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Cheap flights from Washington to Belgium from $323

This is the cheapest one-way flight price found by a momondo user in the last 72 hours by searching for a flight from Washington to Belgium departing on 1/24. 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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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
$389Icelandair
Thu, Jan 15 - Thu, Jan 29
Lufthansa Logo
7:00 am - 8:55 am
SEA
-
BRU
16h 55m1 stop
Lufthansa Logo
9:05 am - 1:20 pm
BRU
-
SEA
13h 15m1 stop
$460Lufthansa
Wed, Jan 21 - Sun, Jan 25
Lufthansa Logo
9:55 am - 1:35 pm
SEA
-
BRU
18h 40m2 stops
Lufthansa Logo
6:45 am - 1:20 pm
BRU
-
SEA
15h 35m1 stop
$464Lufthansa
Wed, Jan 21 - Sun, Jan 25
Air Canada Logo
8:10 am - 1:15 pm
SEA
-
BRU
20h 05m2 stops
Air Canada Logo
10:00 am - 9:31 am
BRU
-
SEA
32h 31m2 stops
$468Air Canada
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 - 9:31 am
BRU
-
SEA
32h 31m2 stops
$469Air Canada
Thu, Jan 15 - Thu, Jan 29
Multiple Airlines Logo
3:40 pm - 8:00 pm
SEA
-
BRU
19h 20m2 stops
Multiple Airlines Logo
10:00 am - 10:06 pm
BRU
-
SEA
21h 06m2 stops
$472Multiple Airlines
Thu, Jan 15 - Thu, Jan 29
Multiple Airlines Logo
3:40 pm - 8:00 pm
SEA
-
BRU
19h 20m2 stops
Multiple Airlines Logo
10:00 am - 10:16 pm
BRU
-
SEA
21h 16m2 stops
$473Multiple Airlines
Thu, Feb 5 - Fri, Feb 13
United Airlines Logo
11:59 pm - 1:15 pm
PDX
-
BRU
28h 16m2 stops
United Airlines Logo
10:00 am - 9:49 pm
BRU
-
PDX
20h 49m2 stops
$507United Airlines
Sun, Jan 25 - Sun, Feb 1
United Airlines Logo
7:00 am - 8:55 am
PDX
-
BRU
16h 55m1 stop
United Airlines Logo
10:00 am - 9:49 pm
BRU
-
PDX
20h 49m2 stops
$511United Airlines
Sun, Jan 25 - Sun, Feb 1

Air Canada flights from State of Washington to Belgium

Our best Air Canada deals on State of Washington to Belgium flight tickets
Air Canada
Jan 23
SEA3:40 pmSeattle/Tacoma Intl
36h 35m
2 stops
BRU1:15 pmBrussels Bruxelles-National
Jan 30
BRU10:00 amBrussels Bruxelles-National
42h 16m
2 stops
SEA7:16 pmSeattle/Tacoma Intl
$462
Find similar
Air Canada
Jan 15
SEA8:10 amSeattle/Tacoma Intl
20h 05m
2 stops
BRU1:15 pmBrussels Bruxelles-National
Jan 29
BRU10:00 amBrussels Bruxelles-National
32h 31m
2 stops
SEA9:31 amSeattle/Tacoma Intl
$468
Find similar
Air Canada
Jan 15
SEA8:10 amSeattle/Tacoma Intl
20h 05m
2 stops
BRU1:15 pmBrussels Bruxelles-National
Jan 29
BRU10:00 amBrussels Bruxelles-National
32h 31m
2 stops
SEA9:31 amSeattle/Tacoma Intl
$469
Find similar

United Airlines flights from State of Washington to Belgium

Our best United Airlines deals on State of Washington to Belgium flight tickets
United Airlines
Jan 28
SEA8:40 amSeattle/Tacoma Intl
19h 35m
3 stops
BRU1:15 pmBrussels Bruxelles-National
Feb 1
BRU10:00 amBrussels Bruxelles-National
45h 43m
2 stops
SEA10:43 pmSeattle/Tacoma Intl
$484
Find similar
United Airlines
Jan 28
SEA7:00 amSeattle/Tacoma Intl
16h 55m
1 stop
BRU8:55 amBrussels Bruxelles-National
Feb 1
BRU10:00 amBrussels Bruxelles-National
45h 43m
2 stops
SEA10:43 pmSeattle/Tacoma Intl
$488
Find similar
United Airlines
Jan 15
SEA12:25 pmSeattle/Tacoma Intl
15h 50m
2 stops
BRU1:15 pmBrussels Bruxelles-National
Jan 29
BRU11:55 amBrussels Bruxelles-National
18h 02m
1 stop
SEA8:57 pmSeattle/Tacoma Intl
$495
Find similar

momondo Fare Finder

 
Customize your flight search to find flights from State of Washington 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 11, 2025.
Use the filters below to find and compare flights from Washington 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

$389

SeattleBrussels

SEA - BRU

SEABRU

Seattle/Tacoma Intl

Wed 1/21

7:00 am-8:55 am

1 stop16h 55m

Brussels Bruxelles-National

Sun 1/25

9:05 am-1:20 pm

1 stop13h 15m

$460

SeattleBrussels

SEA - BRU

SEABRU

Seattle/Tacoma Intl

Wed 1/21

9:55 am-1:35 pm

2 stops18h 40m

Brussels Bruxelles-National

Sun 1/25

6:45 am-1:20 pm

1 stop15h 35m

$464

SeattleBrussels

SEA - BRU

SEABRU

Seattle/Tacoma Intl

Thu 1/15

8:10 am-1:15 pm

2 stops20h 05m

Brussels Bruxelles-National

Thu 1/29

10:00 am-9:31 am

2 stops32h 31m

$468

SeattleBrussels

SEA - BRU

SEABRU

Seattle/Tacoma Intl

Thu 1/15

8:10 am-1:15 pm

2 stops20h 05m

Brussels Bruxelles-National

Thu 1/29

10:00 am-9:31 am

2 stops32h 31m

$469

SeattleBrussels

SEA - BRU

SEABRU

Seattle/Tacoma Intl

Thu 1/15

3:40 pm-8:00 pm

2 stops19h 20m

Brussels Bruxelles-National

Thu 1/29

10:00 am-10:06 pm

2 stops21h 06m

$472

SeattleBrussels

SEA - BRU

SEABRU

Seattle/Tacoma Intl

Thu 2/5

3:40 pm-8:00 pm

2 stops19h 20m

Brussels Bruxelles-National

Fri 2/13

10:00 am-10:16 pm

2 stops21h 16m

$473

PortlandBrussels

PDX - BRU

PDXBRU

Portland

Sun 1/25

11:59 pm-1:15 pm

2 stops28h 16m

Brussels Bruxelles-National

Sun 2/1

10:00 am-9:49 pm

2 stops20h 49m

$507

PortlandBrussels

PDX - BRU

PDXBRU

Portland

Sun 1/25

7:00 am-8:55 am

1 stop16h 55m

Brussels Bruxelles-National

Sun 2/1

10:00 am-9:49 pm

2 stops20h 49m

$511

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 State of Washington 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 State of Washington 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 State of Washington during the month September is also very affordable. Most momondo users find prices during this month for around $514.

What is the cheapest day to depart on your flight to Belgium?

Our data shows that Tuesday is the least expensive day to fly to Belgium. Tickets to fly out on this day can be as low as $626. If your travel schedule is flexible, try to avoid departing on a Wednesday because tickets tend to average around $783. These prices are subject to change though, so be sure to set up a Price Alert for flights to Belgium.

What is the cheapest time of day to depart on your flight to Belgium?

Our most recent data shows that the best time of day to fly to Belgium is in the morning. Flights from State of Washington to Belgium during this time can be as low as $668. Flights to Belgium are more costly at noon, with an average ticket price of $738. Departure times at noon fall within the peak daily travel times, which is why tickets can be more expensive.

How far in advance should I book a flight to Belgium?

You are more likely to see cheaper flights to Belgium from State of Washington when booking weeks ahead of your departure date. In general, you can expect to find flights to Belgium for around $628 when searching weeks out. However, flight prices might be lower outside of this timeframe. For example, people recently found flights to Belgium from State of Washington for as low as $537 on momondo.

Can stopping save me money on State of Washington to Belgium flights?

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

Cheap State of Washington to Belgium flight deals and tips

Find info about flight duration, direct flights, and airports for your flight from State of Washington to Belgium

Fastest flight time

12h 15m

Direct flights

None
The fastest flight from State of Washington to Belgium takes 12h 15m
There are no direct flights from State of Washington to Belgium. There are no popular flight routes from State of Washington to Belgium.
Search flight deals

  • When did momondo last update prices for flights from Washington to Belgium?

    Prices for flights from Washington to Belgium are refreshed on a daily basis.

  • How many operators does momondo search for flights from Washington to Belgium?

  • How old do you have to be to fly from Washington 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 Washington to Belgium.

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

    The necessary travel and health documents for your Belgium trip may vary depending on your travel plans and individual circumstances. Generally, you should have various documents, such as a national ID card or driver's license and a passport that is valid for six months beyond your scheduled arrival date. We recommend seeking advice from your airline or a trusted third party, such as IATA.

Best airlines flying from State of Washington to Belgium

Compare and see reviews for airlines that fly from State of Washington to Belgium with momondo
Airline
Rating
Free Cancellation
Price
IcelandairPriceFrom $387Free CancellationRating
7.0
589 reviews
Search Icelandair flights
DeltaPriceFrom $482Free CancellationRating
7.9
8,007 reviews
Search Delta flights
United AirlinesPriceFrom $483Free CancellationRating
7.4
9,094 reviews
Search United Airlines flights
Virgin AtlanticPriceFrom $488Free CancellationRating
7.5
675 reviews
Search Virgin Atlantic flights
LufthansaPriceFrom $501Free CancellationRating
6.8
7,626 reviews
Search Lufthansa flights
Air FrancePriceFrom $506Free CancellationRating
7.4
1,504 reviews
Search Air France flights
KLMPriceFrom $511Free CancellationRating
7.7
1,432 reviews
Search KLM flights
Air CanadaPriceFrom $518Free CancellationRating
7.1
10,517 reviews
Search Air Canada flights
British AirwaysPriceFrom $519Free CancellationRating
6.7
7,571 reviews
Search British Airways flights
Aer LingusPriceFrom $532Free CancellationRating
7.2
1,394 reviews
Search Aer Lingus flights

Why use momondo?

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

momondo collates all your flight options in one place and lets you filter them to find the perfect flight from Washington to Belgium. momondo saves you time and could save you money on your trip.

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

momondo does allow users to show only those flights to Belgium from Washington which offer a flexible booking policy as well as other useful filters and features.

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

Once all potential Washington to Belgium flight options are in front of you, momondo lets you sort and filter flights based on preferences such as airline, price and flight times amongst many other options.

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

Price alerts on flights to Belgium from Washington are quick and easy to set up on momondo. Simply perform a search and select the price alert feature. It is as simple as that.

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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