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Cheap flights from Belgium to Seattle from $491

This is the cheapest round-trip flight price found by a momondo user in the last 72 hours by searching for a flight from Belgium to Seattle departing on 9/25. Fares may change, and may not be available for all flights or travel dates. Click the price to refresh the search for this deal.
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0 bags

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Find the cheapest flights from Belgium to Seattle

Recent round-trip flight deals from Belgium to Seattle

Icelandair Logo
1:50 pm - 8:40 pmBRU-SEA
15h 50m1 stop
Icelandair Logo
7:00 pm - 12:50 pmSEA-BRU
32h 50m1 stop
$491Icelandair
Find Deal
Thu, Sep 25 - Wed, Oct 8
Icelandair Logo
1:50 pm - 8:40 pmBRU-SEA
15h 50m1 stop
Icelandair Logo
3:45 pm - 12:50 pmSEA-BRU
12h 05m1 stop
$498Icelandair
Find Deal
Thu, Sep 4 - Sun, Sep 28
British Airways Logo
2:50 pm - 6:20 pmBRU-SEA
12h 30m1 stop
British Airways Logo
2:52 pm - 8:25 pmSEA-BRU
20h 33m2 stops
$503British Airways
Find Deal
Thu, Sep 25 - Wed, Oct 8
Icelandair Logo
12:50 pm - 5:00 pmBRU-SEA
13h 10m1 stop
Icelandair Logo
2:35 pm - 11:55 amSEA-BRU
12h 20m1 stop
$509Icelandair
Find Deal
Fri, Nov 14 - Sat, Dec 13
Icelandair Logo
12:50 pm - 5:00 pmBRU-SEA
13h 10m1 stop
Icelandair Logo
2:35 pm - 11:55 amSEA-BRU
12h 20m1 stop
$511Icelandair
Find Deal
Thu, Nov 13 - Sat, Dec 13
British Airways Logo
8:25 pm - 11:35 amBRU-SEA
24h 10m1 stop
British Airways Logo
11:42 am - 1:40 pmSEA-BRU
16h 58m2 stops
$527British Airways
Find Deal
Tue, Oct 14 - Fri, Nov 14
United Airlines Logo
7:00 am - 12:10 pmBRU-SEA
14h 10m1 stop
United Airlines Logo
7:00 am - 8:05 amSEA-BRU
16h 05m1 stop
$572United Airlines
Find Deal
Fri, Nov 14 - Sun, Dec 14
Lufthansa Logo
7:00 am - 11:55 amBRU-SEA
13h 55m1 stop
Lufthansa Logo
7:15 pm - 8:05 amSEA-BRU
27h 50m2 stops
$576Lufthansa
Find Deal
Wed, Aug 27 - Wed, Sep 10
Finnair Logo
11:40 am - 9:58 pmBRU-SEA
19h 18m2 stops
Finnair Logo
1:30 pm - 6:20 pmSEA-BRU
19h 50m2 stops
$577Finnair
Find Deal
Thu, Sep 25 - Wed, Oct 8
United Airlines Logo
10:30 am - 10:59 pmBRU-SEA
21h 29m2 stops
United Airlines Logo
7:00 am - 7:45 amSEA-BRU
15h 45m2 stops
$579United Airlines
Find Deal
Sat, Aug 23 - Sat, Sep 6

British Airways flights from Belgium to Seattle

Our best British Airways deals on Belgium to Seattle flight tickets
British Airways
Sep 25
BRU2:50 pmBrussels Bruxelles-National
12h 30m
1 stop
SEA6:20 pmSeattle/Tacoma Intl
Oct 8
SEA2:52 pmSeattle/Tacoma Intl
20h 33m
2 stops
BRU8:25 pmBrussels Bruxelles-National
$503
Find similar
British Airways
Oct 14
BRU8:25 pmBrussels Bruxelles-National
24h 10m
1 stop
SEA11:35 amSeattle/Tacoma Intl
Nov 14
SEA11:42 amSeattle/Tacoma Intl
16h 58m
2 stops
BRU1:40 pmBrussels Bruxelles-National
$527
Find similar
British Airways
Sep 25
BRU2:50 pmBrussels Bruxelles-National
12h 30m
1 stop
SEA6:20 pmSeattle/Tacoma Intl
Oct 8
SEA10:32 amSeattle/Tacoma Intl
18h 33m
2 stops
BRU2:05 pmBrussels Bruxelles-National
$529
Find similar

American Airlines flights from Belgium to Seattle

Our best American Airlines deals on Belgium to Seattle flight tickets
American Airlines
Sep 25
BRU10:50 amBrussels Bruxelles-National
16h 30m
1 stop
SEA6:20 pmSeattle/Tacoma Intl
Oct 8
SEA10:39 amSeattle/Tacoma Intl
18h 26m
2 stops
BRU2:05 pmBrussels Bruxelles-National
$534
Find similar
American Airlines
Aug 28
BRU10:50 amBrussels Bruxelles-National
16h 30m
1 stop
SEA6:20 pmSeattle/Tacoma Intl
Sep 8
SEA10:09 amSeattle/Tacoma Intl
19h 11m
2 stops
BRU2:20 pmBrussels Bruxelles-National
$537
Find similar
American Airlines
Sep 18
BRU2:50 pmBrussels Bruxelles-National
29h 45m
1 stop
SEA11:35 amSeattle/Tacoma Intl
Oct 1
SEA1:02 pmSeattle/Tacoma Intl
17h 18m
2 stops
BRU3:20 pmBrussels Bruxelles-National
$541
Find similar

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 5, 2025.
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

BrusselsSeattle

BRU - SEA

BRUSEA

Brussels Bruxelles-National

Thu 9/25

1:50 pm-8:40 pm

1 stop15h 50m

Seattle/Tacoma Intl

Wed 10/8

7:00 pm-12:50 pm

1 stop32h 50m

$491

BrusselsSeattle

BRU - SEA

BRUSEA

Brussels Bruxelles-National

Thu 9/4

1:50 pm-8:40 pm

1 stop15h 50m

Seattle/Tacoma Intl

Sun 9/28

3:45 pm-12:50 pm

1 stop12h 05m

$498

BrusselsSeattle

BRU - SEA

BRUSEA

Brussels Bruxelles-National

Thu 9/25

2:50 pm-6:20 pm

1 stop12h 30m

Seattle/Tacoma Intl

Wed 10/8

2:52 pm-8:25 pm

2 stops20h 33m

$503

BrusselsSeattle

BRU - SEA

BRUSEA

Brussels Bruxelles-National

Fri 11/14

12:50 pm-5:00 pm

1 stop13h 10m

Seattle/Tacoma Intl

Sat 12/13

2:35 pm-11:55 am

1 stop12h 20m

$509

BrusselsSeattle

BRU - SEA

BRUSEA

Brussels Bruxelles-National

Thu 11/13

12:50 pm-5:00 pm

1 stop13h 10m

Seattle/Tacoma Intl

Sat 12/13

2:35 pm-11:55 am

1 stop12h 20m

$511

BrusselsSeattle

BRU - SEA

BRUSEA

Brussels Bruxelles-National

Tue 10/14

8:25 pm-11:35 am

1 stop24h 10m

Seattle/Tacoma Intl

Fri 11/14

11:42 am-1:40 pm

2 stops16h 58m

$527

BrusselsSeattle

BRU - SEA

BRUSEA

Brussels Bruxelles-National

Fri 11/14

7:00 am-12:10 pm

1 stop14h 10m

Seattle/Tacoma Intl

Sun 12/14

7:00 am-8:05 am

1 stop16h 05m

$572

BrusselsSeattle

BRU - SEA

BRUSEA

Brussels Bruxelles-National

Wed 8/27

7:00 am-11:55 am

1 stop13h 55m

Seattle/Tacoma Intl

Wed 9/10

7:15 pm-8:05 am

2 stops27h 50m

$576

BrusselsSeattle

BRU - SEA

BRUSEA

Brussels Bruxelles-National

Thu 9/25

11:40 am-9:58 pm

2 stops19h 18m

Seattle/Tacoma Intl

Wed 10/8

1:30 pm-6:20 pm

2 stops19h 50m

$577

BrusselsSeattle

BRU - SEA

BRUSEA

Brussels Bruxelles-National

Sat 8/23

10:30 am-10:59 pm

2 stops21h 29m

Seattle/Tacoma Intl

Sat 9/6

7:00 am-7:45 am

2 stops15h 45m

$579

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, December 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 $592. If you don’t want to visit Seattle in December, then you should wait until January to fly from Belgium, when ticket prices are also cheap, with an average price of $640.

What is the cheapest day to depart on your flight to Seattle?

On average, the least expensive day to fly to Seattle from Belgium is on a Sunday. momondo users have found tickets for Sunday departures for as low as $696. However, this price may fluctuate depending on the airline, the season, and holidays. On the other hand, Monday is the most expensive day to depart from Belgium because it is more convenient for both business and leisure travelers. As a result, prices tend to be around $979.

What is the cheapest time of day to depart on your flight to Seattle?

Flying to Seattle from Belgium in the morning is the least expensive time of day to depart. momondo users have found prices as low as $809 when looking at flights departing in the morning. Flights to Seattle are more costly at noon, with an average ticket price of $956. Departure times at noon fall within the peak daily travel times, which is why tickets can be more expensive.

How far in advance should I book a flight 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 $711 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 $637 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

Best Price Found

$586

Fastest flight time

12h 25m

Direct flights

None

Airports in Seattle

1 airport
The best one-way flight to Seattle from Belgium in the past 72 hours is $586. The best round-trip flight deal from Belgium to Seattle found on momondo in the last 72 hours is $491.
The fastest flight from Belgium to Seattle takes 12h 25m
There are no direct flights from Belgium to Seattle. Popular non-direct route for this connection is Brussels Bruxelles-National Airport - Seattle/Tacoma Intl Airport.
There is 1 airport near Seattle: Seattle/Tacoma Intl (SEA)
Search flight deals

  • 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
Aer LingusPriceFrom $524Free CancellationRating
7.1
1,197 reviews
Search Aer Lingus flights
British AirwaysPriceFrom $592Free CancellationRating
6.6
7,237 reviews
Search British Airways flights
IcelandairPriceFrom $601Free CancellationRating
7.0
524 reviews
Search Icelandair flights
United AirlinesPriceFrom $604Free CancellationRating
7.4
8,916 reviews
Search United Airlines flights
KLMPriceFrom $605Free CancellationRating
7.8
1,381 reviews
Search KLM flights
DeltaPriceFrom $616Free CancellationRating
8.0
7,985 reviews
Search Delta flights
LufthansaPriceFrom $631Free CancellationRating
6.8
7,287 reviews
Search Lufthansa flights
FinnairPriceFrom $651Free CancellationRating
7.6
1,319 reviews
Search Finnair flights

Traveling to a place near Seattle?

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

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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