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Cheap flights from Seattle to Belgium from $213

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 4/14. 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
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
$399Icelandair
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
$411Icelandair
Tue, Mar 31 - Thu, Apr 23
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
$415Icelandair
Tue, Mar 31 - 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
$426Icelandair
Thu, May 7 - Wed, May 20
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
$427Icelandair
Thu, May 7 - Sun, May 24
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
$433Icelandair
Wed, Apr 8 - Thu, Apr 16
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
$437Icelandair
Sun, Mar 29 - 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
$466Icelandair
Wed, Apr 1 - Thu, Apr 23
United Airlines Logo
3:40 pm - 8:00 pm
SEA
-
BRU
19h 20m
2 stops
United Airlines Logo
9:25 am - 11:48 am
BRU
-
SEA
35h 23m
2 stops
$481United Airlines
Wed, Apr 8 - Tue, Apr 21
Multiple Airlines Logo
2:35 pm - 10:05 pm
SEA
-
CRL
22h 30m
2 stops
Multiple Airlines Logo
7:20 pm - 4:40 pm
CRL
-
SEA
29h 20m
2 stops
$939Multiple Airlines
Sat, Mar 7 - Fri, Mar 13

Icelandair flights from Seattle to Belgium

Our best Icelandair deals on Seattle to Belgium flight tickets
Icelandair
Apr 16
SEA3:40 pmSeattle/Tacoma Intl
12h 15m
1 stop
BRU12:55 pmBrussels Bruxelles-National
Apr 23
BRU1:50 pmBrussels Bruxelles-National
15h 50m
1 stop
SEA8:40 pmSeattle/Tacoma Intl
$399
Icelandair
Mar 31
SEA7:00 pmSeattle/Tacoma Intl
32h 55m
1 stop
BRU12:55 pmBrussels Bruxelles-National
Apr 23
BRU1:50 pmBrussels Bruxelles-National
15h 50m
1 stop
SEA8:40 pmSeattle/Tacoma Intl
$411
Icelandair
Mar 31
SEA7:00 pmSeattle/Tacoma Intl
32h 55m
1 stop
BRU12:55 pmBrussels Bruxelles-National
Apr 23
BRU1:50 pmBrussels Bruxelles-National
13h 05m
1 stop
SEA5:55 pmSeattle/Tacoma Intl
$415

British Airways flights from Seattle to Belgium

Our best British Airways deals on Seattle to Belgium flight tickets
British Airways
Apr 30
SEA1:35 pmSeattle/Tacoma Intl
22h 05m
1 stop
BRU8:40 pmBrussels Bruxelles-National
May 5
BRU10:55 amBrussels Bruxelles-National
33h 40m
1 stop
SEA11:35 amSeattle/Tacoma Intl
$508
British Airways
Apr 30
SEA11:16 amSeattle/Tacoma Intl
24h 24m
2 stops
BRU8:40 pmBrussels Bruxelles-National
May 5
BRU7:55 pmBrussels Bruxelles-National
24h 40m
1 stop
SEA11:35 amSeattle/Tacoma Intl
$513
British Airways
Apr 30
SEA1:19 pmSeattle/Tacoma Intl
22h 21m
2 stops
BRU8:40 pmBrussels Bruxelles-National
May 5
BRU10:55 amBrussels Bruxelles-National
20h 43m
2 stops
SEA10:38 pmSeattle/Tacoma Intl
$516

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 February 16, 2026.
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 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

$399

SeattleBrussels

SEA - BRU

SEABRU

Seattle/Tacoma Intl

Tue 3/31

7:00 pm-12:55 pm

1 stop32h 55m

Brussels Bruxelles-National

Thu 4/23

1:50 pm-8:40 pm

1 stop15h 50m

$411

SeattleBrussels

SEA - BRU

SEABRU

Seattle/Tacoma Intl

Tue 3/31

7:00 pm-12:55 pm

1 stop32h 55m

Brussels Bruxelles-National

Thu 4/23

1:50 pm-5:55 pm

1 stop13h 05m

$415

SeattleBrussels

SEA - BRU

SEABRU

Seattle/Tacoma Intl

Thu 5/7

3:40 pm-12:55 pm

1 stop12h 15m

Brussels Bruxelles-National

Wed 5/20

1:50 pm-8:40 pm

1 stop15h 50m

$426

SeattleBrussels

SEA - BRU

SEABRU

Seattle/Tacoma Intl

Thu 5/7

3:40 pm-12:55 pm

1 stop12h 15m

Brussels Bruxelles-National

Sun 5/24

1:50 pm-11:45 am

1 stop30h 55m

$427

SeattleBrussels

SEA - BRU

SEABRU

Seattle/Tacoma Intl

Wed 4/8

7:00 pm-12:55 pm

1 stop32h 55m

Brussels Bruxelles-National

Thu 4/16

1:50 pm-5:55 pm

1 stop13h 05m

$433

SeattleBrussels

SEA - BRU

SEABRU

Seattle/Tacoma Intl

Sun 3/29

3:40 pm-12:55 pm

1 stop12h 15m

Brussels Bruxelles-National

Thu 4/23

1:50 pm-5:55 pm

1 stop13h 05m

$437

SeattleBrussels

SEA - BRU

SEABRU

Seattle/Tacoma Intl

Wed 4/1

3:40 pm-12:55 pm

1 stop12h 15m

Brussels Bruxelles-National

Thu 4/23

1:50 pm-5:55 pm

1 stop13h 05m

$466

SeattleBrussels

SEA - BRU

SEABRU

Seattle/Tacoma Intl

Wed 4/8

3:40 pm-8:00 pm

2 stops19h 20m

Brussels Bruxelles-National

Tue 4/21

9:25 am-11:48 am

2 stops35h 23m

$481

SeattleBrussels

SEA - CRL

SEACRL

Seattle/Tacoma Intl

Sat 3/7

2:35 pm-10:05 pm

2 stops22h 30m

Charleroi Brussels

Fri 3/13

7:20 pm-4:40 pm

2 stops29h 20m

$939

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 $508.

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 $614 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 $540 on momondo.

Can stopping save me money on Seattle to Belgium flights?

You could potentially save up to 27% 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 15m

Direct flights

None
The fastest flight from Seattle to Belgium takes 12h 15m
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 $384Free CancellationRating
7.1
614 reviews
Search Icelandair flights
British AirwaysPriceFrom $436Free CancellationRating
6.7
7,749 reviews
Search British Airways flights
DeltaPriceFrom $482Free CancellationRating
7.9
8,205 reviews
Search Delta flights
United AirlinesPriceFrom $483Free CancellationRating
7.4
9,293 reviews
Search United Airlines flights
KLMPriceFrom $486Free CancellationRating
7.7
1,455 reviews
Search KLM flights
Virgin AtlanticPriceFrom $488Free CancellationRating
7.5
678 reviews
Search Virgin Atlantic flights
LufthansaPriceFrom $496Free CancellationRating
6.8
7,786 reviews
Search Lufthansa flights
Air CanadaPriceFrom $518Free CancellationRating
7.1
10,721 reviews
Search Air Canada flights
Aer LingusPriceFrom $536Free CancellationRating
7.2
1,452 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

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