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Cheap flights from Seattle to Belgium from $239

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 10/14. 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
1 adult, Economy, 0 bags

Discover deals from 900+ travel sites with momondo.

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
12:50 pm - 6:00 pm
BRU
-
SEA
13h 10m
1 stop
$557Icelandair
Sun, Oct 18 - Thu, Oct 29
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
$558Icelandair
Mon, Oct 5 - Fri, Oct 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
$559Icelandair
Mon, Oct 5 - Sun, Oct 18
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
$560Icelandair
Sat, Oct 10 - Thu, Oct 22
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
$561Icelandair
Mon, Oct 5 - Sun, Oct 18
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
$562Icelandair
Thu, Aug 6 - Thu, Aug 20
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
$563Icelandair
Sat, Oct 3 - Thu, Oct 15
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
$564Icelandair
Sun, Oct 11 - Sat, Oct 24
Multiple Airlines Logo
3:40 pm - 10:55 pm
SEA
-
CRL
22h 15m
3 stops
Multiple Airlines Logo
4:50 pm - 4:00 pm
CRL
-
SEA
32h 10m
2 stops
$817Multiple Airlines
Mon, Oct 5 - Fri, Oct 23
Multiple Airlines Logo
3:40 pm - 10:55 pm
SEA
-
CRL
22h 15m
3 stops
Multiple Airlines Logo
9:50 am - 6:45 pm
CRL
-
SEA
41h 55m
3 stops
$821Multiple Airlines
Mon, Oct 5 - Fri, Oct 23

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Icelandair flights from Seattle to Belgium

Our best Icelandair deals on Seattle to Belgium flight tickets
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
$557
Icelandair
Oct 5
SEA7:00 pmSeattle/Tacoma Intl
32h 55m
1 stop
BRU12:55 pmBrussels Bruxelles-National
Oct 23
BRU1:50 pmBrussels Bruxelles-National
13h 05m
1 stop
SEA5:55 pmSeattle/Tacoma Intl
$558
Icelandair
Oct 5
SEA7:00 pmSeattle/Tacoma Intl
32h 55m
1 stop
BRU12:55 pmBrussels Bruxelles-National
Oct 18
BRU1:50 pmBrussels Bruxelles-National
15h 50m
1 stop
SEA8:40 pmSeattle/Tacoma Intl
$559

Lufthansa flights from Seattle to Belgium

Our best Lufthansa deals on Seattle to Belgium flight tickets
Lufthansa
Nov 3
SEA10:10 amSeattle/Tacoma Intl
36h 40m
2 stops
BRU7:50 amBrussels Bruxelles-National
Nov 10
BRU10:00 amBrussels Bruxelles-National
32h 27m
2 stops
SEA9:27 amSeattle/Tacoma Intl
$707
Lufthansa
Aug 1
SEA7:20 pmSeattle/Tacoma Intl
26h 50m
2 stops
BRU7:10 amBrussels Bruxelles-National
Aug 27
BRU9:30 amBrussels Bruxelles-National
18h 02m
2 stops
SEA6:32 pmSeattle/Tacoma Intl
$927
Lufthansa
Jul 24
SEA6:50 pmSeattle/Tacoma Intl
19h 05m
1 stop
BRU10:55 pmBrussels Bruxelles-National
Aug 9
BRU9:35 amBrussels Bruxelles-National
16h 24m
1 stop
SEA4:59 pmSeattle/Tacoma Intl
$997

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 July 23, 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

Cheapest 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

$557

SeattleBrussels

SEA - BRU

SEABRU

Seattle/Tacoma Intl

Mon 10/5

7:00 pm-12:55 pm

1 stop32h 55m

Brussels Bruxelles-National

Fri 10/23

1:50 pm-5:55 pm

1 stop13h 05m

$558

SeattleBrussels

SEA - BRU

SEABRU

Seattle/Tacoma Intl

Mon 10/5

7:00 pm-12:55 pm

1 stop32h 55m

Brussels Bruxelles-National

Sun 10/18

1:50 pm-8:40 pm

1 stop15h 50m

$559

SeattleBrussels

SEA - BRU

SEABRU

Seattle/Tacoma Intl

Sat 10/10

3:40 pm-12:55 pm

1 stop12h 15m

Brussels Bruxelles-National

Thu 10/22

1:50 pm-8:40 pm

1 stop15h 50m

$560

SeattleBrussels

SEA - BRU

SEABRU

Seattle/Tacoma Intl

Mon 10/5

7:00 pm-12:55 pm

1 stop32h 55m

Brussels Bruxelles-National

Sun 10/18

1:50 pm-8:40 pm

1 stop15h 50m

$561

SeattleBrussels

SEA - BRU

SEABRU

Seattle/Tacoma Intl

Thu 8/6

7:00 pm-12:55 pm

1 stop32h 55m

Brussels Bruxelles-National

Thu 8/20

1:50 pm-8:40 pm

1 stop15h 50m

$562
Quickest round-trip

SeattleBrussels

SEA - BRU

SEABRU

Seattle/Tacoma Intl

Sat 10/3

3:40 pm-12:55 pm

1 stop12h 15m

Brussels Bruxelles-National

Thu 10/15

1:50 pm-5:55 pm

1 stop13h 05m

$563

SeattleBrussels

SEA - BRU

SEABRU

Seattle/Tacoma Intl

Sun 10/11

3:40 pm-12:55 pm

1 stop12h 15m

Brussels Bruxelles-National

Sat 10/24

1:50 pm-5:55 pm

1 stop13h 05m

$564

SeattleBrussels

SEA - CRL

SEACRL

Seattle/Tacoma Intl

Mon 10/5

3:40 pm-10:55 pm

3 stops22h 15m

Charleroi Brussels

Fri 10/23

4:50 pm-4:00 pm

2 stops32h 10m

$817

SeattleBrussels

SEA - CRL

SEACRL

Seattle/Tacoma Intl

Mon 10/5

3:40 pm-10:55 pm

3 stops22h 15m

Charleroi Brussels

Fri 10/23

9:50 am-6:45 pm

3 stops41h 55m

$821

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, January 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 $510. If you are unable to visit Belgium during the month of January, then departing from Seattle during the month February is also very affordable. Most momondo users find prices during this month for around $556.

How far in advance should I book a flight from Seattle 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 $689 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 $503 on momondo.

Can stopping save me money on Seattle to Belgium flights?

You could potentially save up to 17% 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

Frequently asked questions about flying from Seattle to Belgium

  • 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 $383Free CancellationRating
7.0
717 reviews
Search Icelandair flights
British AirwaysPriceFrom $421Free CancellationRating
6.7
8,129 reviews
Search British Airways flights
KLMPriceFrom $481Free CancellationRating
7.8
1,544 reviews
Search KLM flights
DeltaPriceFrom $482Free CancellationRating
7.8
8,484 reviews
Search Delta flights
United AirlinesPriceFrom $483Free CancellationRating
7.4
10,025 reviews
Search United Airlines flights
LufthansaPriceFrom $494Free CancellationRating
6.8
8,156 reviews
Search Lufthansa 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.

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