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Cheap flights from Belgium to Seattle from $411

This is the cheapest one-way flight price found by a momondo user in the last 72 hours by searching for a flight from Belgium to Seattle departing on 9/16. Fares may change, and may not be available for all flights or travel dates. Click the price to refresh the search for this deal.
1 adult
1 adult, Economy, 0 bags

Discover deals from 900+ travel sites with momondo.

Find the cheapest flights from Belgium to Seattle

Recent round-trip flight deals from Belgium to Seattle

Enter your travel dates to find the best prices.
Multiple Airlines Logo
8:55 pm - 9:04 pmBRU  Brussels Bruxelles-National-SEA Seattle/Tacoma Intl
33h 09m3 stops Madrid Barajas Halifax Intl Toronto Pearson Intl
Multiple Airlines Logo
7:00 pm - 12:55 pmSEA  Seattle/Tacoma Intl-BRU Brussels Bruxelles-National
32h 55m1 stop Reykjavik Keflavik Intl
$763Multiple Airlines
Fri, Sep 11 - Fri, Sep 25
Scandinavian Airlines Logo
10:20 am - 1:45 pmBRU  Brussels Bruxelles-National-SEA Seattle/Tacoma Intl
12h 25m1 stop Kastrup Copenhagen
Scandinavian Airlines Logo
3:55 pm - 7:50 pmSEA  Seattle/Tacoma Intl-BRU Brussels Bruxelles-National
18h 55m1 stop Kastrup Copenhagen
$764Scandinavian Airlines
Fri, Sep 25 - Fri, Oct 9
Scandinavian Airlines Logo
10:20 am - 1:45 pmBRU  Brussels Bruxelles-National-SEA Seattle/Tacoma Intl
12h 25m1 stop Kastrup Copenhagen
Scandinavian Airlines Logo
3:55 pm - 7:50 pmSEA  Seattle/Tacoma Intl-BRU Brussels Bruxelles-National
18h 55m1 stop Kastrup Copenhagen
$765Scandinavian Airlines
Fri, Sep 25 - Fri, Oct 9
Multiple Airlines Logo
9:10 pm - 5:55 pmBRU  Brussels Bruxelles-National-SEA Seattle/Tacoma Intl
29h 45m3 stops Oslo Gardermoen Stockholm Arlanda Reykjavik Keflavik Intl
Multiple Airlines Logo
3:40 pm - 7:35 amSEA  Seattle/Tacoma Intl-BRU Brussels Bruxelles-National
30h 55m3 stops Reykjavik Keflavik Intl Stockholm Arlanda Amsterdam Schiphol
$794Multiple Airlines
Mon, Oct 5 - Fri, Oct 9
Icelandair Logo
1:50 pm - 8:40 pmBRU  Brussels Bruxelles-National-SEA Seattle/Tacoma Intl
15h 50m1 stop Reykjavik Keflavik Intl
Icelandair Logo
3:40 pm - 12:55 pmSEA  Seattle/Tacoma Intl-BRU Brussels Bruxelles-National
12h 15m1 stop Reykjavik Keflavik Intl
$814Icelandair
Thu, Oct 8 - Sun, Oct 18
Icelandair Logo
1:50 pm - 8:40 pmBRU  Brussels Bruxelles-National-SEA Seattle/Tacoma Intl
15h 50m1 stop Reykjavik Keflavik Intl
Icelandair Logo
7:00 pm - 12:55 pmSEA  Seattle/Tacoma Intl-BRU Brussels Bruxelles-National
32h 55m1 stop Reykjavik Keflavik Intl
$819Icelandair
Thu, Oct 1 - Thu, Oct 15
Lufthansa Logo
6:20 am - 11:55 amBRU  Brussels Bruxelles-National-SEA Seattle/Tacoma Intl
14h 35m1 stop Frankfurt am Main
Lufthansa Logo
7:00 am - 9:00 amSEA  Seattle/Tacoma Intl-BRU Brussels Bruxelles-National
17h 00m1 stop Chicago O'Hare Intl
$849Lufthansa
Fri, Sep 11 - Fri, Sep 25
KLM Logo
8:05 am - 11:47 amBRU  Brussels Bruxelles-National-SEA Seattle/Tacoma Intl
12h 42m1 stop Amsterdam Schiphol
KLM Logo
10:35 am - 9:40 amSEA  Seattle/Tacoma Intl-BRU Brussels Bruxelles-National
14h 05m2 stops Portland Amsterdam Schiphol
$870KLM
Mon, Sep 21 - Mon, Sep 28
Lufthansa Logo
6:20 am - 11:55 amBRU  Brussels Bruxelles-National-SEA Seattle/Tacoma Intl
14h 35m1 stop Frankfurt am Main
Lufthansa Logo
8:25 am - 7:15 amSEA  Seattle/Tacoma Intl-BRU Brussels Bruxelles-National
13h 50m1 stop Washington, D.C. Dulles Intl
$874Lufthansa
Mon, Sep 21 - Mon, Sep 28
KLM Logo
6:20 am - 11:47 amBRU  Brussels Bruxelles-National-SEA Seattle/Tacoma Intl
14h 27m1 stop Amsterdam Schiphol
KLM Logo
1:45 pm - 2:40 pmSEA  Seattle/Tacoma Intl-BRU Brussels Bruxelles-National
15h 55m1 stop Amsterdam Schiphol
$888KLM
Tue, Sep 1 - Thu, Oct 1

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Scandinavian Airlines flights from Belgium to Seattle

Our best Scandinavian Airlines deals on Belgium to Seattle flight tickets
Scandinavian Airlines
Sep 25
BRU10:20 amBrussels Bruxelles-National
12h 25m
1 stop
SEA1:45 pmSeattle/Tacoma Intl
Oct 9
SEA3:55 pmSeattle/Tacoma Intl
18h 55m
1 stop
BRU7:50 pmBrussels Bruxelles-National
$764
Scandinavian Airlines
Sep 25
BRU10:20 amBrussels Bruxelles-National
12h 25m
1 stop
SEA1:45 pmSeattle/Tacoma Intl
Oct 9
SEA3:55 pmSeattle/Tacoma Intl
18h 55m
1 stop
BRU7:50 pmBrussels Bruxelles-National
$765
Scandinavian Airlines
Sep 11
BRU10:20 amBrussels Bruxelles-National
12h 25m
1 stop
SEA1:45 pmSeattle/Tacoma Intl
Sep 25
SEA3:55 pmSeattle/Tacoma Intl
18h 55m
1 stop
BRU7:50 pmBrussels Bruxelles-National
$776

United Airlines flights from Belgium to Seattle

Our best United Airlines deals on Belgium to Seattle flight tickets
United Airlines
Aug 17
BRU2:25 pmBrussels Bruxelles-National
18h 01m
2 stops
SEA11:26 pmSeattle/Tacoma Intl
Sep 3
SEA8:40 amSeattle/Tacoma Intl
15h 20m
2 stops
BRU9:00 amBrussels Bruxelles-National
$1,033
United Airlines
Aug 14
BRU6:20 amBrussels Bruxelles-National
18h 47m
2 stops
SEA4:07 pmSeattle/Tacoma Intl
Aug 28
SEA7:00 amSeattle/Tacoma Intl
17h 00m
1 stop
BRU9:00 amBrussels Bruxelles-National
$1,034
United Airlines
Aug 15
BRU10:30 amBrussels Bruxelles-National
19h 13m
2 stops
SEA8:43 pmSeattle/Tacoma Intl
Aug 29
SEA8:40 amSeattle/Tacoma Intl
19h 35m
3 stops
BRU1:15 pmBrussels Bruxelles-National
$1,174

momondo Fare Finder

 
Customize your flight search to find flights from Belgium to Seattle that fit within your specific budget. Explore options based on user searches and filter the results based on your desired price range. Find flights that match your budget for a cost-effective journey. Over the last 7 days, momondo users made 832,500 searches. Data last updated August 11, 2026.
Use the filters below to find and compare flights from Belgium to Seattle that are best for you.

Fly from

Fly to

Route

Depart

Return

Price

Cheapest round-trip

BrusselsSeattle

BRU Brussels Bruxelles-National - SEA Seattle/Tacoma Intl

BRUSEA

Brussels Bruxelles-National

Fri 9/11

8:55 pm-9:04 pm

3 stops33h 09m

Seattle/Tacoma Intl

Fri 9/25

7:00 pm-12:55 pm

1 stop32h 55m

$763

BrusselsSeattle

BRU Brussels Bruxelles-National - SEA Seattle/Tacoma Intl

BRUSEA

Brussels Bruxelles-National

Fri 9/25

10:20 am-1:45 pm

1 stop12h 25m

Seattle/Tacoma Intl

Fri 10/9

3:55 pm-7:50 pm

1 stop18h 55m

$764

BrusselsSeattle

BRU Brussels Bruxelles-National - SEA Seattle/Tacoma Intl

BRUSEA

Brussels Bruxelles-National

Fri 9/25

10:20 am-1:45 pm

1 stop12h 25m

Seattle/Tacoma Intl

Fri 10/9

3:55 pm-7:50 pm

1 stop18h 55m

$765

BrusselsSeattle

BRU Brussels Bruxelles-National - SEA Seattle/Tacoma Intl

BRUSEA

Brussels Bruxelles-National

Mon 10/5

9:10 pm-5:55 pm

3 stops29h 45m

Seattle/Tacoma Intl

Fri 10/9

3:40 pm-7:35 am

3 stops30h 55m

$794

BrusselsSeattle

BRU Brussels Bruxelles-National - SEA Seattle/Tacoma Intl

BRUSEA

Brussels Bruxelles-National

Thu 10/8

1:50 pm-8:40 pm

1 stop15h 50m

Seattle/Tacoma Intl

Sun 10/18

3:40 pm-12:55 pm

1 stop12h 15m

$814

BrusselsSeattle

BRU Brussels Bruxelles-National - SEA Seattle/Tacoma Intl

BRUSEA

Brussels Bruxelles-National

Thu 10/1

1:50 pm-8:40 pm

1 stop15h 50m

Seattle/Tacoma Intl

Thu 10/15

7:00 pm-12:55 pm

1 stop32h 55m

$819

BrusselsSeattle

BRU Brussels Bruxelles-National - SEA Seattle/Tacoma Intl

BRUSEA

Brussels Bruxelles-National

Fri 9/11

6:20 am-11:55 am

1 stop14h 35m

Seattle/Tacoma Intl

Fri 9/25

7:00 am-9:00 am

1 stop17h 00m

$849
Quickest round-trip

BrusselsSeattle

BRU Brussels Bruxelles-National - SEA Seattle/Tacoma Intl

BRUSEA

Brussels Bruxelles-National

Mon 9/21

8:05 am-11:47 am

1 stop12h 42m

Seattle/Tacoma Intl

Mon 9/28

10:35 am-9:40 am

2 stops14h 05m

$870

BrusselsSeattle

BRU Brussels Bruxelles-National - SEA Seattle/Tacoma Intl

BRUSEA

Brussels Bruxelles-National

Mon 9/21

6:20 am-11:55 am

1 stop14h 35m

Seattle/Tacoma Intl

Mon 9/28

8:25 am-7:15 am

1 stop13h 50m

$874

BrusselsSeattle

BRU Brussels Bruxelles-National - SEA Seattle/Tacoma Intl

BRUSEA

Brussels Bruxelles-National

Tue 9/1

6:20 am-11:47 am

1 stop14h 27m

Seattle/Tacoma Intl

Thu 10/1

1:45 pm-2:40 pm

1 stop15h 55m

$888

Flights are sorted by cheapest round-trip flights first.

Showing 1-10 of 20 resultsSorted by cheapest first
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See travel insights to Seattle from

How to get the cheapest flight ticket from Belgium to Seattle

Look no further. We've gone through all the searches for this route on momondo so you have the important information and insights to find the cheapest flight ticket for your trip

What is the cheapest month to fly to Seattle?

In general, October is the cheapest month to fly from Belgium to Seattle. Due to it being the ‘off-season’ during this time, you can expect flight prices to be around $747. If you don’t want to visit Seattle in October, then you should wait until May to fly from Belgium, when ticket prices are also cheap, with an average price of $769.

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

You are more likely to see cheaper flights to Seattle from Belgium when booking weeks ahead of your departure date. In general, you can expect to find flights to Seattle for around $913 when searching weeks out. However, flight prices might be lower outside of this timeframe. For example, people recently found flights to Seattle from Belgium for as low as $730 on momondo.

Cheap Belgium to Seattle flight deals and tips

Find info about flight duration, direct flights, and airports for your flight from Belgium to Seattle

Fastest flight time

12h 25m

Direct flights

None
The fastest flight from Belgium to Seattle takes 12h 25m
There are no direct flights from Belgium to Seattle. There are no popular flight routes from Belgium to Seattle.
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Frequently asked questions about flying from Belgium to Seattle

  • When did momondo last update prices for flights from Belgium to Seattle/Tacoma Intl Airport?

    Prices for flights from Belgium to Seattle/Tacoma Intl Airport are updated daily.

  • How many operators does momondo search for flights from Belgium to Seattle/Tacoma Intl Airport?

  • How old do you have to be to fly from Belgium to Seattle/Tacoma Intl Airport?

    The minimum age for a child to fly alone is five, but airlines that offer an unaccompanied minor (UNMR) service may have their own age limitations. Flight duration, scheduling, and layovers are among the considerations that may influence age limits. We recommend that you double-check with the airline you are booking with for travel from Belgium to Seattle/Tacoma Intl Airport.

  • What documentation or ID do you need to fly to Seattle/Tacoma Intl Airport?

    The travel and health documents you'll need for your trip to Seattle/Tacoma Intl Airport may differ based on your itinerary and personal situation. Typically, you should have several documents on hand, such as a national ID card or driver's license and a passport that is valid for six months after your intended arrival at Seattle/Tacoma Intl Airport. It is always advisable to seek advice from your airline or a trusted third party, such as IATA.

Best airlines flying from Belgium to Seattle

Compare and see reviews for airlines that fly from Belgium to Seattle with momondo
Airline
Rating
Free Cancellation
Price
IcelandairPriceFrom $529Free CancellationRating
6.9
728 reviews
Search Icelandair flights
United AirlinesPriceFrom $584Free CancellationRating
7.4
10,104 reviews
Search United Airlines flights
British AirwaysPriceFrom $586Free CancellationRating
6.7
8,159 reviews
Search British Airways flights
KLMPriceFrom $676Free CancellationRating
7.8
1,556 reviews
Search KLM flights
Scandinavian AirlinesPriceFrom $711Free CancellationRating
7.4
1,942 reviews
Search Scandinavian Airlines flights
LufthansaPriceFrom $823Free CancellationRating
6.8
8,180 reviews
Search Lufthansa flights

Traveling to a place near Seattle?

Book flights to Seattle if you plan to visit one of these locations
Tacoma
Leavenworth
SeaTac
Ocean Shores
Renton
Olympia
Kent
Lynnwood
Redmond
Lakewood
Federal Way
Puyallup
Tukwila
Fife
Cle Elum
Marysville
Kirkland
Centralia
Shoreline
Lacey

Why use momondo?

Why should I use momondo to find a flight deal from Belgium to Seattle?

Finding the right flight to Seattle from Belgium is quick and easy when you have a range of options in front of you, from reputable agents and recognisable airlines. Options that can then be filtered down to find the best fit. That is what momondo does. We make finding flights to Seattle quick and easy, saving you time and money.

Can I find flights from Belgium to Seattle with flexible booking policies on momondo?

Yes. momondo enables you to select and highlight flights to Seattle from Belgium with this policy.

How can momondo help me find flights from Belgium to Seattle?

momondo offers useful filters to help you find the right flight. Choose specific flight times, airports or even what payment method you prefer. We have numerous options to help you book your ideal flight from Belgium to Seattle.

I’m not ready to book a flight from Belgium to Seattle right now. Can momondo alert me if prices change?

If you are simply researching potential flights to Seattle, momondo offers a useful price alert feature which will track prices for flights to Seattle from Belgium and alert you when they change.

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