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Cheap flights from Seattle to Brussels from $233

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.
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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
$340Icelandair
Thu, Jan 29 - Thu, Feb 12
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
$385Icelandair
Thu, Jan 29 - Thu, Feb 12
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
$387Icelandair
Thu, Jan 29 - Thu, Feb 12
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
$388Icelandair
Thu, Jan 29 - Thu, Feb 12
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
$390Icelandair
Wed, Feb 4 - Thu, Feb 12
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
$391Icelandair
Thu, Jan 29 - Thu, Feb 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
$395Icelandair
Sun, Apr 26 - Fri, May 8
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
$398Icelandair
Sun, Apr 26 - Fri, May 8
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
Multiple Airlines Logo
3:10 pm - 10:10 pm
SEA
-
CRL
22h 00m
2 stops
Multiple Airlines Logo
8:55 pm - 10:16 pm
CRL
-
SEA
34h 21m
3 stops
$651Multiple Airlines
Fri, Feb 27 - Fri, Mar 6

Icelandair flights from Seattle to Brussels

Our best Icelandair deals on Seattle to Brussels flight tickets
Icelandair
Jan 29
SEA2:35 pmSeattle/Tacoma Intl
12h 20m
1 stop
BRU11:55 amBrussels Bruxelles-National
Feb 12
BRU12:50 pmBrussels Bruxelles-National
13h 10m
1 stop
SEA5:00 pmSeattle/Tacoma Intl
$340
Icelandair
Jan 29
SEA2:35 pmSeattle/Tacoma Intl
12h 20m
1 stop
BRU11:55 amBrussels Bruxelles-National
Feb 12
BRU12:50 pmBrussels Bruxelles-National
13h 10m
1 stop
SEA5:00 pmSeattle/Tacoma Intl
$385
Icelandair
Jan 29
SEA2:35 pmSeattle/Tacoma Intl
12h 20m
1 stop
BRU11:55 amBrussels Bruxelles-National
Feb 12
BRU12:50 pmBrussels Bruxelles-National
13h 10m
1 stop
SEA5:00 pmSeattle/Tacoma Intl
$387

British Airways flights from Seattle to Brussels

Our best British Airways deals on Seattle to Brussels flight tickets
British Airways
Feb 4
SEA5:45 pmSeattle/Tacoma Intl
16h 50m
2 stops
BRU7:35 pmBrussels Bruxelles-National
Feb 12
BRU8:35 pmBrussels Bruxelles-National
23h 55m
1 stop
SEA11:30 amSeattle/Tacoma Intl
$439
British Airways
Mar 3
SEA7:15 amSeattle/Tacoma Intl
27h 30m
2 stops
BRU7:45 pmBrussels Bruxelles-National
Apr 1
BRU9:15 pmBrussels Bruxelles-National
34h 58m
2 stops
SEA11:13 pmSeattle/Tacoma Intl
$451
British Airways
Mar 3
SEA1:25 pmSeattle/Tacoma Intl
12h 25m
1 stop
BRU10:50 amBrussels Bruxelles-National
Apr 1
BRU4:00 pmBrussels Bruxelles-National
41h 24m
2 stops
SEA12:24 amSeattle/Tacoma Intl
$453

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 14, 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

$340

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

$385

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

$387

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

$388

SeattleBrussels

SEA - BRU

SEABRU

Seattle/Tacoma Intl

Wed 2/4

2:35 pm-11:55 am

1 stop12h 20m

Brussels Bruxelles-National

Thu 2/12

12:50 pm-5:00 pm

1 stop13h 10m

$390

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

$391

SeattleBrussels

SEA - BRU

SEABRU

Seattle/Tacoma Intl

Sun 4/26

3:40 pm-12:55 pm

1 stop12h 15m

Brussels Bruxelles-National

Fri 5/8

1:50 pm-8:40 pm

1 stop15h 50m

$395

SeattleBrussels

SEA - BRU

SEABRU

Seattle/Tacoma Intl

Sun 4/26

3:40 pm-12:55 pm

1 stop12h 15m

Brussels Bruxelles-National

Fri 5/8

1:50 pm-5:55 pm

1 stop13h 05m

$398

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

SeattleBrussels

SEA - CRL

SEACRL

Seattle/Tacoma Intl

Fri 2/27

3:10 pm-10:10 pm

2 stops22h 00m

Charleroi Brussels

Fri 3/6

8:55 pm-10:16 pm

3 stops34h 21m

$651

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 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 $385Free CancellationRating
7.1
596 reviews
Search Icelandair flights
DeltaPriceFrom $482Free CancellationRating
7.9
8,040 reviews
Search Delta flights
United AirlinesPriceFrom $483Free CancellationRating
7.4
9,156 reviews
Search United Airlines flights
British AirwaysPriceFrom $485Free CancellationRating
6.7
7,671 reviews
Search British Airways flights
Virgin AtlanticPriceFrom $488Free CancellationRating
7.5
678 reviews
Search Virgin Atlantic flights
LufthansaPriceFrom $494Free CancellationRating
6.8
7,711 reviews
Search Lufthansa flights
KLMPriceFrom $508Free CancellationRating
7.7
1,437 reviews
Search KLM flights
Air CanadaPriceFrom $518Free CancellationRating
7.1
10,619 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