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Cheap flights from Seattle to Brussels from $222

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 9/22. 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
12:50 pm - 6:00 pm
BRU
-
SEA
13h 10m
1 stop
$522Icelandair
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
$523Icelandair
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
$527Icelandair
Sun, Oct 4 - Thu, Oct 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
$529Icelandair
Tue, Oct 6 - Thu, Oct 15
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
$534Icelandair
Tue, Sep 1 - Wed, Sep 9
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
$549Icelandair
Sat, Oct 3 - Thu, Oct 15
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
$550Icelandair
Wed, Oct 7 - Fri, Oct 16
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
$567Icelandair
Mon, Nov 2 - Thu, Nov 12
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
$584Icelandair
Tue, Sep 8 - Fri, Sep 18
Icelandair Logo
3:35 pm - 11:55 am
SEA
-
BRU
12h 20m
1 stop
Icelandair Logo
12:50 pm - 5:00 pm
BRU
-
SEA
13h 10m
1 stop
$589Icelandair
Sat, Oct 31 - Tue, Nov 10

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
$522
Icelandair
Oct 5
SEA7:00 pmSeattle/Tacoma Intl
32h 55m
1 stop
BRU12:55 pmBrussels Bruxelles-National
Oct 15
BRU1:50 pmBrussels Bruxelles-National
13h 05m
1 stop
SEA5:55 pmSeattle/Tacoma Intl
$523
Icelandair
Oct 4
SEA3:40 pmSeattle/Tacoma Intl
12h 15m
1 stop
BRU12:55 pmBrussels Bruxelles-National
Oct 15
BRU1:50 pmBrussels Bruxelles-National
15h 50m
1 stop
SEA8:40 pmSeattle/Tacoma Intl
$527

Air Canada flights from Seattle to Brussels Bruxelles-National Airport

Our best Air Canada deals on Seattle to Brussels Bruxelles-National Airport flight tickets
Air Canada
Nov 2
SEA3:15 pmSeattle/Tacoma Intl
19h 45m
2 stops
BRU8:00 pmBrussels Bruxelles-National
Nov 13
BRU10:00 amBrussels Bruxelles-National
32h 17m
2 stops
SEA9:17 amSeattle/Tacoma Intl
$713
Air Canada
Oct 31
SEA7:05 pmSeattle/Tacoma Intl
53h 50m
2 stops
BRU8:55 amBrussels Bruxelles-National
Nov 10
BRU8:25 amBrussels Bruxelles-National
18h 57m
2 stops
SEA6:22 pmSeattle/Tacoma Intl
$717
Air Canada
Oct 30
SEA3:15 pmSeattle/Tacoma Intl
56h 35m
2 stops
BRU7:50 amBrussels Bruxelles-National
Nov 12
BRU10:00 amBrussels Bruxelles-National
20h 57m
2 stops
SEA9:57 pmSeattle/Tacoma Intl
$720

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 29, 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

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

$522

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

$523

SeattleBrussels

SEA - BRU

SEABRU

Seattle/Tacoma Intl

Sun 10/4

3:40 pm-12:55 pm

1 stop12h 15m

Brussels Bruxelles-National

Thu 10/15

1:50 pm-8:40 pm

1 stop15h 50m

$527

SeattleBrussels

SEA - BRU

SEABRU

Seattle/Tacoma Intl

Tue 10/6

7:00 pm-12:55 pm

1 stop32h 55m

Brussels Bruxelles-National

Thu 10/15

1:50 pm-5:55 pm

1 stop13h 05m

$529
Quickest round-trip

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-5:55 pm

1 stop13h 05m

$534

SeattleBrussels

SEA - BRU

SEABRU

Seattle/Tacoma Intl

Sat 10/3

3:40 pm-12:55 pm

1 stop12h 15m

Brussels Bruxelles-National

Thu 10/15

1:50 pm-5:55 pm

1 stop13h 05m

$549

SeattleBrussels

SEA - BRU

SEABRU

Seattle/Tacoma Intl

Wed 10/7

3:40 pm-12:55 pm

1 stop12h 15m

Brussels Bruxelles-National

Fri 10/16

1:50 pm-5:55 pm

1 stop13h 05m

$550

SeattleBrussels

SEA - BRU

SEABRU

Seattle/Tacoma Intl

Mon 11/2

2:35 pm-11:55 am

1 stop12h 20m

Brussels Bruxelles-National

Thu 11/12

12:50 pm-5:00 pm

1 stop13h 10m

$567

SeattleBrussels

SEA - BRU

SEABRU

Seattle/Tacoma Intl

Tue 9/8

3:40 pm-12:55 pm

1 stop12h 15m

Brussels Bruxelles-National

Fri 9/18

1:50 pm-8:40 pm

1 stop15h 50m

$584

SeattleBrussels

SEA - BRU

SEABRU

Seattle/Tacoma Intl

Sat 10/31

3:35 pm-11:55 am

1 stop12h 20m

Brussels Bruxelles-National

Tue 11/10

12:50 pm-5:00 pm

1 stop13h 10m

$589

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?

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 $625 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 31% 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
661 reviews
Search Icelandair flights
British AirwaysPriceFrom $421Free CancellationRating
6.7
8,008 reviews
Search British Airways flights
United AirlinesPriceFrom $470Free CancellationRating
7.4
9,762 reviews
Search United Airlines flights
KLMPriceFrom $481Free CancellationRating
7.8
1,526 reviews
Search KLM flights
DeltaPriceFrom $482Free CancellationRating
7.9
8,421 reviews
Search Delta flights
Air CanadaPriceFrom $485Free CancellationRating
7.1
11,096 reviews
Search Air Canada flights
LufthansaPriceFrom $494Free CancellationRating
6.8
8,032 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
Zaventem
Mons
Hasselt
Durbuy
Genk
Dinant
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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