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Cheap flights from Seattle to Belgium from $206

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 Belgium departing on 1/15. 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 Belgium

Cheap round-trip flights

Enter your travel dates to find the best prices.
Icelandair Logo
2:35 pm - 11:55 am
SEA
-
BRU
12h 20m1 stop
Icelandair Logo
12:50 pm - 5:00 pm
BRU
-
SEA
13h 10m1 stop
$381Icelandair
Thu, Jan 15 - Thu, Jan 29
Icelandair Logo
2:35 pm - 11:55 am
SEA
-
BRU
12h 20m1 stop
Icelandair Logo
12:50 pm - 5:00 pm
BRU
-
SEA
13h 10m1 stop
$385Icelandair
Thu, Jan 15 - Thu, Jan 29
Air Canada Logo
8:10 am - 1:15 pm
SEA
-
BRU
20h 05m2 stops
Air Canada Logo
10:00 am - 7:16 pm
BRU
-
SEA
18h 16m2 stops
$461Air Canada
Thu, Feb 12 - Thu, Feb 19
Multiple Airlines Logo
8:10 am - 1:15 pm
SEA
-
BRU
20h 05m2 stops
Multiple Airlines Logo
7:00 am - 12:10 pm
BRU
-
SEA
14h 10m1 stop
$470Multiple Airlines
Thu, Feb 12 - Thu, Feb 19
Multiple Airlines Logo
3:40 pm - 8:55 am
SEA
-
BRU
32h 15m2 stops
Multiple Airlines Logo
10:00 am - 7:16 pm
BRU
-
SEA
18h 16m2 stops
$476Multiple Airlines
Wed, Feb 11 - Wed, Feb 18
Brussels Airlines Logo
7:00 am - 1:15 pm
SEA
-
BRU
21h 15m2 stops
Brussels Airlines Logo
10:10 am - 7:03 pm
BRU
-
SEA
17h 53m1 stop
$480Brussels Airlines
Sun, Feb 1 - Sat, Feb 28
United Airlines Logo
3:40 pm - 1:15 pm
SEA
-
BRU
36h 35m2 stops
United Airlines Logo
10:00 am - 8:56 pm
BRU
-
SEA
43h 56m2 stops
$481United Airlines
Wed, Feb 11 - Wed, Feb 18
Multiple Airlines Logo
8:10 am - 1:15 pm
SEA
-
BRU
20h 05m2 stops
Multiple Airlines Logo
7:00 am - 12:10 pm
BRU
-
SEA
14h 10m1 stop
$482Multiple Airlines
Mon, Jan 26 - Mon, Feb 2
Brussels Airlines Logo
8:10 am - 7:15 am
SEA
-
BRU
14h 05m1 stop
Brussels Airlines Logo
10:10 am - 7:03 pm
BRU
-
SEA
17h 53m1 stop
$483Brussels Airlines
Sun, Feb 1 - Sat, Feb 28
Lufthansa Logo
7:00 am - 8:55 am
SEA
-
BRU
16h 55m1 stop
Lufthansa Logo
7:00 am - 1:10 pm
BRU
-
SEA
14h 10m1 stop
$484Lufthansa
Tue, Feb 10 - Tue, Mar 10

Brussels Airlines flights from Seattle to Belgium

Our best Brussels Airlines deals on Seattle to Belgium flight tickets
Brussels Airlines
Feb 1
SEA7:00 amSeattle/Tacoma Intl
21h 15m
2 stops
BRU1:15 pmBrussels Bruxelles-National
Feb 28
BRU10:10 amBrussels Bruxelles-National
17h 53m
1 stop
SEA7:03 pmSeattle/Tacoma Intl
$480
Find similar
Brussels Airlines
Feb 1
SEA8:10 amSeattle/Tacoma Intl
14h 05m
1 stop
BRU7:15 amBrussels Bruxelles-National
Feb 28
BRU10:10 amBrussels Bruxelles-National
17h 53m
1 stop
SEA7:03 pmSeattle/Tacoma Intl
$483
Find similar
Brussels Airlines
Jan 4
SEA5:00 amSeattle/Tacoma Intl
23h 15m
2 stops
BRU1:15 pmBrussels Bruxelles-National
Jan 16
BRU11:55 amBrussels Bruxelles-National
18h 02m
1 stop
SEA8:57 pmSeattle/Tacoma Intl
$720
Find similar

United Airlines flights from Seattle to Belgium

Our best United Airlines deals on Seattle to Belgium flight tickets
United Airlines
Feb 11
SEA3:40 pmSeattle/Tacoma Intl
36h 35m
2 stops
BRU1:15 pmBrussels Bruxelles-National
Feb 18
BRU10:00 amBrussels Bruxelles-National
43h 56m
2 stops
SEA8:56 pmSeattle/Tacoma Intl
$481
Find similar
United Airlines
Feb 10
SEA8:40 amSeattle/Tacoma Intl
19h 35m
3 stops
BRU1:15 pmBrussels Bruxelles-National
Mar 10
BRU10:00 amBrussels Bruxelles-National
42h 56m
2 stops
SEA8:56 pmSeattle/Tacoma Intl
$485
Find similar
United Airlines
Feb 10
SEA10:58 amSeattle/Tacoma Intl
12h 57m
1 stop
BRU8:55 amBrussels Bruxelles-National
Mar 10
BRU10:00 amBrussels Bruxelles-National
42h 56m
2 stops
SEA8:56 pmSeattle/Tacoma Intl
$488
Find similar

momondo Fare Finder

 
Customize your flight search to find flights from Seattle to Belgium 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 December 30, 2025.
Use the filters below to find and compare flights from Seattle to Belgium that are best for you.

Fly from

Fly to

Route

Depart

Return

Price

SeattleBrussels

SEA - BRU

SEABRU

Seattle/Tacoma Intl

Thu 1/15

2:35 pm-11:55 am

1 stop12h 20m

Brussels Bruxelles-National

Thu 1/29

12:50 pm-5:00 pm

1 stop13h 10m

$381

SeattleBrussels

SEA - BRU

SEABRU

Seattle/Tacoma Intl

Thu 1/15

2:35 pm-11:55 am

1 stop12h 20m

Brussels Bruxelles-National

Thu 1/29

12:50 pm-5:00 pm

1 stop13h 10m

$385

SeattleBrussels

SEA - BRU

SEABRU

Seattle/Tacoma Intl

Thu 2/12

8:10 am-1:15 pm

2 stops20h 05m

Brussels Bruxelles-National

Thu 2/19

10:00 am-7:16 pm

2 stops18h 16m

$461

SeattleBrussels

SEA - BRU

SEABRU

Seattle/Tacoma Intl

Thu 2/12

8:10 am-1:15 pm

2 stops20h 05m

Brussels Bruxelles-National

Thu 2/19

7:00 am-12:10 pm

1 stop14h 10m

$470

SeattleBrussels

SEA - BRU

SEABRU

Seattle/Tacoma Intl

Wed 2/11

3:40 pm-8:55 am

2 stops32h 15m

Brussels Bruxelles-National

Wed 2/18

10:00 am-7:16 pm

2 stops18h 16m

$476

SeattleBrussels

SEA - BRU

SEABRU

Seattle/Tacoma Intl

Sun 2/1

7:00 am-1:15 pm

2 stops21h 15m

Brussels Bruxelles-National

Sat 2/28

10:10 am-7:03 pm

1 stop17h 53m

$480

SeattleBrussels

SEA - BRU

SEABRU

Seattle/Tacoma Intl

Wed 2/11

3:40 pm-1:15 pm

2 stops36h 35m

Brussels Bruxelles-National

Wed 2/18

10:00 am-8:56 pm

2 stops43h 56m

$481

SeattleBrussels

SEA - BRU

SEABRU

Seattle/Tacoma Intl

Mon 1/26

8:10 am-1:15 pm

2 stops20h 05m

Brussels Bruxelles-National

Mon 2/2

7:00 am-12:10 pm

1 stop14h 10m

$482

SeattleBrussels

SEA - BRU

SEABRU

Seattle/Tacoma Intl

Sun 2/1

8:10 am-7:15 am

1 stop14h 05m

Brussels Bruxelles-National

Sat 2/28

10:10 am-7:03 pm

1 stop17h 53m

$483

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

7:00 am-1:10 pm

1 stop14h 10m

$484

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 Belgium from

How to get the cheapest flight ticket from Seattle to Belgium

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 Belgium?

In general, October is the cheapest month to fly from Seattle to Belgium. 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 Belgium 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 Belgium?

You are more likely to see cheaper flights to Belgium from Seattle when booking weeks ahead of your departure date. In general, you can expect to find flights to Belgium for around $629 when searching weeks out. However, flight prices might be lower outside of this timeframe. For example, people recently found flights to Belgium from Seattle for as low as $537 on momondo.

Can stopping save me money on Seattle to Belgium flights?

You could potentially save up to 38% on your flight if you consider stops on a Seattle to Belgium flight.

Cheap Seattle to Belgium flight deals and tips

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

Fastest flight time

12h 10m

Direct flights

None
The fastest flight from Seattle to Belgium takes 12h 10m
There are no direct flights from Seattle to Belgium. There are no popular flight routes from Seattle to Belgium.
Search flight deals

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

    Prices for flights from Seattle/Tacoma Intl Airport to Belgium are refreshed on a daily basis.

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

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

    Although the minimum age for a child to fly alone is five, airlines that offer an unaccompanied minor (UMNR) service may have their own age limits, which could be impacted by factors such as flight length, timing, and layovers. It is recommended that you verify with the airline you are booking with for travel from Seattle/Tacoma Intl Airport to Belgium.

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

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

Best airlines flying from Seattle to Belgium

Compare and see reviews for airlines that fly from Seattle to Belgium with momondo
Airline
Rating
Free Cancellation
Price
IcelandairPriceFrom $387Free CancellationRating
7.0
592 reviews
Search Icelandair flights
DeltaPriceFrom $482Free CancellationRating
7.9
8,017 reviews
Search Delta flights
United AirlinesPriceFrom $483Free CancellationRating
7.4
9,122 reviews
Search United Airlines flights
British AirwaysPriceFrom $485Free CancellationRating
6.7
7,625 reviews
Search British Airways flights
Virgin AtlanticPriceFrom $488Free CancellationRating
7.5
677 reviews
Search Virgin Atlantic flights
LufthansaPriceFrom $501Free CancellationRating
6.8
7,663 reviews
Search Lufthansa flights
Air FrancePriceFrom $506Free CancellationRating
7.4
1,516 reviews
Search Air France flights
KLMPriceFrom $511Free CancellationRating
7.7
1,435 reviews
Search KLM flights
Air CanadaPriceFrom $518Free CancellationRating
7.1
10,564 reviews
Search Air Canada flights
Aer LingusPriceFrom $532Free CancellationRating
7.2
1,415 reviews
Search Aer Lingus flights

Why use momondo?

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

We help find the flight that best suits your needs, momondo compares prices from hundreds of airlines and travel agents and helps you filter them to find the best flight from Seattle to Belgium for you.

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

Yes. momondo enables you to select and highlight flights to Belgium from Seattle with this policy.

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

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 Belgium.

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

Yes momondo offers price alerts on flights to Belgium from Seattle. After performing a search on this page you should be able to see the price alert set up feature. Simply provide a valid email address and momondo will instantly alert you when prices change.

An easier way to manage your Belgium trip

We make it super easy to schedule, organize and travel with friends or family. Trips is free — and available to use no matter where you book.
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