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Cheap flights from Seattle to Brussels from $297

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 9/1. 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
$614Icelandair
Wed, Nov 4 - Tue, Nov 17
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
$615Icelandair
Wed, Nov 4 - Thu, Nov 19
Icelandair Logo
3:40 pm - 12:55 pm
SEA
-
BRU
12h 15m
1 stop
Icelandair Logo
12:50 pm - 6:00 pm
BRU
-
SEA
13h 10m
1 stop
$642Icelandair
Sun, Oct 18 - Thu, Oct 29
Icelandair Logo
3:40 pm - 12:55 pm
SEA
-
BRU
12h 15m
1 stop
Icelandair Logo
12:50 pm - 6:00 pm
BRU
-
SEA
13h 10m
1 stop
$648Icelandair
Sun, Oct 18 - Thu, Oct 29
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
$650Icelandair
Mon, Oct 5 - Thu, Oct 15
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
$663Icelandair
Tue, Sep 1 - Wed, Sep 9
Icelandair Logo
11:25 pm - 12:55 pm
SEA
-
BRU
28h 30m
1 stop
Icelandair Logo
1:50 pm - 8:40 pm
BRU
-
SEA
15h 50m
1 stop
$664Icelandair
Tue, Sep 1 - Wed, Sep 9
Icelandair Logo
11:25 pm - 12:55 pm
SEA
-
BRU
28h 30m
1 stop
Icelandair Logo
1:50 pm - 5:55 pm
BRU
-
SEA
13h 05m
1 stop
$665Icelandair
Wed, Sep 2 - Wed, Sep 9
Icelandair Logo
11:25 pm - 12:55 pm
SEA
-
BRU
28h 30m
1 stop
Icelandair Logo
1:50 pm - 8:40 pm
BRU
-
SEA
15h 50m
1 stop
$680Icelandair
Thu, Sep 10 - Sat, Sep 19
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
$682Icelandair
Sun, Sep 27 - Thu, Oct 1

Icelandair flights from Seattle to Brussels Bruxelles-National Airport

Our best Icelandair deals on Seattle to Brussels Bruxelles-National Airport flight tickets
Icelandair
Oct 18
SEA3:40 pmSeattle/Tacoma Intl
12h 15m
1 stop
BRU12:55 pmBrussels Bruxelles-National
Oct 29
BRU12:50 pmBrussels Bruxelles-National
13h 10m
1 stop
SEA6:00 pmSeattle/Tacoma Intl
$642
Icelandair
Aug 1
SEA11:25 pmSeattle/Tacoma Intl
28h 30m
1 stop
BRU12:55 pmBrussels Bruxelles-National
Oct 5
BRU1:50 pmBrussels Bruxelles-National
13h 05m
1 stop
SEA5:55 pmSeattle/Tacoma Intl
$645
Icelandair
Oct 18
SEA3:40 pmSeattle/Tacoma Intl
12h 15m
1 stop
BRU12:55 pmBrussels Bruxelles-National
Oct 29
BRU12:50 pmBrussels Bruxelles-National
13h 10m
1 stop
SEA6:00 pmSeattle/Tacoma Intl
$648

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
Oct 5
SEA7:20 pmSeattle/Tacoma Intl
39h 40m
2 stops
BRU8:00 pmBrussels Bruxelles-National
Oct 15
BRU6:20 amBrussels Bruxelles-National
25h 22m
2 stops
SEA10:42 pmSeattle/Tacoma Intl
$778
United Airlines
Oct 5
SEA7:20 pmSeattle/Tacoma Intl
39h 40m
2 stops
BRU8:00 pmBrussels Bruxelles-National
Oct 15
BRU6:20 amBrussels Bruxelles-National
36h 32m
2 stops
SEA9:52 amSeattle/Tacoma Intl
$779
United Airlines
Sep 1
SEA8:10 amSeattle/Tacoma Intl
20h 05m
2 stops
BRU1:15 pmBrussels Bruxelles-National
Sep 9
BRU6:20 amBrussels Bruxelles-National
14h 35m
1 stop
SEA11:55 amSeattle/Tacoma Intl
$783

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 May 11, 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

Cheapest round-trip

SeattleBrussels

SEA - BRU

SEABRU

Seattle/Tacoma Intl

Wed 11/4

2:35 pm-11:55 am

1 stop12h 20m

Brussels Bruxelles-National

Tue 11/17

12:50 pm-5:00 pm

1 stop13h 10m

$614

SeattleBrussels

SEA - BRU

SEABRU

Seattle/Tacoma Intl

Wed 11/4

2:35 pm-11:55 am

1 stop12h 20m

Brussels Bruxelles-National

Thu 11/19

12:50 pm-5:00 pm

1 stop13h 10m

$615

SeattleBrussels

SEA - BRU

SEABRU

Seattle/Tacoma Intl

Sun 10/18

3:40 pm-12:55 pm

1 stop12h 15m

Brussels Bruxelles-National

Thu 10/29

12:50 pm-6:00 pm

1 stop13h 10m

$642

SeattleBrussels

SEA - BRU

SEABRU

Seattle/Tacoma Intl

Sun 10/18

3:40 pm-12:55 pm

1 stop12h 15m

Brussels Bruxelles-National

Thu 10/29

12:50 pm-6:00 pm

1 stop13h 10m

$648

SeattleBrussels

SEA - BRU

SEABRU

Seattle/Tacoma Intl

Mon 10/5

7:00 pm-12:55 pm

1 stop32h 55m

Brussels Bruxelles-National

Thu 10/15

1:50 pm-5:55 pm

1 stop13h 05m

$650

SeattleBrussels

SEA - BRU

SEABRU

Seattle/Tacoma Intl

Tue 9/1

3:40 pm-12:55 pm

1 stop12h 15m

Brussels Bruxelles-National

Wed 9/9

1:50 pm-8:40 pm

1 stop15h 50m

$663

SeattleBrussels

SEA - BRU

SEABRU

Seattle/Tacoma Intl

Tue 9/1

11:25 pm-12:55 pm

1 stop28h 30m

Brussels Bruxelles-National

Wed 9/9

1:50 pm-8:40 pm

1 stop15h 50m

$664

SeattleBrussels

SEA - BRU

SEABRU

Seattle/Tacoma Intl

Wed 9/2

11:25 pm-12:55 pm

1 stop28h 30m

Brussels Bruxelles-National

Wed 9/9

1:50 pm-5:55 pm

1 stop13h 05m

$665

SeattleBrussels

SEA - BRU

SEABRU

Seattle/Tacoma Intl

Thu 9/10

11:25 pm-12:55 pm

1 stop28h 30m

Brussels Bruxelles-National

Sat 9/19

1:50 pm-8:40 pm

1 stop15h 50m

$680
Quickest round-trip

SeattleBrussels

SEA - BRU

SEABRU

Seattle/Tacoma Intl

Sun 9/27

3:40 pm-12:55 pm

1 stop12h 15m

Brussels Bruxelles-National

Thu 10/1

1:50 pm-5:55 pm

1 stop13h 05m

$682

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

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 $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 January, then book flights to Brussels Bruxelles-National Airport from Seattle during August instead. Flights to Brussels Bruxelles-National Airport in August, while not as cheap as those in January, still average around $514.

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 $618 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 $503 on momondo.

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

You could potentially save up to 15% 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 May 2026, prices for Seattle to Brussels Bruxelles-National Airport flights are approximately 58% 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

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 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 $383Free CancellationRating
7.0
653 reviews
Search Icelandair flights
British AirwaysPriceFrom $421Free CancellationRating
6.7
7,972 reviews
Search British Airways flights
United AirlinesPriceFrom $470Free CancellationRating
7.4
9,701 reviews
Search United Airlines flights
KLMPriceFrom $481Free CancellationRating
7.8
1,514 reviews
Search KLM flights
DeltaPriceFrom $482Free CancellationRating
7.9
8,448 reviews
Search Delta flights
Air CanadaPriceFrom $485Free CancellationRating
7.1
11,017 reviews
Search Air Canada flights
Virgin AtlanticPriceFrom $488Free CancellationRating
7.4
688 reviews
Search Virgin Atlantic flights
LufthansaPriceFrom $494Free CancellationRating
6.8
7,992 reviews
Search Lufthansa flights

Traveling to a place near Brussels?

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