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Cheap flights from Seattle to Brussels from $333

1 adult
1 adult, Economy, 0 bags

Discover deals from 900+ travel sites with momondo.

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 amSEA  Seattle/Tacoma Intl-BRU Brussels Bruxelles-National
12h 20m1 stop Reykjavik Keflavik Intl
Icelandair Logo
12:50 pm - 5:00 pmBRU  Brussels Bruxelles-National-SEA Seattle/Tacoma Intl
13h 10m1 stop Reykjavik Keflavik Intl
$567Icelandair
Mon, Nov 23 - Tue, Dec 8
Icelandair Logo
2:35 pm - 11:55 amSEA  Seattle/Tacoma Intl-BRU Brussels Bruxelles-National
12h 20m1 stop Reykjavik Keflavik Intl
Icelandair Logo
12:50 pm - 5:00 pmBRU  Brussels Bruxelles-National-SEA Seattle/Tacoma Intl
13h 10m1 stop Reykjavik Keflavik Intl
$569Icelandair
Mon, Nov 23 - Tue, Dec 8
Air Canada Logo
3:15 pm - 8:55 amSEA  Seattle/Tacoma Intl-BRU Brussels Bruxelles-National
32h 40m2 stops Vancouver Intl London Heathrow
Air Canada Logo
7:00 am - 2:15 pmBRU  Brussels Bruxelles-National-SEA Seattle/Tacoma Intl
16h 15m2 stops Frankfurt am Main Vancouver Intl
$698Air Canada
Sun, Apr 18 - Fri, May 7
Multiple Airlines Logo
2:50 pm - 10:50 amSEA  Seattle/Tacoma Intl-BRU Brussels Bruxelles-National
35h 00m3 stops Munich Franz Josef Strauss Stockholm Arlanda Oslo Gardermoen
Multiple Airlines Logo
7:20 pm - 8:59 pmBRU  Brussels Bruxelles-National-SEA Seattle/Tacoma Intl
34h 39m3 stops Stockholm Arlanda Frankfurt am Main Toronto Pearson Intl
$705Multiple Airlines
Sun, Nov 29 - Fri, Dec 4
Lufthansa Logo
6:50 pm - 5:25 pmSEA  Seattle/Tacoma Intl-BRU Brussels Bruxelles-National
13h 35m1 stop Munich Franz Josef Strauss
Lufthansa Logo
7:00 am - 2:15 pmBRU  Brussels Bruxelles-National-SEA Seattle/Tacoma Intl
16h 15m2 stops Frankfurt am Main Vancouver Intl
$707Lufthansa
Sun, Apr 18 - Fri, May 7
Lufthansa Logo
6:50 pm - 11:00 pmSEA  Seattle/Tacoma Intl-BRU Brussels Bruxelles-National
19h 10m1 stop Munich Franz Josef Strauss
Lufthansa Logo
7:00 am - 12:20 pmBRU  Brussels Bruxelles-National-SEA Seattle/Tacoma Intl
14h 20m1 stop Frankfurt am Main
$737Lufthansa
Sun, Apr 18 - Fri, May 7
United Airlines Logo
3:15 pm - 8:00 pmSEA  Seattle/Tacoma Intl-BRU Brussels Bruxelles-National
19h 45m2 stops Vancouver Intl London Heathrow
United Airlines Logo
7:00 am - 12:20 pmBRU  Brussels Bruxelles-National-SEA Seattle/Tacoma Intl
14h 20m1 stop Frankfurt am Main
$738United Airlines
Sun, Apr 18 - Thu, Apr 22
United Airlines Logo
3:15 pm - 8:00 pmSEA  Seattle/Tacoma Intl-BRU Brussels Bruxelles-National
19h 45m2 stops Vancouver Intl London Heathrow
United Airlines Logo
7:00 am - 12:20 pmBRU  Brussels Bruxelles-National-SEA Seattle/Tacoma Intl
14h 20m1 stop Frankfurt am Main
$747United Airlines
Sun, Apr 18 - Thu, Apr 22
British Airways Logo
8:20 pm - 8:25 pmSEA  Seattle/Tacoma Intl-BRU Brussels Bruxelles-National
15h 05m1 stop London Heathrow
British Airways Logo
8:50 pm - 11:35 amBRU  Brussels Bruxelles-National-SEA Seattle/Tacoma Intl
23h 45m1 stop London Heathrow
$765British Airways
Tue, Apr 6 - Mon, Apr 19
British Airways Logo
11:16 am - 3:15 pmSEA  Seattle/Tacoma Intl-BRU Brussels Bruxelles-National
18h 59m2 stops Chicago O'Hare Intl London Heathrow
British Airways Logo
8:50 pm - 11:35 amBRU  Brussels Bruxelles-National-SEA Seattle/Tacoma Intl
23h 45m1 stop London Heathrow
$769British Airways
Tue, Apr 6 - Mon, Apr 19

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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
Apr 18
SEA3:15 pmSeattle/Tacoma Intl
19h 45m
2 stops
BRU8:00 pmBrussels Bruxelles-National
Apr 22
BRU7:00 amBrussels Bruxelles-National
14h 20m
1 stop
SEA12:20 pmSeattle/Tacoma Intl
$738
United Airlines
Apr 18
SEA10:10 amSeattle/Tacoma Intl
24h 50m
2 stops
BRU8:00 pmBrussels Bruxelles-National
Apr 22
BRU8:35 amBrussels Bruxelles-National
12h 45m
1 stop
SEA12:20 pmSeattle/Tacoma Intl
$748
United Airlines
Apr 18
SEA10:10 amSeattle/Tacoma Intl
37h 45m
2 stops
BRU8:55 amBrussels Bruxelles-National
Apr 22
BRU9:55 amBrussels Bruxelles-National
19h 53m
1 stop
SEA8:48 pmSeattle/Tacoma Intl
$749

Lufthansa flights from Seattle to Brussels Bruxelles-National Airport

Our best Lufthansa deals on Seattle to Brussels Bruxelles-National Airport flight tickets
Lufthansa
Apr 18
SEA6:50 pmSeattle/Tacoma Intl
13h 35m
1 stop
BRU5:25 pmBrussels Bruxelles-National
May 7
BRU7:00 amBrussels Bruxelles-National
16h 15m
2 stops
SEA2:15 pmSeattle/Tacoma Intl
$707
Lufthansa
Apr 18
SEA6:50 pmSeattle/Tacoma Intl
19h 10m
1 stop
BRU11:00 pmBrussels Bruxelles-National
May 7
BRU7:00 amBrussels Bruxelles-National
14h 20m
1 stop
SEA12:20 pmSeattle/Tacoma Intl
$737
Lufthansa
Apr 10
SEA3:15 pmSeattle/Tacoma Intl
30h 55m
2 stops
BRU7:10 amBrussels Bruxelles-National
Apr 18
BRU10:35 amBrussels Bruxelles-National
20h 23m
2 stops
SEA9:58 pmSeattle/Tacoma Intl
$786

momondo Fare Finder

 
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

Cheapest round-trip
Quickest round-trip

SeattleBrussels

SEA Seattle/Tacoma Intl - BRU Brussels Bruxelles-National

SEABRU

Seattle/Tacoma Intl

Mon 11/23

2:35 pm-11:55 am

1 stop12h 20m

Brussels Bruxelles-National

Tue 12/8

12:50 pm-5:00 pm

1 stop13h 10m

$567

SeattleBrussels

SEA Seattle/Tacoma Intl - BRU Brussels Bruxelles-National

SEABRU

Seattle/Tacoma Intl

Mon 11/23

2:35 pm-11:55 am

1 stop12h 20m

Brussels Bruxelles-National

Tue 12/8

12:50 pm-5:00 pm

1 stop13h 10m

$569

SeattleBrussels

SEA Seattle/Tacoma Intl - BRU Brussels Bruxelles-National

SEABRU

Seattle/Tacoma Intl

Sun 4/18

3:15 pm-8:55 am

2 stops32h 40m

Brussels Bruxelles-National

Fri 5/7

7:00 am-2:15 pm

2 stops16h 15m

$698

SeattleBrussels

SEA Seattle/Tacoma Intl - BRU Brussels Bruxelles-National

SEABRU

Seattle/Tacoma Intl

Sun 11/29

2:50 pm-10:50 am

3 stops35h 00m

Brussels Bruxelles-National

Fri 12/4

7:20 pm-8:59 pm

3 stops34h 39m

$705

SeattleBrussels

SEA Seattle/Tacoma Intl - BRU Brussels Bruxelles-National

SEABRU

Seattle/Tacoma Intl

Sun 4/18

6:50 pm-5:25 pm

1 stop13h 35m

Brussels Bruxelles-National

Fri 5/7

7:00 am-2:15 pm

2 stops16h 15m

$707

SeattleBrussels

SEA Seattle/Tacoma Intl - BRU Brussels Bruxelles-National

SEABRU

Seattle/Tacoma Intl

Sun 4/18

6:50 pm-11:00 pm

1 stop19h 10m

Brussels Bruxelles-National

Fri 5/7

7:00 am-12:20 pm

1 stop14h 20m

$737

SeattleBrussels

SEA Seattle/Tacoma Intl - BRU Brussels Bruxelles-National

SEABRU

Seattle/Tacoma Intl

Sun 4/18

3:15 pm-8:00 pm

2 stops19h 45m

Brussels Bruxelles-National

Thu 4/22

7:00 am-12:20 pm

1 stop14h 20m

$738

SeattleBrussels

SEA Seattle/Tacoma Intl - BRU Brussels Bruxelles-National

SEABRU

Seattle/Tacoma Intl

Sun 4/18

3:15 pm-8:00 pm

2 stops19h 45m

Brussels Bruxelles-National

Thu 4/22

7:00 am-12:20 pm

1 stop14h 20m

$747

SeattleBrussels

SEA Seattle/Tacoma Intl - BRU Brussels Bruxelles-National

SEABRU

Seattle/Tacoma Intl

Tue 4/6

8:20 pm-8:25 pm

1 stop15h 05m

Brussels Bruxelles-National

Mon 4/19

8:50 pm-11:35 am

1 stop23h 45m

$765

SeattleBrussels

SEA Seattle/Tacoma Intl - BRU Brussels Bruxelles-National

SEABRU

Seattle/Tacoma Intl

Tue 4/6

11:16 am-3:15 pm

2 stops18h 59m

Brussels Bruxelles-National

Mon 4/19

8:50 pm-11:35 am

1 stop23h 45m

$769

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 typical price of a round-trip flight between Seattle and Brussels Bruxelles-National Airport?

Prices are currently low for flights on this route.

Typical prices usually range from $615 to $758.
The lowest price recently found on this route was $567.

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 February. Flight prices, which tend to average around $510, are often lower during this time because this is during the off-season. If you aren’t able to travel during the month of February, then book flights to Brussels Bruxelles-National Airport from Seattle during January instead. Flights to Brussels Bruxelles-National Airport in January, while not as cheap as those in February, still average around $522.

How far in advance should I book a flight from Seattle 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 $772 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 $562 on momondo.

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

You could potentially save up to 3% 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 October 2026, prices for Seattle to Brussels Bruxelles-National Airport flights are approximately 44% 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

Best Price Found

$333

Fastest flight time

12h 20m

Direct flights

None
The best one-way flight to Brussels Bruxelles-National Airport from Seattle in the past 72 hours is $333. The best round-trip flight deal from Seattle to Brussels Bruxelles-National Airport found on momondo in the last 72 hours is $567.
The fastest flight from Seattle to Brussels Bruxelles-National Airport takes 12h 20m
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

Frequently asked questions about flying from Seattle to Brussels Bruxelles-National Airport

  • 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 20m 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 $393Free CancellationRating
6.9
764 reviews
Search Icelandair flights
British AirwaysPriceFrom $421Free CancellationRating
6.7
8,277 reviews
Search British Airways flights
KLMPriceFrom $481Free CancellationRating
7.8
1,595 reviews
Search KLM flights
LufthansaPriceFrom $496Free CancellationRating
6.8
8,299 reviews
Search Lufthansa flights
DeltaPriceFrom $509Free CancellationRating
7.8
8,698 reviews
Search Delta flights
United AirlinesPriceFrom $522Free CancellationRating
7.3
10,459 reviews
Search United Airlines flights

Traveling to a place near Brussels?

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