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Cheap flights from Seattle to Brussels from $345

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 3/24. 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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Cheap round-trip flights

Enter your travel dates to find the best prices.
Icelandair Logo
2:35 pm - 11:55 amSEA-BRU
12h 20m1 stop
Icelandair Logo
12:50 pm - 5:00 pmBRU-SEA
13h 10m1 stop
$381Icelandair
Find Deal
Sat, Jan 17 - Fri, Jan 23
Icelandair Logo
2:35 pm - 11:55 amSEA-BRU
12h 20m1 stop
Icelandair Logo
12:50 pm - 5:00 pmBRU-SEA
13h 10m1 stop
$388Icelandair
Find Deal
Sat, Jan 17 - Fri, Jan 23
Icelandair Logo
3:35 pm - 11:55 amSEA-BRU
12h 20m1 stop
Icelandair Logo
1:50 pm - 5:50 pmBRU-SEA
13h 00m1 stop
$393Icelandair
Find Deal
Wed, Mar 25 - Mon, Mar 30
Icelandair Logo
3:45 pm - 12:50 pmSEA-BRU
12h 05m1 stop
Icelandair Logo
1:50 pm - 8:45 pmBRU-SEA
15h 55m1 stop
$397Icelandair
Find Deal
Sun, Apr 12 - Mon, Apr 20
Lufthansa Logo
7:00 am - 8:55 amSEA-BRU
16h 55m1 stop
Lufthansa Logo
10:30 am - 12:10 pmBRU-SEA
34h 40m1 stop
$473Lufthansa
Find Deal
Sat, Jan 17 - Fri, Jan 23
Brussels Airlines Logo
8:10 am - 7:15 amSEA-BRU
14h 05m1 stop
Brussels Airlines Logo
9:10 pm - 6:14 pmBRU-SEA
30h 04m2 stops
$474Brussels Airlines
Find Deal
Sat, Jan 17 - Fri, Jan 23
United Airlines Logo
3:40 pm - 8:55 amSEA-BRU
32h 15m2 stops
United Airlines Logo
10:00 am - 8:57 pmBRU-SEA
43h 57m2 stops
$476United Airlines
Find Deal
Tue, Jan 6 - Tue, Jan 13
United Airlines Logo
8:40 am - 1:15 pmSEA-BRU
19h 35m2 stops
United Airlines Logo
10:00 am - 11:49 amBRU-SEA
33h 49m2 stops
$480United Airlines
Find Deal
Tue, Feb 10 - Tue, Mar 10
Lufthansa Logo
10:05 am - 7:50 amSEA-BRU
36h 45m2 stops
Lufthansa Logo
7:00 am - 1:10 pmBRU-SEA
14h 10m1 stop
$489Lufthansa
Find Deal
Tue, Feb 10 - Tue, Mar 10
British Airways Logo
6:50 pm - 9:25 amSEA-BRU
29h 35m1 stop
British Airways Logo
9:45 pm - 5:55 pmBRU-SEA
28h 10m1 stop
$490British Airways
Find Deal
Tue, Feb 10 - Tue, Mar 10

British Airways flights from Seattle to Brussels Bruxelles-National Airport

Our best British Airways deals on Seattle to Brussels Bruxelles-National Airport flight tickets
British Airways
Feb 10
SEA6:50 pmSeattle/Tacoma Intl
29h 35m
1 stop
BRU9:25 amBrussels Bruxelles-National
Mar 10
BRU9:45 pmBrussels Bruxelles-National
28h 10m
1 stop
SEA5:55 pmSeattle/Tacoma Intl
$490
Find similar
British Airways
Jan 17
SEA6:50 pmSeattle/Tacoma Intl
12h 45m
1 stop
BRU4:35 pmBrussels Bruxelles-National
Jan 23
BRU8:20 pmBrussels Bruxelles-National
35h 00m
2 stops
SEA10:20 pmSeattle/Tacoma Intl
$516
Find similar
British Airways
Apr 12
SEA8:20 pmSeattle/Tacoma Intl
28h 45m
1 stop
BRU10:05 amBrussels Bruxelles-National
Apr 20
BRU3:00 pmBrussels Bruxelles-National
41h 05m
2 stops
SEA11:05 pmSeattle/Tacoma Intl
$576
Find similar

Icelandair flights from Seattle to Brussels Bruxelles-National Airport

Our best Icelandair deals on Seattle to Brussels Bruxelles-National Airport flight tickets
Icelandair
Jan 17
SEA2:35 pmSeattle/Tacoma Intl
12h 20m
1 stop
BRU11:55 amBrussels Bruxelles-National
Jan 23
BRU12:50 pmBrussels Bruxelles-National
13h 10m
1 stop
SEA5:00 pmSeattle/Tacoma Intl
$381
Find similar
Icelandair
Jan 17
SEA2:35 pmSeattle/Tacoma Intl
12h 20m
1 stop
BRU11:55 amBrussels Bruxelles-National
Jan 23
BRU12:50 pmBrussels Bruxelles-National
13h 10m
1 stop
SEA5:00 pmSeattle/Tacoma Intl
$388
Find similar
Icelandair
Mar 25
SEA3:35 pmSeattle/Tacoma Intl
12h 20m
1 stop
BRU11:55 amBrussels Bruxelles-National
Mar 30
BRU1:50 pmBrussels Bruxelles-National
13h 00m
1 stop
SEA5:50 pmSeattle/Tacoma Intl
$393
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 November 23, 2025.
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

Sat 1/17

2:35 pm-11:55 am

1 stop12h 20m

Brussels Bruxelles-National

Fri 1/23

12:50 pm-5:00 pm

1 stop13h 10m

$381

SeattleBrussels

SEA - BRU

SEABRU

Seattle/Tacoma Intl

Sat 1/17

2:35 pm-11:55 am

1 stop12h 20m

Brussels Bruxelles-National

Fri 1/23

12:50 pm-5:00 pm

1 stop13h 10m

$388

SeattleBrussels

SEA - BRU

SEABRU

Seattle/Tacoma Intl

Wed 3/25

3:35 pm-11:55 am

1 stop12h 20m

Brussels Bruxelles-National

Mon 3/30

1:50 pm-5:50 pm

1 stop13h 00m

$393

SeattleBrussels

SEA - BRU

SEABRU

Seattle/Tacoma Intl

Sun 4/12

3:45 pm-12:50 pm

1 stop12h 05m

Brussels Bruxelles-National

Mon 4/20

1:50 pm-8:45 pm

1 stop15h 55m

$397

SeattleBrussels

SEA - BRU

SEABRU

Seattle/Tacoma Intl

Sat 1/17

7:00 am-8:55 am

1 stop16h 55m

Brussels Bruxelles-National

Fri 1/23

10:30 am-12:10 pm

1 stop34h 40m

$473

SeattleBrussels

SEA - BRU

SEABRU

Seattle/Tacoma Intl

Sat 1/17

8:10 am-7:15 am

1 stop14h 05m

Brussels Bruxelles-National

Fri 1/23

9:10 pm-6:14 pm

2 stops30h 04m

$474

SeattleBrussels

SEA - BRU

SEABRU

Seattle/Tacoma Intl

Tue 1/6

3:40 pm-8:55 am

2 stops32h 15m

Brussels Bruxelles-National

Tue 1/13

10:00 am-8:57 pm

2 stops43h 57m

$476

SeattleBrussels

SEA - BRU

SEABRU

Seattle/Tacoma Intl

Tue 2/10

8:40 am-1:15 pm

2 stops19h 35m

Brussels Bruxelles-National

Tue 3/10

10:00 am-11:49 am

2 stops33h 49m

$480

SeattleBrussels

SEA - BRU

SEABRU

Seattle/Tacoma Intl

Tue 2/10

10:05 am-7:50 am

2 stops36h 45m

Brussels Bruxelles-National

Tue 3/10

7:00 am-1:10 pm

1 stop14h 10m

$489

SeattleBrussels

SEA - BRU

SEABRU

Seattle/Tacoma Intl

Tue 2/10

6:50 pm-9:25 am

1 stop29h 35m

Brussels Bruxelles-National

Tue 3/10

9:45 pm-5:55 pm

1 stop28h 10m

$490

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.

What is the cheapest day to depart on your flight to Brussels Bruxelles-National Airport?

The cheapest day to depart from Seattle to Brussels Bruxelles-National Airport is on a Tuesday. Travelers who choose to depart for Brussels Bruxelles-National Airport on a Tuesday will often find tickets for as low as $626. When flying out on a Wednesday, the most expensive travel day of the week, you can expect to see flight prices from Seattle to Brussels Bruxelles-National Airport for around $783.

What is the cheapest time of day to depart on your flight to Brussels Bruxelles-National Airport?

Our most recent data shows that the best time of day to fly to Brussels Bruxelles-National Airport is in the morning. Flights from Seattle to Brussels Bruxelles-National Airport during this time can be as low as $668. If you have a flexible travel schedule, then try to avoid flying at noon when prices are $738 on average. Flights to Brussels Bruxelles-National Airport from Seattle at noon are generally more expensive because this time of day is more convenient for travelers’ schedules.

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 $636 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 $537 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.

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

Direct flights

None
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 05m 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
7.0
581 reviews
Search Icelandair flights
Virgin AtlanticPriceFrom $488Free CancellationRating
7.5
675 reviews
Search Virgin Atlantic flights
United AirlinesPriceFrom $502Free CancellationRating
7.4
9,033 reviews
Search United Airlines flights
British AirwaysPriceFrom $503Free CancellationRating
6.7
7,535 reviews
Search British Airways flights
Air FrancePriceFrom $506Free CancellationRating
7.4
1,493 reviews
Search Air France flights
KLMPriceFrom $511Free CancellationRating
7.7
1,418 reviews
Search KLM flights
DeltaPriceFrom $514Free CancellationRating
7.9
7,999 reviews
Search Delta flights
Aer LingusPriceFrom $532Free CancellationRating
7.2
1,378 reviews
Search Aer Lingus flights
Air CanadaPriceFrom $556Free CancellationRating
7.1
10,468 reviews
Search Air Canada flights
LufthansaPriceFrom $561Free CancellationRating
6.8
7,581 reviews
Search Lufthansa 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
Mons
Genk
Waterloo
Mechelen
Durbuy
Francorchamps
Knokke-Heist
Aalst
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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