have to provide Delta a reason for that.

WiFi didn’t work on two of four planes. Flight attendants were not overly friendly or welcoming. Planes were extremely slow to board and deplane.

Delta does a great job with entertainment and free wifi. I can still be in touch with my colleagues while in the air.

Aside from a completely packed plane, I really have no complaints.

Bus to plane was delayed for no apparent reason and our luggage was still on the belt when they shut it off. Took about 20 minutes to turn it back on to get our luggage.

It was a pleasant surprise to have complimentary Wi-Fi on the flight

Much better than Latam, the worse airline company ever. I hope I don't have the need to fly Latam ever in my life again.

Seats in Delta Main are unbelievably close to the seat in front of. Hard to get a backpack under the seat.

Outstanding even though the 330 was one of the oldest in the fleet. The difference was the attentiveness and responsiveness of a really experienced flight attendant. For airline food great variety of interesting choices and good tastes supported by a good wine selection.

There were no charge points for phones on the economy seats. The seats were comfortable overall. Food was okay.. flight was on time

The flight was delayed. The aircraft was unclean. Promised seat was not given due to change in Aircraft. Not one crew on ground was in a position to give any response. Amsterdam Airport is AVIODABLE Over crowded. Over Expensive. Poor Services.

The crew were unprofessional with a racist element. I was physically abused as well from one of the crew members

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

Empty seats next to me - wish it had been for a longer flight!!

Flight was on time, staff are friendly and helpful onboard.

Terrible last row seats many seats available but no offer to move to better seat

Delay and had to run between flight to get my connection due to this delay but besides that the overall experience was ok. I arrived with just an hour of delay.

At the airport, terrible, I do not want to even remember it. It was too humiliating for a business class passenger.

Late plane. Only one crew on the ground so we b had to wait for Denver flight to come in, board, and depart. At 78 yrs of age I was not pleased trying to get my connection. What really made me angry was the notification you sent me to hurry up or I would miss my connection. Why tell me to hurry up when you got me in late. It was not a good way of treating customers.

No complaints other than luggage carousel was incorrectly guiding passengers to the wrong carousel on the screen.

Did not like that we couldn't complete check in on-line without providing pictures of our passports. Worry about identity theft. We had no delays and boarding was handled In an efficient manner.

We were a little disappointed to not be able to complete check in online without uploading pics of passports. Also we have KTN's and they weren't on our boarding passes when we got to security. Had to trek back to counter to have them fix.

Excellent service in Polaris class IAD to ZRH. Arrived rested and well fed after the overnight flight.

My flight time was changed without any notification to me which ruined my time sensitive plans so I ended up completely changing my travel plans and no reimbursement.

Excellent! I got to Munich and was transferred to my Lufthansa flight quickly, in 15 to 20 minutes, so I did not miss my flight. However, I had checked my overhead bag at the boarding gate in Tampa. That got to Tunis the next day. That is to be expected.

It's a short hop. My carryon was checked at the gate, I didn't have to drag it all over the airport. Excellent wheelchair assist.

WiFi didn’t exist , seats were super cramped, lights stayed on near my seat for a long time while others were dimmed, the food/trash/drink cart hit my shoulder at least a couple of times while moving, food options were down to just one option by the time it got to my row, the utensils were garbage (knife bent at a couple of places by the time I was done eating) the spoon was very flimsy plastic

I had enough leg room. The check in was smooth. Good food

At least one soda free, felt like I was nickeled to death.

On-time arrivals and departures. Crew helpful and friendly. Yet everything costs extra: seat selection, food, even airphones!

Was a bit surprised that Icelandair flies a domestically configured 757s on long-haul flights to Iceland (no lie-flat seats in business class).

I had no idea that my ticket only paid for my right to get on the plane. They charged me $130 for my carry-on bag because it was 1 inch too big she claimed but it wasn’t! Then they wanted another fee for everything. I had no idea that Icelandair had changed to such a bargain basement airline. I was very disappointed.

Second time with Saga Premium, everything was fab, but the entertainment centre on both my flights didn't work, plus the seat on the NY to Rek flight (Airbus) was so solid and so uncomfortable. The 737Max flight's seat was much, much better.

The staff was kind and helpful. There was no food, and you needed to bring your own earphones to use the entertainment, which I didn’t know.

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.

Delays at check-in, seemed like they were short ground staff at the time and some passengers needed extra processing.

Problems checking in both on the laptop and on the app. No free seating available at check-in as advertised - must pay for EVERY seat between $23 and $75. No way to cancel seat choice. App menus and site menus are not responsive, and some items are impossible to find. Crew and mobile assistance are friendly and helpful.

Food - Non-Existent. You pay for everything. It is strictly Pay-to-Play!

Good food, overall very comfy. The flight was full so obviously not optimal, but it is what it is.

Perfect airline, super friendly, great service, tasty food. Would fly again.

Parents with permanently crying baby on board. Neither parents nor crew did anything to calm the baby. The food was extremely disappointing. Seafood stew was very, very small! Not even appetizer size! Seat had a gap in the back. Had to use a pillow to fill it.

Food choices limited & not enticing Seats quite uncomfortable & difficult to control

Definitely get premium economy on a flight this long if you can. Your legs and while body will thank you.

Flight was delayed by several hours and then cancelled due to weather. But Staff was very helpful getting me on a different flight. United should offer food coupons and tooth brush and paste for stranded passengers

I upgraded to the business class cabin. It was the poorest business class I have ever experienced. No access to any business lounge in Tampa airport. Seats are not comfortable. I had a window seat and had to step/crawl over the next seat. Food was mediocre and service below average for business class. Bathroom location was ridiculous. No place to wait. I cannot believe I paid this kind of money and will never fly Lufthansa Discover again. They really should reimburse me somehow.

Boarding was disorganized. The door to one to the toilets wouldn’t lock. The plane was shockingly cramped, and clearly used for domestic flights due to the menus for items to sell domestic travelers. United should be ashamed of its small seats, tiny unclean toilets, and money grubbing stance toward services, compared to Lufthansa, Emirates, and most international carriers United is awful.

Was never allowed on and not refunded the full amount of the ticket plus charged a $300 processing fee.

Terrible. Lost our luggage for 4 days. Did not advise passengers there was a strike in Barcelona Airport and had zero personnel on hand at airport to advise passengers on where to go to file claims. We had to fend for ourselves. No assistance at all other than an online claims submission process that we had to find out about on our own.

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

Information on your arrival and departure airports