Find flights
Deals
Insights
When to book
FAQs & Tips

Find cheap flights from Seattle to Brussels from $467

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 8/4. 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
0 bags
Fri 5/24
Fri 5/31

Search hundreds of travel sites at once for deals on flights to Brussels

 
These are the airlines KAYAK users have selected most often from within our search results in flight searches from Seattle to Brussels, 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 Brussels, as well as popular online travel agencies
In the last 7 days travelers have searched 44,632,927 times on KAYAK, and here is why:

Save 22% or moreCompare multiple travel sites with one search.

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

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

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

Cheap flight deals 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 and deals for you by selecting your travel dates.
Choose your dates
3:50 pm - 12:50 pmSEA-BRU
12h 00m1 stop
1:50 pm - 5:55 pmBRU-SEA
13h 05m1 stop
$518Icelandair
Find Deal
Sat, Oct 12 - Tue, Oct 22
3:50 pm - 12:50 pmSEA-BRU
12h 00m1 stop
1:50 pm - 8:35 pmBRU-SEA
15h 45m1 stop
$522Icelandair
Find Deal
Wed, Sep 11 - Fri, Sep 20
6:45 am - 9:00 amSEA-BRU
17h 15m2 stops
10:00 am - 9:15 pmBRU-SEA
20h 15m1 stop
$560
Find Deal
Wed, Sep 11 - Fri, Sep 20
12:50 pm - 7:15 amSEA-BRU
33h 25m1 stop
2:15 pm - 11:18 amBRU-SEA
30h 03m2 stops
$563United Airlines
Find Deal
Sat, Oct 12 - Tue, Oct 22
7:40 am - 6:20 amSEA-BRU
13h 40m1 stop
9:30 am - 10:51 amBRU-SEA
34h 21m1 stop
$566United Airlines
Find Deal
Mon, Aug 12 - Wed, Aug 21
10:55 pm - 8:45 amSEA-BRU
24h 50m1 stop
10:45 am - 10:20 pmBRU-SEA
20h 35m1 stop
$570Delta
Find Deal
Sat, Sep 14 - Tue, Oct 1
7:40 pm - 7:15 pmSEA-BRU
14h 35m1 stop
8:00 pm - 11:35 amBRU-SEA
24h 35m1 stop
$571British Airways
Find Deal
Sun, Sep 15 - Mon, Sep 30
7:40 am - 10:05 amSEA-BRU
17h 25m2 stops
9:10 pm - 11:30 amBRU-SEA
23h 20m1 stop
$576British Airways
Find Deal
Mon, Sep 16 - Wed, Oct 2
7:20 am - 8:45 amSEA-BRU
16h 25m1 stop
3:05 pm - 10:10 amBRU-SEA
28h 05m1 stop
$589Delta
Find Deal
Mon, May 6 - Mon, May 13
10:50 pm - 7:50 amSEA-BRU
24h 00m1 stop
9:30 am - 10:05 amBRU-SEA
33h 35m2 stops
$616
Find Deal
Sat, Aug 31 - Sun, Sep 8

Flights from Seattle to Brussels - Travel Insights & Trends

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.

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

The average price of all flights from Seattle to Brussels clicked on KAYAK for each day over the last 12 months.
If your flying dates are flexible, you should consider flying to Brussels on a Sunday, as we generally find the cheapest rates on that day for this route. On the other hand, Thursday is the most expensive day to fly from Seattle to Brussels. For your return ticket, we recommend flying on a Wednesday and avoiding Sundays for the best deals.

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

To calculate monthly average prices, KAYAK takes all prices for each month over the last year for flights from Seattle to Brussels, 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 is November, where tickets cost $684 on average. On the other hand, the most expensive months are June and July, where the average cost of tickets is $1,606 and $1,247 respectively.

How far in advance should I book a flight from Seattle to Brussels?

To calculate daily average prices, KAYAK takes all prices for each day before departure over the last year for flights from Seattle to Brussels, removes the top 0.1% to account for outliers, and then takes the average of all the values for each month.
To get a below average price on the flight from Seattle to Brussels, you should book around 2 days before departure. For the absolute cheapest price, our data suggests you should book 82 days before departure.

Which airlines provide the cheapest flights from Seattle to Brussels?

The cheapest price for the route for each airline clicked by KAYAK users in the last 72 hours.
In the past 3 days, the cheapest one-way tickets to Brussels from Seattle were found on British Airways ($474) and SWISS ($483), and the lowest round-trip tickets were found on Icelandair ($518) and United Airlines ($563).

Good to know

Cheapest flight

$467
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 flights from Seattle to Brussels

  • What is the cheapest flight from Seattle to Brussels?

    In the last 3 days, the lowest price for a flight from Seattle to Brussels was $467 for a one-way ticket and $518 for a round-trip.

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

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

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

    Seattle is served by only 1 airport and there are 2 airports in Brussels. You will leave Seattle from Seattle/Tacoma Intl and you will be arriving in Brussels at one of these airports: Brussels Bruxelles-National or Charleroi Brussels.

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

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

  • Which airline alliances offer flights from Seattle to Brussels?

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

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

    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.

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

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

    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 with an airline and back to Seattle with another airline.

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

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

See more FAQs

Book cheap flights from Seattle to Brussels

Recent one-way flight deals

 
Only flying one-way? Below are some of the best one-way flight deals from Seattle to Brussels found on KAYAK in the last 72 hours.
8/4Sun
2 stops
29h 45mSEA-BRU
$467
5/7Tue
1 stopBritish Airways
15h 50mSEA-BRU
$474
5/7Tue
3 stops
41h 36mSEA-CRL
$480
5/8Wed
2 stopsSWISS
34h 40mSEA-BRU
$483
5/7Tue
3 stops
48h 55mSEA-BRU
$484
5/8Wed
1 stopBrussels Airlines
14h 09mSEA-BRU
$485
5/21Tue
2 stopsUnited Airlines
19h 00mSEA-BRU
$494
9/2Mon
1 stopUnited Airlines
23h 35mSEA-BRU
$495
9/2Mon
2 stopsAir Canada
17h 05mSEA-BRU
$502
8/4Sun
1 stopAir Canada
13h 40mSEA-BRU
$573

Search by stops

Search by airline

Search by price

Seattle - Brussels Flights

Departure:

Seattle (SEA)United States

Cabin classes:

Browse origins:

Browse destinations: