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Cheap flights from Washington to Belgium from $309

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 9/17. Fares may change, and may not be available for all flights or travel dates. Click the price to refresh the search for this deal.
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0 bags

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Find the cheapest flights from Washington to Belgium

Cheap round-trip flights

Icelandair Logo
3:45 pm - 12:50 pmSEA-BRU
12h 05m1 stop
Icelandair Logo
1:50 pm - 8:40 pmBRU-SEA
15h 50m1 stop
$428Icelandair
Find Deal
Fri, Oct 10 - Mon, Oct 20
Icelandair Logo
7:00 pm - 12:50 pmSEA-BRU
32h 50m1 stop
Icelandair Logo
1:50 pm - 11:25 amBRU-SEA
30h 35m1 stop
$433Icelandair
Find Deal
Fri, Aug 22 - Mon, Sep 1
Virgin Atlantic Logo
9:55 pm - 9:00 amSEA-BRU
26h 05m1 stop
Virgin Atlantic Logo
11:00 am - 7:29 pmBRU-SEA
17h 29m1 stop
$474Virgin Atlantic
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Sat, Nov 8 - Sat, Nov 15
Virgin Atlantic Logo
11:15 am - 9:00 amSEA-BRU
36h 45m1 stop
Virgin Atlantic Logo
11:00 am - 11:34 pmBRU-SEA
21h 34m2 stops
$479Virgin Atlantic
Find Deal
Sat, Nov 8 - Sat, Nov 15
United Airlines Logo
7:12 am - 8:05 amSEA-BRU
15h 53m1 stop
United Airlines Logo
10:00 am - 11:40 amBRU-SEA
34h 40m2 stops
$483United Airlines
Find Deal
Mon, Jan 19 - Thu, Jan 29
Air Canada Logo
5:30 am - 8:05 amSEA-BRU
17h 35m2 stops
Air Canada Logo
10:00 am - 6:36 pmBRU-SEA
17h 36m2 stops
$493Air Canada
Find Deal
Mon, Sep 1 - Tue, Sep 16
Air Canada Logo
7:20 am - 8:05 amSEA-BRU
15h 45m1 stop
Air Canada Logo
10:00 am - 6:36 pmBRU-SEA
17h 36m2 stops
$498Air Canada
Find Deal
Mon, Sep 1 - Tue, Sep 16
Logo
12:00 pm - 1:15 pmSEA-BRU
16h 15m2 stops
Logo
10:00 am - 6:36 pmBRU-SEA
17h 36m2 stops
$504
Find Deal
Wed, Sep 10 - Thu, Sep 18
United Airlines Logo
8:00 am - 7:15 amSEA-BRU
14h 15m1 stop
United Airlines Logo
11:55 am - 8:10 pmBRU-SEA
17h 15m1 stop
$506United Airlines
Find Deal
Mon, Jan 19 - Thu, Jan 29
Logo
5:30 am - 8:05 amSEA-BRU
17h 35m2 stops
Logo
10:00 am - 2:16 pmBRU-SEA
37h 16m2 stops
$507
Find Deal
Tue, Sep 2 - Tue, Sep 9

British Airways flights from State of Washington to Belgium

Our best British Airways deals on State of Washington to Belgium flight tickets
British Airways
Sep 18
SEA3:40 pmSeattle/Tacoma Intl
18h 10m
2 stops
BRU6:50 pmBrussels Bruxelles-National
Sep 25
BRU10:50 amBrussels Bruxelles-National
16h 30m
1 stop
SEA6:20 pmSeattle/Tacoma Intl
$597
Find similar
British Airways
Aug 16
PDX7:25 pmPortland
29h 30m
1 stop
BRU9:55 amBrussels Bruxelles-National
Aug 22
BRU2:55 pmBrussels Bruxelles-National
34h 52m
2 stops
PDX4:47 pmPortland
$1,061
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Scandinavian Airlines flights from State of Washington to Belgium

Our best Scandinavian Airlines deals on State of Washington to Belgium flight tickets
Scandinavian Airlines
Oct 1
PDX10:20 amPortland
24h 30m
2 stops
BRU7:50 pmBrussels Bruxelles-National
Oct 9
BRU10:20 amBrussels Bruxelles-National
21h 33m
2 stops
PDX10:53 pmPortland
$680
Find similar
Scandinavian Airlines
Oct 9
PDX12:39 pmPortland
22h 11m
3 stops
BRU7:50 pmBrussels Bruxelles-National
Oct 13
BRU10:20 amBrussels Bruxelles-National
21h 33m
2 stops
PDX10:53 pmPortland
$775
Find similar
Scandinavian Airlines
Aug 16
PDX12:35 pmPortland
22h 15m
2 stops
BRU7:50 pmBrussels Bruxelles-National
Aug 21
BRU8:30 pmBrussels Bruxelles-National
31h 15m
2 stops
PDX6:45 pmPortland
$1,118
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 August 6, 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

Fri 10/10

3:45 pm-12:50 pm

1 stop12h 05m

Brussels Bruxelles-National

Mon 10/20

1:50 pm-8:40 pm

1 stop15h 50m

$428

SeattleBrussels

SEA - BRU

SEABRU

Seattle/Tacoma Intl

Fri 8/22

7:00 pm-12:50 pm

1 stop32h 50m

Brussels Bruxelles-National

Mon 9/1

1:50 pm-11:25 am

1 stop30h 35m

$433

SeattleBrussels

SEA - BRU

SEABRU

Seattle/Tacoma Intl

Sat 11/8

9:55 pm-9:00 am

1 stop26h 05m

Brussels Bruxelles-National

Sat 11/15

11:00 am-7:29 pm

1 stop17h 29m

$474

SeattleBrussels

SEA - BRU

SEABRU

Seattle/Tacoma Intl

Sat 11/8

11:15 am-9:00 am

1 stop36h 45m

Brussels Bruxelles-National

Sat 11/15

11:00 am-11:34 pm

2 stops21h 34m

$479

SeattleBrussels

SEA - BRU

SEABRU

Seattle/Tacoma Intl

Mon 1/19

7:12 am-8:05 am

1 stop15h 53m

Brussels Bruxelles-National

Thu 1/29

10:00 am-11:40 am

2 stops34h 40m

$483

SeattleBrussels

SEA - BRU

SEABRU

Seattle/Tacoma Intl

Mon 9/1

5:30 am-8:05 am

2 stops17h 35m

Brussels Bruxelles-National

Tue 9/16

10:00 am-6:36 pm

2 stops17h 36m

$493

SeattleBrussels

SEA - BRU

SEABRU

Seattle/Tacoma Intl

Mon 9/1

7:20 am-8:05 am

1 stop15h 45m

Brussels Bruxelles-National

Tue 9/16

10:00 am-6:36 pm

2 stops17h 36m

$498

SeattleBrussels

SEA - BRU

SEABRU

Seattle/Tacoma Intl

Wed 9/10

12:00 pm-1:15 pm

2 stops16h 15m

Brussels Bruxelles-National

Thu 9/18

10:00 am-6:36 pm

2 stops17h 36m

$504

SeattleBrussels

SEA - BRU

SEABRU

Seattle/Tacoma Intl

Mon 1/19

8:00 am-7:15 am

1 stop14h 15m

Brussels Bruxelles-National

Thu 1/29

11:55 am-8:10 pm

1 stop17h 15m

$506

SeattleBrussels

SEA - BRU

SEABRU

Seattle/Tacoma Intl

Tue 9/2

5:30 am-8:05 am

2 stops17h 35m

Brussels Bruxelles-National

Tue 9/9

10:00 am-2:16 pm

2 stops37h 16m

$507

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, November 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 $528. If you are unable to visit Belgium during the month of November, then departing from State of Washington during the month September is also very affordable. Most momondo users find prices during this month for around $533.

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 $620 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 $517 on momondo.

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

You could potentially save up to 53% 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

Best Price Found

$309

Fastest flight time

11h 45m

Direct flights

None

Airports in Belgium

2 airports
The best one-way flight to Belgium from State of Washington in the past 72 hours is $309. The best round-trip flight deal from State of Washington to Belgium found on momondo in the last 72 hours is $428.
The fastest flight from State of Washington to Belgium takes 11h 45m
There are no direct flights from State of Washington to Belgium. Popular non-direct routes for this connection are Seattle/Tacoma Intl Airport - Brussels Bruxelles-National Airport, Seattle/Tacoma Intl Airport - Charleroi Brussels Airport and Portland Airport - Brussels Bruxelles-National Airport.
There are 2 airports near Belgium: Brussels Bruxelles-National (BRU), Charleroi Brussels (CRL)
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  • 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 $389Free CancellationRating
7.0
524 reviews
Search Icelandair flights
Virgin AtlanticPriceFrom $491Free CancellationRating
7.4
657 reviews
Search Virgin Atlantic flights
American AirlinesPriceFrom $501Free CancellationRating
7.2
10,000 reviews
Search American Airlines flights
British AirwaysPriceFrom $501Free CancellationRating
6.6
7,245 reviews
Search British Airways flights
KLMPriceFrom $511Free CancellationRating
7.8
1,381 reviews
Search KLM flights
DeltaPriceFrom $514Free CancellationRating
8.0
7,985 reviews
Search Delta flights
United AirlinesPriceFrom $522Free CancellationRating
7.4
8,917 reviews
Search United Airlines flights
Aer LingusPriceFrom $532Free CancellationRating
7.1
1,201 reviews
Search Aer Lingus flights
Air CanadaPriceFrom $543Free CancellationRating
7.1
9,893 reviews
Search Air Canada flights
Air FrancePriceFrom $554Free CancellationRating
7.4
1,465 reviews
Search Air France 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

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