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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
$338Icelandair
Thu, Jan 29 - Thu, Feb 12
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
7:00 pm - 12:55 pm
SEA
-
BRU
32h 55m
1 stop
Icelandair Logo
1:50 pm - 8:40 pm
BRU
-
SEA
15h 50m
1 stop
$407Icelandair
Fri, May 1 - Sun, May 10
United Airlines Logo
7:00 am - 8:55 am
SEA
-
BRU
16h 55m
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
Multiple Airlines Logo
3:40 pm - 7:50 am
SEA
-
BRU
55h 10m
2 stops
Multiple Airlines Logo
10:00 am - 9:33 am
BRU
-
SEA
55h 33m
2 stops
$443Multiple Airlines
Fri, Feb 6 - Fri, Mar 27
British Airways Logo
6:50 pm - 4:40 pm
SEA
-
BRU
12h 50m
1 stop
British Airways Logo
8:45 pm - 12:30 pm
BRU
-
SEA
23h 45m
1 stop
$444British Airways
Mon, Mar 2 - Mon, Mar 9
Air Canada Logo
10:05 am - 7:50 am
SEA
-
BRU
36h 45m
2 stops
Air Canada Logo
10:00 am - 7:16 pm
BRU
-
SEA
41h 16m
2 stops
$445Air Canada
Mon, Mar 2 - Mon, Mar 9
Air Canada Logo
9:55 am - 7:50 am
SEA
-
BRU
36h 55m
2 stops
Air Canada Logo
10:00 am - 10:16 pm
BRU
-
SEA
45h 16m
2 stops
$448Air Canada
Thu, Jan 29 - Thu, Feb 12
British Airways Logo
1:37 pm - 4:40 pm
SEA
-
BRU
18h 03m
2 stops
British Airways Logo
5:30 pm - 12:30 pm
BRU
-
SEA
27h 00m
1 stop
$449British Airways
Mon, Mar 2 - Mon, Mar 9
Multiple Airlines Logo
2:35 pm - 6:20 pm
SEA
-
CRL
18h 45m
2 stops
Multiple Airlines Logo
6:25 am - 5:00 pm
CRL
-
SEA
19h 35m
2 stops
$540Multiple Airlines
Fri, Feb 27 - Fri, Mar 6

British Airways flights from Seattle to Brussels

Our best British Airways deals on Seattle to Brussels flight tickets
British Airways
Mar 2
SEA6:50 pmSeattle/Tacoma Intl
12h 50m
1 stop
BRU4:40 pmBrussels Bruxelles-National
Mar 9
BRU8:45 pmBrussels Bruxelles-National
23h 45m
1 stop
SEA12:30 pmSeattle/Tacoma Intl
$444
British Airways
Mar 2
SEA1:37 pmSeattle/Tacoma Intl
18h 03m
2 stops
BRU4:40 pmBrussels Bruxelles-National
Mar 9
BRU5:30 pmBrussels Bruxelles-National
27h 00m
1 stop
SEA12:30 pmSeattle/Tacoma Intl
$449
British Airways
Mar 3
SEA1:25 pmSeattle/Tacoma Intl
12h 25m
1 stop
BRU10:50 amBrussels Bruxelles-National
Apr 1
BRU9:15 pmBrussels Bruxelles-National
34h 58m
2 stops
SEA11:13 pmSeattle/Tacoma Intl
$466

Air Canada flights from Seattle to Brussels

Our best Air Canada deals on Seattle to Brussels flight tickets
Air Canada
Mar 2
SEA10:05 amSeattle/Tacoma Intl
36h 45m
2 stops
BRU7:50 amBrussels Bruxelles-National
Mar 9
BRU10:00 amBrussels Bruxelles-National
41h 16m
2 stops
SEA7:16 pmSeattle/Tacoma Intl
$445
Air Canada
Jan 29
SEA9:55 amSeattle/Tacoma Intl
36h 55m
2 stops
BRU7:50 amBrussels Bruxelles-National
Feb 12
BRU10:00 amBrussels Bruxelles-National
45h 16m
2 stops
SEA10:16 pmSeattle/Tacoma Intl
$448
Air Canada
Feb 10
SEA3:40 pmSeattle/Tacoma Intl
31h 10m
2 stops
BRU7:50 amBrussels Bruxelles-National
Mar 10
BRU10:00 amBrussels Bruxelles-National
37h 01m
2 stops
SEA3:01 pmSeattle/Tacoma Intl
$450

momondo Fare Finder

 
Customize your flight search to find flights from Seattle to Brussels 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 16, 2026.
Use the filters below to find and compare flights from Seattle to Brussels that are best for you.

Fly from

Fly to

Route

Depart

Return

Price

SeattleBrussels

SEA - BRU

SEABRU

Seattle/Tacoma Intl

Thu 1/29

2:35 pm-11:55 am

1 stop12h 20m

Brussels Bruxelles-National

Thu 2/12

12:50 pm-5:00 pm

1 stop13h 10m

$338

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

Fri 5/1

7:00 pm-12:55 pm

1 stop32h 55m

Brussels Bruxelles-National

Sun 5/10

1:50 pm-8:40 pm

1 stop15h 50m

$407

SeattleBrussels

SEA - BRU

SEABRU

Seattle/Tacoma Intl

Tue 2/10

7:00 am-8:55 am

1 stop16h 55m

Brussels Bruxelles-National

Tue 3/10

10:00 am-8:56 pm

2 stops42h 56m

$438

SeattleBrussels

SEA - BRU

SEABRU

Seattle/Tacoma Intl

Fri 2/6

3:40 pm-7:50 am

2 stops55h 10m

Brussels Bruxelles-National

Fri 3/27

10:00 am-9:33 am

2 stops55h 33m

$443

SeattleBrussels

SEA - BRU

SEABRU

Seattle/Tacoma Intl

Mon 3/2

6:50 pm-4:40 pm

1 stop12h 50m

Brussels Bruxelles-National

Mon 3/9

8:45 pm-12:30 pm

1 stop23h 45m

$444

SeattleBrussels

SEA - BRU

SEABRU

Seattle/Tacoma Intl

Mon 3/2

10:05 am-7:50 am

2 stops36h 45m

Brussels Bruxelles-National

Mon 3/9

10:00 am-7:16 pm

2 stops41h 16m

$445

SeattleBrussels

SEA - BRU

SEABRU

Seattle/Tacoma Intl

Thu 1/29

9:55 am-7:50 am

2 stops36h 55m

Brussels Bruxelles-National

Thu 2/12

10:00 am-10:16 pm

2 stops45h 16m

$448

SeattleBrussels

SEA - BRU

SEABRU

Seattle/Tacoma Intl

Mon 3/2

1:37 pm-4:40 pm

2 stops18h 03m

Brussels Bruxelles-National

Mon 3/9

5:30 pm-12:30 pm

1 stop27h 00m

$449

SeattleBrussels

SEA - CRL

SEACRL

Seattle/Tacoma Intl

Fri 2/27

2:35 pm-6:20 pm

2 stops18h 45m

Charleroi Brussels

Fri 3/6

6:25 am-5:00 pm

2 stops19h 35m

$540

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

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?

In general, October is the cheapest month to fly from Seattle to Brussels. Due to it being the ‘off-season’ during this time, you can expect flight prices to be around $476. If you are unable to visit Brussels during the month of October, then departing from Seattle during the month September is also very affordable. Most momondo users find prices during this month for around $514.

How far in advance should I book a flight to Brussels?

You are more likely to see cheaper flights to Brussels from Seattle when booking weeks ahead of your departure date. In general, you can expect to find flights to Brussels for around $622 when searching weeks out. However, flight prices might be lower outside of this timeframe. For example, people recently found flights to Brussels from Seattle for as low as $542 on momondo.

Cheap Seattle to Brussels flight deals and tips

Find info about flight duration, direct flights, and airports for your flight from Seattle to Brussels

Fastest flight time

12h 20m

Direct flights

None
The fastest flight from Seattle to Brussels takes 12h 20m
There are no direct flights from Seattle to Brussels. There are no popular flight routes from Seattle to Brussels.
Search flight deals

  • How far is Seattle/Tacoma Intl to Brussels by plane?

    A flight from Seattle/Tacoma Intl to Brussels will travel around 4931.7 mi. 12h 20m is a normal flight duration for this route.

  • When did momondo last update prices for flights from Seattle/Tacoma Intl Airport to Brussels?

    Prices for flights from Seattle/Tacoma Intl Airport to Brussels refresh daily.

  • How many operators does momondo search for flights from Seattle/Tacoma Intl Airport to Brussels?

  • How old do you have to be to fly from Seattle/Tacoma Intl Airport to Brussels?

    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.

  • What documentation or ID do you need to fly to Brussels?

    The travel and health documents required for your trip to Brussels 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. We always recommend checking with your airline or a trusted third party such as IATA to get advice.

Best airlines flying from Seattle to Brussels

Compare and see reviews for airlines that fly from Seattle to Brussels with momondo
Airline
Rating
Free Cancellation
Price
IcelandairPriceFrom $386Free CancellationRating
7.1
596 reviews
Search Icelandair flights
DeltaPriceFrom $482Free CancellationRating
7.9
8,057 reviews
Search Delta flights
United AirlinesPriceFrom $483Free CancellationRating
7.4
9,165 reviews
Search United Airlines flights
British AirwaysPriceFrom $485Free CancellationRating
6.7
7,684 reviews
Search British Airways flights
Virgin AtlanticPriceFrom $488Free CancellationRating
7.5
678 reviews
Search Virgin Atlantic flights
LufthansaPriceFrom $494Free CancellationRating
6.8
7,719 reviews
Search Lufthansa flights
KLMPriceFrom $508Free CancellationRating
7.7
1,440 reviews
Search KLM flights
Air CanadaPriceFrom $518Free CancellationRating
7.1
10,627 reviews
Search Air Canada flights
Aer LingusPriceFrom $536Free CancellationRating
7.2
1,435 reviews
Search Aer Lingus flights

Why use momondo?

Why should I use momondo to find a flight deal from Seattle to Brussels?

It is quick and easy to find Seattle to Brussels flights on momondo. We search and return numerous flight options from various airlines and agents. You can then use our filters to narrow your search until you have found the most convenient flight to Brussels that suits you.

Can I find flights from Seattle to Brussels with flexible booking policies on momondo?

Yes. momondo allows you to filter the results for Seattle to Brussels flights to just show those with flexible booking policies.

How can momondo help me find flights from Seattle to Brussels?

momondo helps you find the best flight between Seattle and Brussels by providing filters to narrow your choice of flights to those matching your criteria. You can select flights based on numerous factors such as price, departure and landing times, airport and airline.

I’m not ready to book a flight from Seattle to Brussels right now. Can momondo alert me if prices change?

If you are not ready to book a flight from Seattle to Brussels now, use our insights above to find helpful tips or alternatively set up a price alert, where momondo will track prices on flights to Brussels and let you know when they change.

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Find better results for your trip to Belgium

Fly into one of these airports located in Brussels

Airports listed have a maximum distance of 27.4 mi from Brussels
Brussels Bruxelles-National Airport
Charleroi Brussels Airport