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Cheap flights from Seattle to Brussels from $254

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 8/4. 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
1 adult, Economy, 0 bags

Discover deals from 900+ travel sites with momondo.

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
$554Icelandair
Mon, Nov 23 - Thu, Dec 3
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
$564Icelandair
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
$565Icelandair
Sun, Oct 18 - Thu, Oct 29
Icelandair Logo
3:40 pm - 12:55 pm
SEA
-
BRU
12h 15m
1 stop
Icelandair Logo
1:50 pm - 11:45 am
BRU
-
SEA
30h 55m
1 stop
$566Icelandair
Mon, Aug 3 - Wed, Aug 19
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
$567Icelandair
Mon, Oct 5 - Thu, Oct 15
Multiple Airlines Logo
7:00 pm - 9:15 pm
SEA
-
CRL
17h 15m
2 stops
Multiple Airlines Logo
7:05 am - 5:55 pm
CRL
-
SEA
19h 50m
2 stops
$570Multiple Airlines
Tue, Aug 18 - Thu, Aug 27
Icelandair Logo
3:40 pm - 12:55 pm
SEA
-
BRU
12h 15m
1 stop
Icelandair Logo
1:50 pm - 11:45 am
BRU
-
SEA
30h 55m
1 stop
$570Icelandair
Mon, Aug 3 - Wed, Aug 19
Icelandair Logo
3:40 pm - 12:55 pm
SEA
-
BRU
12h 15m
1 stop
Icelandair Logo
1:50 pm - 11:45 am
BRU
-
SEA
30h 55m
1 stop
$571Icelandair
Mon, Aug 3 - Wed, Aug 19
Icelandair Logo
11:25 pm - 12:55 pm
SEA
-
BRU
28h 30m
1 stop
Icelandair Logo
1:50 pm - 11:45 am
BRU
-
SEA
30h 55m
1 stop
$573Icelandair
Mon, Aug 3 - Wed, Aug 19
Multiple Airlines Logo
7:00 pm - 9:15 pm
SEA
-
CRL
17h 15m
2 stops
Multiple Airlines Logo
6:35 am - 9:40 am
CRL
-
SEA
36h 05m
3 stops
$743Multiple Airlines
Tue, Aug 18 - Thu, Aug 27

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Icelandair flights from Seattle to Brussels

Our best Icelandair deals on Seattle to Brussels flight tickets
Icelandair
Nov 23
SEA2:35 pmSeattle/Tacoma Intl
12h 20m
1 stop
BRU11:55 amBrussels Bruxelles-National
Dec 3
BRU12:50 pmBrussels Bruxelles-National
13h 10m
1 stop
SEA5:00 pmSeattle/Tacoma Intl
$554
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
$564
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
$565

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
19h 35m
2 stops
BRU8:30 pmBrussels Bruxelles-National
Sep 9
BRU9:10 pmBrussels Bruxelles-National
49h 35m
2 stops
SEA1:45 pmSeattle/Tacoma Intl
$681
Scandinavian Airlines
Sep 1
SEA3:55 pmSeattle/Tacoma Intl
17h 35m
1 stop
BRU6:30 pmBrussels Bruxelles-National
Sep 9
BRU9:10 pmBrussels Bruxelles-National
49h 35m
2 stops
SEA1:45 pmSeattle/Tacoma Intl
$684
Scandinavian Airlines
Sep 1
SEA3:55 pmSeattle/Tacoma Intl
17h 35m
1 stop
BRU6:30 pmBrussels Bruxelles-National
Sep 9
BRU9:10 pmBrussels Bruxelles-National
49h 35m
2 stops
SEA1:45 pmSeattle/Tacoma Intl
$685

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 June 30, 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

Mon 11/23

2:35 pm-11:55 am

1 stop12h 20m

Brussels Bruxelles-National

Thu 12/3

12:50 pm-5:00 pm

1 stop13h 10m

$554
Quickest 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

$564

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

$565

SeattleBrussels

SEA - BRU

SEABRU

Seattle/Tacoma Intl

Mon 8/3

3:40 pm-12:55 pm

1 stop12h 15m

Brussels Bruxelles-National

Wed 8/19

1:50 pm-11:45 am

1 stop30h 55m

$566

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-8:40 pm

1 stop15h 50m

$567

SeattleBrussels

SEA - CRL

SEACRL

Seattle/Tacoma Intl

Tue 8/18

7:00 pm-9:15 pm

2 stops17h 15m

Charleroi Brussels

Thu 8/27

7:05 am-5:55 pm

2 stops19h 50m

$570

SeattleBrussels

SEA - BRU

SEABRU

Seattle/Tacoma Intl

Mon 8/3

3:40 pm-12:55 pm

1 stop12h 15m

Brussels Bruxelles-National

Wed 8/19

1:50 pm-11:45 am

1 stop30h 55m

$570

SeattleBrussels

SEA - BRU

SEABRU

Seattle/Tacoma Intl

Mon 8/3

3:40 pm-12:55 pm

1 stop12h 15m

Brussels Bruxelles-National

Wed 8/19

1:50 pm-11:45 am

1 stop30h 55m

$571

SeattleBrussels

SEA - BRU

SEABRU

Seattle/Tacoma Intl

Mon 8/3

11:25 pm-12:55 pm

1 stop28h 30m

Brussels Bruxelles-National

Wed 8/19

1:50 pm-11:45 am

1 stop30h 55m

$573

SeattleBrussels

SEA - CRL

SEACRL

Seattle/Tacoma Intl

Tue 8/18

7:00 pm-9:15 pm

2 stops17h 15m

Charleroi Brussels

Thu 8/27

6:35 am-9:40 am

3 stops36h 05m

$743

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, January 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 $375. If you are unable to visit Brussels during the month of January, then departing from Seattle during the month April is also very affordable. Most momondo users find prices during this month for around $380.

How far in advance should I book a flight from Seattle 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 $669 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 $503 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

Frequently asked questions about flying from Seattle to Brussels

  • 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
7.0
694 reviews
Search Icelandair flights
British AirwaysPriceFrom $421Free CancellationRating
6.7
8,089 reviews
Search British Airways flights
United AirlinesPriceFrom $470Free CancellationRating
7.4
9,906 reviews
Search United Airlines flights
KLMPriceFrom $481Free CancellationRating
7.8
1,531 reviews
Search KLM flights
DeltaPriceFrom $482Free CancellationRating
7.8
8,452 reviews
Search Delta flights
LufthansaPriceFrom $494Free CancellationRating
6.8
8,109 reviews
Search Lufthansa 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