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Cheap flights from Seattle to Brussels from $232

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 4/30. 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
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
$488Icelandair
Tue, Apr 7 - Thu, Apr 23
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
$491Icelandair
Sat, Apr 18 - Fri, May 1
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
$505Icelandair
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
$524Icelandair
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 - 5:55 pm
BRU
-
SEA
13h 05m
1 stop
$532Icelandair
Thu, Apr 16 - Thu, Apr 23
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
$533Icelandair
Mon, May 4 - Tue, May 26
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
$537Icelandair
Sat, May 16 - Tue, May 26
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
$538Icelandair
Thu, May 7 - Mon, May 18
Multiple Airlines Logo
3:40 pm - 8:35 pm
SEA
-
CRL
19h 55m
2 stops
Multiple Airlines Logo
8:50 am - 10:25 am
CRL
-
SEA
34h 35m
3 stops
$681Multiple Airlines
Mon, Mar 30 - Fri, Apr 10
Multiple Airlines Logo
3:40 pm - 8:35 pm
SEA
-
CRL
19h 55m
3 stops
Multiple Airlines Logo
8:50 am - 10:25 am
CRL
-
SEA
34h 35m
3 stops
$750Multiple Airlines
Mon, Mar 30 - Fri, Apr 10

Scandinavian Airlines flights from Seattle to Brussels

Our best Scandinavian Airlines deals on Seattle to Brussels flight tickets
Scandinavian Airlines
Sep 1
SEA3:55 pmSeattle/Tacoma Intl
32h 45m
1 stop
BRU9:40 amBrussels Bruxelles-National
Sep 16
BRU9:10 pmBrussels Bruxelles-National
49h 35m
2 stops
SEA1:45 pmSeattle/Tacoma Intl
$613
Scandinavian Airlines
Mar 28
SEA7:20 amSeattle/Tacoma Intl
41h 20m
2 stops
BRU8:40 amBrussels Bruxelles-National
Apr 7
BRU7:10 pmBrussels Bruxelles-National
36h 00m
2 stops
SEA10:10 pmSeattle/Tacoma Intl
$844

Lufthansa flights from Seattle to Brussels

Our best Lufthansa deals on Seattle to Brussels flight tickets
Lufthansa
May 3
SEA6:50 pmSeattle/Tacoma Intl
12h 25m
1 stop
BRU4:15 pmBrussels Bruxelles-National
May 10
BRU8:30 amBrussels Bruxelles-National
12h 50m
1 stop
SEA12:20 pmSeattle/Tacoma Intl
$588
Lufthansa
May 3
SEA6:50 pmSeattle/Tacoma Intl
13h 25m
1 stop
BRU5:15 pmBrussels Bruxelles-National
May 10
BRU8:30 amBrussels Bruxelles-National
12h 50m
1 stop
SEA12:20 pmSeattle/Tacoma Intl
$593
Lufthansa
Apr 22
SEA6:50 pmSeattle/Tacoma Intl
13h 25m
1 stop
BRU5:15 pmBrussels Bruxelles-National
Apr 29
BRU8:30 amBrussels Bruxelles-National
12h 50m
1 stop
SEA12:20 pmSeattle/Tacoma Intl
$598

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 March 15, 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

Cheapest round-trip

SeattleBrussels

SEA - BRU

SEABRU

Seattle/Tacoma Intl

Tue 4/7

7:00 pm-12:55 pm

1 stop32h 55m

Brussels Bruxelles-National

Thu 4/23

1:50 pm-5:55 pm

1 stop13h 05m

$488

SeattleBrussels

SEA - BRU

SEABRU

Seattle/Tacoma Intl

Sat 4/18

7:00 pm-12:55 pm

1 stop32h 55m

Brussels Bruxelles-National

Fri 5/1

1:50 pm-8:40 pm

1 stop15h 50m

$491
Quickest round-trip

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-5:55 pm

1 stop13h 05m

$505

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

$524

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-5:55 pm

1 stop13h 05m

$532

SeattleBrussels

SEA - BRU

SEABRU

Seattle/Tacoma Intl

Mon 5/4

7:00 pm-12:55 pm

1 stop32h 55m

Brussels Bruxelles-National

Tue 5/26

1:50 pm-8:40 pm

1 stop15h 50m

$533

SeattleBrussels

SEA - BRU

SEABRU

Seattle/Tacoma Intl

Sat 5/16

7:00 pm-12:55 pm

1 stop32h 55m

Brussels Bruxelles-National

Tue 5/26

1:50 pm-8:40 pm

1 stop15h 50m

$537

SeattleBrussels

SEA - BRU

SEABRU

Seattle/Tacoma Intl

Thu 5/7

7:00 pm-12:55 pm

1 stop32h 55m

Brussels Bruxelles-National

Mon 5/18

1:50 pm-8:40 pm

1 stop15h 50m

$538

SeattleBrussels

SEA - CRL

SEACRL

Seattle/Tacoma Intl

Mon 3/30

3:40 pm-8:35 pm

2 stops19h 55m

Charleroi Brussels

Fri 4/10

8:50 am-10:25 am

3 stops34h 35m

$681

SeattleBrussels

SEA - CRL

SEACRL

Seattle/Tacoma Intl

Mon 3/30

3:40 pm-8:35 pm

3 stops19h 55m

Charleroi Brussels

Fri 4/10

8:50 am-10:25 am

3 stops34h 35m

$750

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

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 $463. If you are unable to visit Brussels during the month of October, then departing from Seattle during the month January is also very affordable. Most momondo users find prices during this month for around $510.

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 $610 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 $533 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 15m

Direct flights

None
The fastest flight from Seattle to Brussels takes 12h 15m
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 15m 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 $383Free CancellationRating
7.1
622 reviews
Search Icelandair flights
British AirwaysPriceFrom $421Free CancellationRating
6.7
7,794 reviews
Search British Airways flights
KLMPriceFrom $481Free CancellationRating
7.8
1,471 reviews
Search KLM flights
DeltaPriceFrom $482Free CancellationRating
7.9
8,294 reviews
Search Delta flights
United AirlinesPriceFrom $483Free CancellationRating
7.4
9,426 reviews
Search United Airlines flights
Virgin AtlanticPriceFrom $488Free CancellationRating
7.5
680 reviews
Search Virgin Atlantic flights
LufthansaPriceFrom $494Free CancellationRating
6.8
7,850 reviews
Search Lufthansa flights
Air CanadaPriceFrom $518Free CancellationRating
7.1
10,805 reviews
Search Air Canada 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