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Cheap flights from Seattle to Brussels from $211

This is the cheapest one-way flight price found by a momondo user in the last 72 hours by searching for a flight from Seattle to Brussels departing on 4/25. Fares may change, and may not be available for all flights or travel dates. Click the price to refresh the search for this deal.
1 adult
0 bags

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Find the cheapest flights from Seattle to Brussels

Cheap round-trip flights

Enter your travel dates to find the best prices.
Icelandair Logo
2:35 pm - 11:55 am
SEA
-
BRU
12h 20m1 stop
Icelandair Logo
12:50 pm - 5:00 pm
BRU
-
SEA
13h 10m1 stop
$388Icelandair
Thu, Jan 22 - Thu, Feb 5
United Airlines Logo
10:58 am - 8:55 am
SEA
-
BRU
12h 57m1 stop
United Airlines Logo
10:00 am - 7:03 pm
BRU
-
SEA
41h 03m2 stops
$438United Airlines
Tue, Feb 10 - Tue, Mar 10
Lufthansa Logo
10:55 am - 8:55 am
SEA
-
BRU
13h 00m1 stop
Lufthansa Logo
10:00 am - 7:16 pm
BRU
-
SEA
18h 16m2 stops
$442Lufthansa
Thu, Feb 19 - Thu, Feb 26
Lufthansa Logo
7:00 am - 8:55 am
SEA
-
BRU
16h 55m1 stop
Lufthansa Logo
10:10 am - 7:03 pm
BRU
-
SEA
16h 53m1 stop
$443Lufthansa
Tue, Feb 10 - Tue, Mar 10
Multiple Airlines Logo
5:50 am - 7:50 am
SEA
-
BRU
17h 00m2 stops
Multiple Airlines Logo
10:10 am - 6:14 pm
BRU
-
SEA
17h 04m1 stop
$446Multiple Airlines
Wed, Feb 4 - Wed, Feb 11
Air Canada Logo
8:00 pm - 7:50 am
SEA
-
BRU
26h 50m2 stops
Air Canada Logo
10:00 am - 9:31 am
BRU
-
SEA
31h 31m2 stops
$451Air Canada
Tue, Feb 10 - Tue, Mar 10
British Airways Logo
5:45 pm - 7:45 pm
SEA
-
BRU
17h 00m2 stops
British Airways Logo
5:30 pm - 5:55 pm
BRU
-
SEA
32h 25m1 stop
$452British Airways
Tue, Feb 10 - Tue, Mar 10
British Airways Logo
1:37 pm - 5:00 pm
SEA
-
BRU
18h 23m2 stops
British Airways Logo
11:00 am - 6:25 pm
BRU
-
SEA
16h 25m1 stop
$455British Airways
Tue, Mar 3 - Wed, Apr 1
British Airways Logo
7:15 am - 7:55 pm
SEA
-
BRU
27h 40m2 stops
British Airways Logo
3:00 pm - 4:55 pm
BRU
-
SEA
34h 55m1 stop
$456British Airways
Sun, Feb 22 - Mon, Mar 2
Lufthansa Logo
10:55 am - 8:55 am
SEA
-
BRU
13h 00m1 stop
Lufthansa Logo
10:10 am - 7:03 pm
BRU
-
SEA
17h 53m1 stop
$457Lufthansa
Thu, Feb 19 - Thu, Feb 26

Brussels Airlines flights from Seattle to Brussels Bruxelles-National Airport

Our best Brussels Airlines deals on Seattle to Brussels Bruxelles-National Airport flight tickets
Brussels Airlines
Apr 22
SEA8:00 amSeattle/Tacoma Intl
14h 15m
1 stop
BRU7:15 amBrussels Bruxelles-National
Apr 28
BRU12:00 pmBrussels Bruxelles-National
17h 53m
1 stop
SEA8:53 pmSeattle/Tacoma Intl
$422
Find similar
Brussels Airlines
Mar 11
SEA8:00 amSeattle/Tacoma Intl
15h 15m
1 stop
BRU7:15 amBrussels Bruxelles-National
Mar 18
BRU6:40 amBrussels Bruxelles-National
20h 23m
2 stops
SEA7:03 pmSeattle/Tacoma Intl
$469
Find similar
Brussels Airlines
Mar 11
SEA8:00 amSeattle/Tacoma Intl
15h 15m
1 stop
BRU7:15 amBrussels Bruxelles-National
Mar 18
BRU10:10 amBrussels Bruxelles-National
16h 53m
1 stop
SEA7:03 pmSeattle/Tacoma Intl
$471
Find similar

United Airlines flights from Seattle to Brussels Bruxelles-National Airport

Our best United Airlines deals on Seattle to Brussels Bruxelles-National Airport flight tickets
United Airlines
Feb 10
SEA10:58 amSeattle/Tacoma Intl
12h 57m
1 stop
BRU8:55 amBrussels Bruxelles-National
Mar 10
BRU10:00 amBrussels Bruxelles-National
41h 03m
2 stops
SEA7:03 pmSeattle/Tacoma Intl
$438
Find similar
United Airlines
Feb 20
SEA5:00 amSeattle/Tacoma Intl
23h 15m
2 stops
BRU1:15 pmBrussels Bruxelles-National
Feb 27
BRU10:10 amBrussels Bruxelles-National
21h 33m
1 stop
SEA10:43 pmSeattle/Tacoma Intl
$480
Find similar
United Airlines
Feb 10
SEA8:40 amSeattle/Tacoma Intl
19h 35m
3 stops
BRU1:15 pmBrussels Bruxelles-National
Mar 10
BRU10:00 amBrussels Bruxelles-National
33h 49m
2 stops
SEA11:49 amSeattle/Tacoma Intl
$485
Find similar

momondo Fare Finder

 
Customize your flight search to find flights from Seattle to Brussels Bruxelles-National Airport 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 January 7, 2026.
Use the filters below to find and compare flights from Seattle to Brussels Bruxelles-National Airport that are best for you.

Fly from

Fly to

Route

Depart

Return

Price

SeattleBrussels

SEA - BRU

SEABRU

Seattle/Tacoma Intl

Thu 1/22

2:35 pm-11:55 am

1 stop12h 20m

Brussels Bruxelles-National

Thu 2/5

12:50 pm-5:00 pm

1 stop13h 10m

$388

SeattleBrussels

SEA - BRU

SEABRU

Seattle/Tacoma Intl

Tue 2/10

10:58 am-8:55 am

1 stop12h 57m

Brussels Bruxelles-National

Tue 3/10

10:00 am-7:03 pm

2 stops41h 03m

$438

SeattleBrussels

SEA - BRU

SEABRU

Seattle/Tacoma Intl

Thu 2/19

10:55 am-8:55 am

1 stop13h 00m

Brussels Bruxelles-National

Thu 2/26

10:00 am-7:16 pm

2 stops18h 16m

$442

SeattleBrussels

SEA - BRU

SEABRU

Seattle/Tacoma Intl

Tue 2/10

7:00 am-8:55 am

1 stop16h 55m

Brussels Bruxelles-National

Tue 3/10

10:10 am-7:03 pm

1 stop16h 53m

$443

SeattleBrussels

SEA - BRU

SEABRU

Seattle/Tacoma Intl

Wed 2/4

5:50 am-7:50 am

2 stops17h 00m

Brussels Bruxelles-National

Wed 2/11

10:10 am-6:14 pm

1 stop17h 04m

$446

SeattleBrussels

SEA - BRU

SEABRU

Seattle/Tacoma Intl

Tue 2/10

8:00 pm-7:50 am

2 stops26h 50m

Brussels Bruxelles-National

Tue 3/10

10:00 am-9:31 am

2 stops31h 31m

$451

SeattleBrussels

SEA - BRU

SEABRU

Seattle/Tacoma Intl

Tue 2/10

5:45 pm-7:45 pm

2 stops17h 00m

Brussels Bruxelles-National

Tue 3/10

5:30 pm-5:55 pm

1 stop32h 25m

$452

SeattleBrussels

SEA - BRU

SEABRU

Seattle/Tacoma Intl

Tue 3/3

1:37 pm-5:00 pm

2 stops18h 23m

Brussels Bruxelles-National

Wed 4/1

11:00 am-6:25 pm

1 stop16h 25m

$455

SeattleBrussels

SEA - BRU

SEABRU

Seattle/Tacoma Intl

Sun 2/22

7:15 am-7:55 pm

2 stops27h 40m

Brussels Bruxelles-National

Mon 3/2

3:00 pm-4:55 pm

1 stop34h 55m

$456

SeattleBrussels

SEA - BRU

SEABRU

Seattle/Tacoma Intl

Thu 2/19

10:55 am-8:55 am

1 stop13h 00m

Brussels Bruxelles-National

Thu 2/26

10:10 am-7:03 pm

1 stop17h 53m

$457

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 Brussels from

How to get the cheapest flight ticket from Seattle to Brussels Bruxelles-National Airport

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 Brussels Bruxelles-National Airport?

The cheapest month to fly to Brussels Bruxelles-National Airport from Seattle is in January. Flight prices, which tend to average around $463, are often lower during this time because this is during the off-season. If you aren’t able to travel during the month of January, then book flights to Brussels Bruxelles-National Airport from Seattle during October instead. Flights to Brussels Bruxelles-National Airport in October, while not as cheap as those in January, still average around $476.

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

You are more likely to see cheaper flights to Brussels Bruxelles-National Airport from Seattle when booking weeks ahead of your departure date. In general, you can expect to find flights to Brussels Bruxelles-National Airport for around $616 when searching weeks out. However, flight prices might be lower outside of this timeframe. For example, people recently found flights to Brussels Bruxelles-National Airport from Seattle for as low as $542 on momondo.

Can stopping save me money on Seattle to Brussels Bruxelles-National Airport flights?

You could potentially save up to 17% on your flight if you consider stops on a Seattle to Brussels Bruxelles-National Airport flight.

How have Seattle to Brussels Bruxelles-National Airport flight prices changed over time?

As of January 2026, prices for Seattle to Brussels Bruxelles-National Airport flights are approximately 7% cheaper when compared to flights at the same time last year.

When to book flights from Seattle to Brussels Bruxelles-National Airport

Are you open to changing your travel dates? Check out the ideal times to fly from Seattle to Brussels Bruxelles-National Airport according to our flight data. Find out which month and days have the cheapest flights.
Estimated round-trip price

Cheap Seattle to Brussels Bruxelles-National Airport (SEA to BRU) flight deals and tips

Find info about flight duration, direct flights, and airports for your flight from Seattle to Brussels Bruxelles-National Airport

Fastest flight time

12h 15m

Direct flights

None
The fastest flight from Seattle to Brussels Bruxelles-National Airport takes 12h 15m
There are no direct flights from Seattle to Brussels Bruxelles-National Airport. There are no popular flight routes from Seattle to Brussels Bruxelles-National Airport.
Search flight deals

  • How far is Seattle/Tacoma Intl to Brussels Bruxelles-National by plane?

    The straight-line distance from Seattle/Tacoma Intl to Brussels Bruxelles-National is 4932.2 mi. Typically, this will take 12h 15m by plane in normal conditions.

  • When did momondo last update prices for flights from Seattle/Tacoma Intl Airport to Brussels Bruxelles-National Airport?

    Prices for flights from Seattle/Tacoma Intl Airport to Brussels Bruxelles-National Airport refresh daily.

  • How many operators does momondo search for flights from Seattle/Tacoma Intl Airport to Brussels Bruxelles-National Airport?

  • How old do you have to be to fly from Seattle/Tacoma Intl Airport to Brussels Bruxelles-National Airport?

    The minimum age a child must be to fly alone is five but airlines that offer an unaccompanied minor (UNMR) service will have their own age restrictions, including rules around flight length, timings, and stopovers. We always recommend checking with the individual airline you are booking with to travel from Seattle/Tacoma Intl Airport to Brussels Bruxelles-National Airport.

  • What documentation or ID do you need to fly to Brussels Bruxelles-National Airport?

    The travel and health documents required for your trip to Brussels Bruxelles-National Airport can vary based on your itinerary and personal situation. As a rule, consider having multiple documents such as a national ID card or driver’s license, and a passport valid for six-months after you plan to arrive at Brussels Bruxelles-National Airport. We always recommend checking with your airline or a trusted third party such as IATA to get advice.

  • What is the most popular airline from Seattle to Brussels Bruxelles-National Airport?

Best airlines flying from Seattle to Brussels Bruxelles-National Airport

Compare and see reviews for airlines that fly from Seattle to Brussels Bruxelles-National Airport with momondo
Airline
Rating
Free Cancellation
Price
IcelandairPriceFrom $386Free CancellationRating
7.1
593 reviews
Search Icelandair flights
DeltaPriceFrom $482Free CancellationRating
7.9
8,025 reviews
Search Delta flights
United AirlinesPriceFrom $483Free CancellationRating
7.4
9,139 reviews
Search United Airlines flights
British AirwaysPriceFrom $485Free CancellationRating
6.7
7,657 reviews
Search British Airways flights
Virgin AtlanticPriceFrom $488Free CancellationRating
7.5
678 reviews
Search Virgin Atlantic flights
LufthansaPriceFrom $501Free CancellationRating
6.8
7,692 reviews
Search Lufthansa flights
Air FrancePriceFrom $506Free CancellationRating
7.4
1,519 reviews
Search Air France flights
KLMPriceFrom $511Free CancellationRating
7.7
1,434 reviews
Search KLM flights
Air CanadaPriceFrom $518Free CancellationRating
7.1
10,604 reviews
Search Air Canada flights
Aer LingusPriceFrom $532Free CancellationRating
7.2
1,427 reviews
Search Aer Lingus flights

Traveling to a place near Brussels?

Book flights to Brussels if you plan to visit one of these locations
Ghent
Bruges
Leuven
Charleroi
Hasselt
Spa
Zaventem
Namur
Dinant
Genk
Mons
Waterloo
Durbuy
Aalst
Mechelen
Francorchamps
Knokke-Heist
Tournai
Oostkamp
Halle

Why use momondo?

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

momondo compares prices from hundreds of airlines and agents so you can find and book the best deal on flights from Seattle to Brussels. Millions of users trust and use momondo every year so you are in good hands.

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

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

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

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 Seattle to Brussels.

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

Yes. momondo can track prices for Seattle to Brussels flights and alert you when they change. Perform a search to set up the price alert. All that is required is a valid email address.

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