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Cheap flights from Seattle to Brussels from $188

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 4/14. 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
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
$398Icelandair
Thu, Apr 16 - Thu, Apr 23
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
$399Icelandair
Thu, Apr 16 - Thu, Apr 23
Icelandair Logo
2:35 pm - 11:55 am
SEA
-
BRU
12h 20m
1 stop
Icelandair Logo
12:50 pm - 6:00 pm
BRU
-
SEA
13h 10m
1 stop
$411Icelandair
Thu, Mar 5 - Thu, Mar 19
United Airlines Logo
8:42 am - 1:15 pm
SEA
-
BRU
19h 33m
3 stops
United Airlines Logo
9:25 am - 8:53 pm
BRU
-
SEA
44h 28m
2 stops
$485United Airlines
Wed, Apr 8 - Tue, Apr 21
United Airlines Logo
5:00 am - 1:15 pm
SEA
-
BRU
24h 15m
2 stops
United Airlines Logo
9:25 am - 8:53 pm
BRU
-
SEA
44h 28m
2 stops
$486United Airlines
Wed, Mar 18 - Tue, Mar 31
Air Canada Logo
5:40 am - 7:10 am
SEA
-
BRU
16h 30m
2 stops
Air Canada Logo
9:25 am - 7:20 pm
BRU
-
SEA
18h 55m
2 stops
$501Air Canada
Wed, Apr 8 - Tue, Apr 21
Icelandair Logo
3:35 pm - 11:55 am
SEA
-
BRU
12h 20m
1 stop
Icelandair Logo
1:50 pm - 8:40 pm
BRU
-
SEA
15h 50m
1 stop
$502Icelandair
Wed, Mar 25 - Mon, Mar 30
United Airlines Logo
9:20 am - 1:15 pm
SEA
-
BRU
19h 55m
2 stops
United Airlines Logo
9:40 am - 9:53 pm
BRU
-
SEA
21h 13m
1 stop
$504United Airlines
Wed, Mar 18 - Tue, Mar 31
United Airlines Logo
9:20 am - 1:15 pm
SEA
-
BRU
19h 55m
2 stops
United Airlines Logo
10:15 am - 12:19 am
BRU
-
SEA
23h 04m
1 stop
$505United Airlines
Wed, Mar 18 - Thu, Apr 2
Multiple Airlines Logo
3:40 pm - 8:00 pm
SEA
-
BRU
19h 20m
2 stops
Multiple Airlines Logo
9:25 am - 10:50 pm
BRU
-
SEA
22h 25m
2 stops
$506Multiple Airlines
Tue, Mar 31 - Thu, Apr 23

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
Apr 30
SEA1:35 pmSeattle/Tacoma Intl
17h 35m
1 stop
BRU4:10 pmBrussels Bruxelles-National
May 5
BRU10:55 amBrussels Bruxelles-National
33h 40m
1 stop
SEA11:35 amSeattle/Tacoma Intl
$508
British Airways
Apr 30
SEA7:00 amSeattle/Tacoma Intl
24h 10m
2 stops
BRU4:10 pmBrussels Bruxelles-National
May 5
BRU7:55 pmBrussels Bruxelles-National
24h 40m
1 stop
SEA11:35 amSeattle/Tacoma Intl
$513
British Airways
Apr 30
SEA1:35 pmSeattle/Tacoma Intl
17h 35m
1 stop
BRU4:10 pmBrussels Bruxelles-National
May 5
BRU7:55 pmBrussels Bruxelles-National
24h 40m
1 stop
SEA11:35 amSeattle/Tacoma Intl
$515

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 8
SEA3:40 pmSeattle/Tacoma Intl
19h 20m
2 stops
BRU8:00 pmBrussels Bruxelles-National
Apr 21
BRU9:25 amBrussels Bruxelles-National
35h 23m
2 stops
SEA11:48 amSeattle/Tacoma Intl
$481
United Airlines
Apr 8
SEA8:42 amSeattle/Tacoma Intl
19h 33m
2 stops
BRU1:15 pmBrussels Bruxelles-National
Apr 21
BRU9:25 amBrussels Bruxelles-National
44h 28m
2 stops
SEA8:53 pmSeattle/Tacoma Intl
$485
United Airlines
Mar 18
SEA5:00 amSeattle/Tacoma Intl
24h 15m
2 stops
BRU1:15 pmBrussels Bruxelles-National
Mar 31
BRU9:25 amBrussels Bruxelles-National
44h 28m
2 stops
SEA8:53 pmSeattle/Tacoma Intl
$486

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 February 18, 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 4/16

3:40 pm-12:55 pm

1 stop12h 15m

Brussels Bruxelles-National

Thu 4/23

1:50 pm-8:40 pm

1 stop15h 50m

$398

SeattleBrussels

SEA - BRU

SEABRU

Seattle/Tacoma Intl

Thu 4/16

3:40 pm-12:55 pm

1 stop12h 15m

Brussels Bruxelles-National

Thu 4/23

1:50 pm-8:40 pm

1 stop15h 50m

$399

SeattleBrussels

SEA - BRU

SEABRU

Seattle/Tacoma Intl

Thu 3/5

2:35 pm-11:55 am

1 stop12h 20m

Brussels Bruxelles-National

Thu 3/19

12:50 pm-6:00 pm

1 stop13h 10m

$411

SeattleBrussels

SEA - BRU

SEABRU

Seattle/Tacoma Intl

Wed 4/8

8:42 am-1:15 pm

3 stops19h 33m

Brussels Bruxelles-National

Tue 4/21

9:25 am-8:53 pm

2 stops44h 28m

$485

SeattleBrussels

SEA - BRU

SEABRU

Seattle/Tacoma Intl

Wed 3/18

5:00 am-1:15 pm

2 stops24h 15m

Brussels Bruxelles-National

Tue 3/31

9:25 am-8:53 pm

2 stops44h 28m

$486

SeattleBrussels

SEA - BRU

SEABRU

Seattle/Tacoma Intl

Wed 4/8

5:40 am-7:10 am

2 stops16h 30m

Brussels Bruxelles-National

Tue 4/21

9:25 am-7:20 pm

2 stops18h 55m

$501

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-8:40 pm

1 stop15h 50m

$502

SeattleBrussels

SEA - BRU

SEABRU

Seattle/Tacoma Intl

Wed 3/18

9:20 am-1:15 pm

2 stops19h 55m

Brussels Bruxelles-National

Tue 3/31

9:40 am-9:53 pm

1 stop21h 13m

$504

SeattleBrussels

SEA - BRU

SEABRU

Seattle/Tacoma Intl

Wed 3/18

9:20 am-1:15 pm

2 stops19h 55m

Brussels Bruxelles-National

Thu 4/2

10:15 am-12:19 am

1 stop23h 04m

$505

SeattleBrussels

SEA - BRU

SEABRU

Seattle/Tacoma Intl

Tue 3/31

3:40 pm-8:00 pm

2 stops19h 20m

Brussels Bruxelles-National

Thu 4/23

9:25 am-10:50 pm

2 stops22h 25m

$506

Flights are sorted by cheapest round-trip flights first.

Showing 1-10 of 20 resultsSorted by cheapest first
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2

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 $508.

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 $615 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 27% 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 February 2026, prices for Seattle to Brussels Bruxelles-National Airport flights are approximately 49% 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 $384Free CancellationRating
7.1
615 reviews
Search Icelandair flights
British AirwaysPriceFrom $436Free CancellationRating
6.7
7,752 reviews
Search British Airways flights
DeltaPriceFrom $482Free CancellationRating
7.9
8,208 reviews
Search Delta flights
United AirlinesPriceFrom $483Free CancellationRating
7.4
9,317 reviews
Search United Airlines flights
KLMPriceFrom $486Free CancellationRating
7.7
1,457 reviews
Search KLM flights
Virgin AtlanticPriceFrom $488Free CancellationRating
7.5
678 reviews
Search Virgin Atlantic flights
LufthansaPriceFrom $494Free CancellationRating
6.8
7,790 reviews
Search Lufthansa flights
Air CanadaPriceFrom $518Free CancellationRating
7.1
10,733 reviews
Search Air Canada flights
Aer LingusPriceFrom $536Free CancellationRating
7.2
1,455 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
Zaventem
Hasselt
Namur
Dinant
Genk
Mons
Waterloo
Durbuy
Spa
Aalst
Knokke-Heist
Mechelen
Francorchamps
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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