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Cheap flights from Seattle to Brussels from $202

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 5/17. 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 20m
1 stop
Icelandair Logo
12:50 pm - 5:00 pm
BRU
-
SEA
13h 10m
1 stop
$394Icelandair
Wed, Feb 25 - Thu, Mar 5
Icelandair Logo
3:40 pm - 12:55 pm
SEA
-
BRU
12h 15m
1 stop
Icelandair Logo
1:50 pm - 8:40 pm
BRU
-
SEA
15h 50m
1 stop
$405Icelandair
Thu, May 7 - Fri, May 15
Icelandair Logo
7:00 pm - 12:55 pm
SEA
-
BRU
32h 55m
1 stop
Icelandair Logo
1:50 pm - 5:55 pm
BRU
-
SEA
13h 05m
1 stop
$406Icelandair
Fri, May 1 - Sun, May 10
Icelandair Logo
2:35 pm - 11:55 am
SEA
-
BRU
12h 20m
1 stop
Icelandair Logo
12:50 pm - 5:00 pm
BRU
-
SEA
13h 10m
1 stop
$415Icelandair
Wed, Feb 25 - Fri, Mar 6
Icelandair Logo
3:40 pm - 12:55 pm
SEA
-
BRU
12h 15m
1 stop
Icelandair Logo
1:50 pm - 8:40 pm
BRU
-
SEA
15h 50m
1 stop
$416Icelandair
Sun, Mar 29 - Mon, Apr 13
Icelandair Logo
3:40 pm - 12:55 pm
SEA
-
BRU
12h 15m
1 stop
Icelandair Logo
1:50 pm - 5:55 pm
BRU
-
SEA
13h 05m
1 stop
$429Icelandair
Sat, May 9 - Fri, May 22
Icelandair Logo
3:40 pm - 12:55 pm
SEA
-
BRU
12h 15m
1 stop
Icelandair Logo
1:50 pm - 5:55 pm
BRU
-
SEA
13h 05m
1 stop
$437Icelandair
Fri, May 8 - Fri, May 22
United Airlines Logo
10:58 am - 8:55 am
SEA
-
BRU
12h 57m
1 stop
United Airlines Logo
10:00 am - 8:56 pm
BRU
-
SEA
42h 56m
2 stops
$438United Airlines
Tue, Feb 10 - Tue, Mar 10
Air Canada Logo
9:55 am - 7:50 am
SEA
-
BRU
36h 55m
2 stops
Air Canada Logo
10:00 am - 7:16 pm
BRU
-
SEA
41h 16m
2 stops
$450Air Canada
Tue, Feb 10 - Tue, Mar 10
British Airways Logo
5:45 pm - 7:45 pm
SEA
-
BRU
17h 00m
2 stops
British Airways Logo
5:30 pm - 5:55 pm
BRU
-
SEA
32h 25m
1 stop
$451British Airways
Tue, Feb 10 - Tue, Mar 10

Icelandair flights from Seattle to Brussels Bruxelles-National Airport

Our best Icelandair deals on Seattle to Brussels Bruxelles-National Airport flight tickets
Icelandair
Feb 25
SEA2:35 pmSeattle/Tacoma Intl
12h 20m
1 stop
BRU11:55 amBrussels Bruxelles-National
Mar 5
BRU12:50 pmBrussels Bruxelles-National
13h 10m
1 stop
SEA5:00 pmSeattle/Tacoma Intl
$394
Icelandair
May 7
SEA3:40 pmSeattle/Tacoma Intl
12h 15m
1 stop
BRU12:55 pmBrussels Bruxelles-National
May 15
BRU1:50 pmBrussels Bruxelles-National
15h 50m
1 stop
SEA8:40 pmSeattle/Tacoma Intl
$405
Icelandair
May 1
SEA7:00 pmSeattle/Tacoma Intl
32h 55m
1 stop
BRU12:55 pmBrussels Bruxelles-National
May 10
BRU1:50 pmBrussels Bruxelles-National
13h 05m
1 stop
SEA5:55 pmSeattle/Tacoma Intl
$406

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
42h 56m
2 stops
SEA8:56 pmSeattle/Tacoma Intl
$438
United Airlines
Jan 26
SEA2:10 pmSeattle/Tacoma Intl
33h 45m
1 stop
BRU8:55 amBrussels Bruxelles-National
Feb 10
BRU11:15 amBrussels Bruxelles-National
32h 52m
1 stop
SEA11:07 amSeattle/Tacoma Intl
$449
United Airlines
Mar 3
SEA8:17 amSeattle/Tacoma Intl
13h 58m
1 stop
BRU7:15 amBrussels Bruxelles-National
Apr 1
BRU12:00 pmBrussels Bruxelles-National
17h 53m
1 stop
SEA8:53 pmSeattle/Tacoma Intl
$457

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 20, 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

Wed 2/25

2:35 pm-11:55 am

1 stop12h 20m

Brussels Bruxelles-National

Thu 3/5

12:50 pm-5:00 pm

1 stop13h 10m

$394

SeattleBrussels

SEA - BRU

SEABRU

Seattle/Tacoma Intl

Thu 5/7

3:40 pm-12:55 pm

1 stop12h 15m

Brussels Bruxelles-National

Fri 5/15

1:50 pm-8:40 pm

1 stop15h 50m

$405

SeattleBrussels

SEA - BRU

SEABRU

Seattle/Tacoma Intl

Fri 5/1

7:00 pm-12:55 pm

1 stop32h 55m

Brussels Bruxelles-National

Sun 5/10

1:50 pm-5:55 pm

1 stop13h 05m

$406

SeattleBrussels

SEA - BRU

SEABRU

Seattle/Tacoma Intl

Wed 2/25

2:35 pm-11:55 am

1 stop12h 20m

Brussels Bruxelles-National

Fri 3/6

12:50 pm-5:00 pm

1 stop13h 10m

$415

SeattleBrussels

SEA - BRU

SEABRU

Seattle/Tacoma Intl

Sun 3/29

3:40 pm-12:55 pm

1 stop12h 15m

Brussels Bruxelles-National

Mon 4/13

1:50 pm-8:40 pm

1 stop15h 50m

$416

SeattleBrussels

SEA - BRU

SEABRU

Seattle/Tacoma Intl

Sat 5/9

3:40 pm-12:55 pm

1 stop12h 15m

Brussels Bruxelles-National

Fri 5/22

1:50 pm-5:55 pm

1 stop13h 05m

$429

SeattleBrussels

SEA - BRU

SEABRU

Seattle/Tacoma Intl

Fri 5/8

3:40 pm-12:55 pm

1 stop12h 15m

Brussels Bruxelles-National

Fri 5/22

1:50 pm-5:55 pm

1 stop13h 05m

$437

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-8:56 pm

2 stops42h 56m

$438

SeattleBrussels

SEA - BRU

SEABRU

Seattle/Tacoma Intl

Tue 2/10

9:55 am-7:50 am

2 stops36h 55m

Brussels Bruxelles-National

Tue 3/10

10:00 am-7:16 pm

2 stops41h 16m

$450

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

$451

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 October. Flight prices, which tend to average around $476, are often lower during this time because this is during the off-season. If you aren’t able to travel during the month of October, then book flights to Brussels Bruxelles-National Airport from Seattle during September instead. Flights to Brussels Bruxelles-National Airport in September, while not as cheap as those in October, still average around $514.

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 $617 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 1% 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 6% 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 $385Free CancellationRating
7.1
602 reviews
Search Icelandair flights
British AirwaysPriceFrom $474Free CancellationRating
6.7
7,690 reviews
Search British Airways flights
DeltaPriceFrom $482Free CancellationRating
7.9
8,080 reviews
Search Delta flights
United AirlinesPriceFrom $483Free CancellationRating
7.4
9,184 reviews
Search United Airlines flights
Virgin AtlanticPriceFrom $488Free CancellationRating
7.5
678 reviews
Search Virgin Atlantic flights
LufthansaPriceFrom $494Free CancellationRating
6.8
7,734 reviews
Search Lufthansa flights
KLMPriceFrom $508Free CancellationRating
7.7
1,442 reviews
Search KLM flights
Air CanadaPriceFrom $518Free CancellationRating
7.1
10,641 reviews
Search Air Canada flights
Aer LingusPriceFrom $536Free CancellationRating
7.2
1,437 reviews
Search Aer Lingus flights

Traveling to a place near Brussels?

Book flights to Brussels if you plan to visit one of these locations
Bruges
Ghent
Leuven
Charleroi
Zaventem
Spa
Hasselt
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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