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Cheap flights from Washington to Belgium from $238

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 10/13. 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

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Find the cheapest flights from Washington to Belgium

Cheap round-trip flights

Enter your travel dates to find the best prices.
Icelandair Logo
7:00 pm - 12:55 pmSEA  Seattle/Tacoma Intl-BRU Brussels Bruxelles-National
32h 55m1 stop Reykjavik Keflavik Intl
Icelandair Logo
1:50 pm - 8:40 pmBRU  Brussels Bruxelles-National-SEA Seattle/Tacoma Intl
15h 50m1 stop Reykjavik Keflavik Intl
$554Icelandair
Sat, Oct 3 - Fri, Oct 16
Icelandair Logo
2:35 pm - 11:55 amSEA  Seattle/Tacoma Intl-BRU Brussels Bruxelles-National
12h 20m1 stop Reykjavik Keflavik Intl
Icelandair Logo
12:50 pm - 5:00 pmBRU  Brussels Bruxelles-National-SEA Seattle/Tacoma Intl
13h 10m1 stop Reykjavik Keflavik Intl
$557Icelandair
Wed, Dec 2 - Sun, Dec 13
Multiple Airlines Logo
8:00 am - 9:15 pmSEA  Seattle/Tacoma Intl-CRL Charleroi Brussels
28h 15m2 stops Toronto Pearson Intl Stockholm Arlanda
Multiple Airlines Logo
8:55 pm - 4:59 pmCRL  Charleroi Brussels-SEA Seattle/Tacoma Intl
29h 04m2 stops Stockholm Arlanda Munich Franz Josef Strauss
$650Multiple Airlines
Tue, Aug 25 - Sat, Sep 5
Scandinavian Airlines Logo
3:55 pm - 8:30 pmSEA  Seattle/Tacoma Intl-BRU Brussels Bruxelles-National
19h 35m2 stops Kastrup Copenhagen Oslo Gardermoen
Scandinavian Airlines Logo
11:20 am - 1:45 pmBRU  Brussels Bruxelles-National-SEA Seattle/Tacoma Intl
35h 25m2 stops Oslo Gardermoen Kastrup Copenhagen
$669Scandinavian Airlines
Tue, Sep 15 - Thu, Sep 24
Lufthansa Logo
2:50 pm - 1:10 pmSEA  Seattle/Tacoma Intl-BRU Brussels Bruxelles-National
13h 20m1 stop Munich Franz Josef Strauss
Lufthansa Logo
6:45 am - 1:00 pmBRU  Brussels Bruxelles-National-SEA Seattle/Tacoma Intl
15h 15m1 stop Munich Franz Josef Strauss
$707Lufthansa
Sun, Nov 1 - Fri, Dec 18
Lufthansa Logo
10:10 am - 7:50 amSEA  Seattle/Tacoma Intl-BRU Brussels Bruxelles-National
36h 40m2 stops Vancouver Intl Montreal Pierre Elliott Trudeau Intl
Lufthansa Logo
10:00 am - 9:27 amBRU  Brussels Bruxelles-National-SEA Seattle/Tacoma Intl
32h 27m2 stops Montreal Pierre Elliott Trudeau Intl Vancouver Intl
$707Lufthansa
Tue, Nov 3 - Tue, Nov 10
United Airlines Logo
11:00 am - 1:15 pmSEA  Seattle/Tacoma Intl-BRU Brussels Bruxelles-National
17h 15m2 stops Chicago O'Hare Intl London Heathrow
United Airlines Logo
7:00 am - 12:00 pmBRU  Brussels Bruxelles-National-SEA Seattle/Tacoma Intl
14h 00m1 stop Frankfurt am Main
$720United Airlines
Tue, Dec 1 - Thu, Dec 10
United Airlines Logo
10:56 pm - 1:15 pmSEA  Seattle/Tacoma Intl-BRU Brussels Bruxelles-National
29h 19m2 stops Chicago O'Hare Intl London Heathrow
United Airlines Logo
7:00 am - 12:00 pmBRU  Brussels Bruxelles-National-SEA Seattle/Tacoma Intl
14h 00m1 stop Frankfurt am Main
$720United Airlines
Mon, Nov 30 - Thu, Dec 10
Delta Logo
8:25 am - 11:00 amSEA  Seattle/Tacoma Intl-BRU Brussels Bruxelles-National
17h 35m1 stop Atlanta Hartsfield-Jackson
Delta Logo
12:55 pm - 11:59 pmBRU  Brussels Bruxelles-National-SEA Seattle/Tacoma Intl
20h 04m1 stop Atlanta Hartsfield-Jackson
$733Delta
Thu, Dec 3 - Fri, Dec 11
Delta Logo
6:00 am - 11:00 amSEA  Seattle/Tacoma Intl-BRU Brussels Bruxelles-National
20h 00m1 stop Atlanta Hartsfield-Jackson
Delta Logo
12:55 pm - 11:59 pmBRU  Brussels Bruxelles-National-SEA Seattle/Tacoma Intl
20h 04m1 stop Atlanta Hartsfield-Jackson
$739Delta
Thu, Dec 3 - Sun, Dec 13

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Icelandair flights from State of Washington to Belgium

Our best Icelandair deals on State of Washington to Belgium flight tickets
Icelandair
Oct 3
SEA7:00 pmSeattle/Tacoma Intl
32h 55m
1 stop
BRU12:55 pmBrussels Bruxelles-National
Oct 16
BRU1:50 pmBrussels Bruxelles-National
15h 50m
1 stop
SEA8:40 pmSeattle/Tacoma Intl
$554
Icelandair
Dec 2
SEA2:35 pmSeattle/Tacoma Intl
12h 20m
1 stop
BRU11:55 amBrussels Bruxelles-National
Dec 13
BRU12:50 pmBrussels Bruxelles-National
13h 10m
1 stop
SEA5:00 pmSeattle/Tacoma Intl
$557
Icelandair
Oct 11
SEA3:40 pmSeattle/Tacoma Intl
12h 15m
1 stop
BRU12:55 pmBrussels Bruxelles-National
Oct 24
BRU1:50 pmBrussels Bruxelles-National
13h 05m
1 stop
SEA5:55 pmSeattle/Tacoma Intl
$560

United Airlines flights from State of Washington to Belgium

Our best United Airlines deals on State of Washington to Belgium flight tickets
United Airlines
Nov 3
PDX8:40 amPortland
15h 15m
1 stop
BRU8:55 amBrussels Bruxelles-National
Nov 13
BRU10:10 amBrussels Bruxelles-National
21h 17m
1 stop
PDX10:27 pmPortland
$767
United Airlines
Jan 15
PDX10:56 pmPortland
47h 54m
2 stops
BRU7:50 amBrussels Bruxelles-National
Jan 22
BRU11:15 amBrussels Bruxelles-National
19h 06m
1 stop
PDX9:21 pmPortland
$787
United Airlines
Oct 6
PDX7:45 pmPortland
39h 15m
2 stops
BRU8:00 pmBrussels Bruxelles-National
Oct 16
BRU9:10 amBrussels Bruxelles-National
38h 55m
2 stops
PDX3:05 pmPortland
$799

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 August 11, 2026.
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

Cheapest round-trip

SeattleBrussels

SEA Seattle/Tacoma Intl - BRU Brussels Bruxelles-National

SEABRU

Seattle/Tacoma Intl

Sat 10/3

7:00 pm-12:55 pm

1 stop32h 55m

Brussels Bruxelles-National

Fri 10/16

1:50 pm-8:40 pm

1 stop15h 50m

$554
Quickest round-trip

SeattleBrussels

SEA Seattle/Tacoma Intl - BRU Brussels Bruxelles-National

SEABRU

Seattle/Tacoma Intl

Wed 12/2

2:35 pm-11:55 am

1 stop12h 20m

Brussels Bruxelles-National

Sun 12/13

12:50 pm-5:00 pm

1 stop13h 10m

$557

SeattleBrussels

SEA Seattle/Tacoma Intl - CRL Charleroi Brussels

SEACRL

Seattle/Tacoma Intl

Tue 8/25

8:00 am-9:15 pm

2 stops28h 15m

Charleroi Brussels

Sat 9/5

8:55 pm-4:59 pm

2 stops29h 04m

$650

SeattleBrussels

SEA Seattle/Tacoma Intl - BRU Brussels Bruxelles-National

SEABRU

Seattle/Tacoma Intl

Tue 9/15

3:55 pm-8:30 pm

2 stops19h 35m

Brussels Bruxelles-National

Thu 9/24

11:20 am-1:45 pm

2 stops35h 25m

$669

SeattleBrussels

SEA Seattle/Tacoma Intl - BRU Brussels Bruxelles-National

SEABRU

Seattle/Tacoma Intl

Sun 11/1

2:50 pm-1:10 pm

1 stop13h 20m

Brussels Bruxelles-National

Fri 12/18

6:45 am-1:00 pm

1 stop15h 15m

$707

SeattleBrussels

SEA Seattle/Tacoma Intl - BRU Brussels Bruxelles-National

SEABRU

Seattle/Tacoma Intl

Tue 11/3

10:10 am-7:50 am

2 stops36h 40m

Brussels Bruxelles-National

Tue 11/10

10:00 am-9:27 am

2 stops32h 27m

$707

SeattleBrussels

SEA Seattle/Tacoma Intl - BRU Brussels Bruxelles-National

SEABRU

Seattle/Tacoma Intl

Tue 12/1

11:00 am-1:15 pm

2 stops17h 15m

Brussels Bruxelles-National

Thu 12/10

7:00 am-12:00 pm

1 stop14h 00m

$720

SeattleBrussels

SEA Seattle/Tacoma Intl - BRU Brussels Bruxelles-National

SEABRU

Seattle/Tacoma Intl

Mon 11/30

10:56 pm-1:15 pm

2 stops29h 19m

Brussels Bruxelles-National

Thu 12/10

7:00 am-12:00 pm

1 stop14h 00m

$720

SeattleBrussels

SEA Seattle/Tacoma Intl - BRU Brussels Bruxelles-National

SEABRU

Seattle/Tacoma Intl

Thu 12/3

8:25 am-11:00 am

1 stop17h 35m

Brussels Bruxelles-National

Fri 12/11

12:55 pm-11:59 pm

1 stop20h 04m

$733

SeattleBrussels

SEA Seattle/Tacoma Intl - BRU Brussels Bruxelles-National

SEABRU

Seattle/Tacoma Intl

Thu 12/3

6:00 am-11:00 am

1 stop20h 00m

Brussels Bruxelles-National

Sun 12/13

12:55 pm-11:59 pm

1 stop20h 04m

$739

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, January 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 $510. If you are unable to visit Belgium during the month of January, then departing from State of Washington 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 Washington 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 $702 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 $503 on momondo.

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

You could potentially save up to 23% 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

Frequently asked questions about flying from Washington to Belgium

  • 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 $382Free CancellationRating
6.9
728 reviews
Search Icelandair flights
British AirwaysPriceFrom $421Free CancellationRating
6.7
8,155 reviews
Search British Airways flights
KLMPriceFrom $481Free CancellationRating
7.8
1,555 reviews
Search KLM flights
LufthansaPriceFrom $494Free CancellationRating
6.8
8,174 reviews
Search Lufthansa flights
United AirlinesPriceFrom $502Free CancellationRating
7.4
10,100 reviews
Search United Airlines flights
DeltaPriceFrom $509Free CancellationRating
7.8
8,500 reviews
Search Delta 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.

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