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Cheap flights from Washington to Belgium from $255

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 10/18. 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 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
$400Icelandair
Find Deal
Sun, Oct 12 - Fri, Oct 24
Icelandair Logo
2:35 pm - 11:55 amSEA-BRU
12h 20m1 stop
Icelandair Logo
12:50 pm - 5:00 pmBRU-SEA
13h 10m1 stop
$409Icelandair
Find Deal
Wed, Jan 21 - Sun, Jan 25
United Airlines Logo
5:00 am - 7:15 amSEA-BRU
17h 15m2 stops
United Airlines Logo
10:00 am - 11:40 amBRU-SEA
33h 40m2 stops
$435United Airlines
Find Deal
Tue, Feb 10 - Tue, Mar 10
United Airlines Logo
7:00 am - 8:05 amSEA-BRU
16h 05m2 stops
United Airlines Logo
10:00 am - 11:28 amBRU-SEA
34h 28m2 stops
$439United Airlines
Find Deal
Wed, Nov 12 - Tue, Nov 18
Multiple Airlines Logo
5:50 am - 7:50 amSEA-BRU
17h 00m2 stops
Multiple Airlines Logo
10:00 am - 7:16 pmBRU-SEA
18h 16m2 stops
$443Multiple Airlines
Find Deal
Wed, Nov 5 - Tue, Nov 18
Air Canada Logo
5:30 am - 8:05 amSEA-BRU
17h 35m2 stops
Air Canada Logo
10:00 am - 7:16 pmBRU-SEA
18h 16m2 stops
$456Air Canada
Find Deal
Thu, Oct 23 - Thu, Nov 6
Multiple Airlines Logo
7:15 am - 8:05 amSEA-BRU
15h 50m1 stop
Multiple Airlines Logo
9:40 am - 6:36 pmBRU-SEA
17h 56m2 stops
$472Multiple Airlines
Find Deal
Wed, Oct 8 - Wed, Oct 15
Air Canada Logo
5:30 am - 8:05 amSEA-BRU
17h 35m2 stops
Air Canada Logo
10:00 am - 9:45 pmBRU-SEA
20h 45m2 stops
$479Air Canada
Find Deal
Wed, Oct 8 - Wed, Oct 15
Delta Logo
7:25 am - 8:40 amSEA-BRU
16h 15m1 stop
Delta Logo
11:00 am - 10:18 amBRU-SEA
32h 18m1 stop
$500Delta
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Thu, Oct 23 - Thu, Nov 6
Delta Logo
7:25 am - 8:40 amSEA-BRU
16h 15m1 stop
Delta Logo
11:00 am - 10:18 amBRU-SEA
32h 18m1 stop
$502Delta
Find Deal
Thu, Oct 23 - Thu, Nov 6

Delta flights from State of Washington to Belgium

Our best Delta deals on State of Washington to Belgium flight tickets
Delta
Oct 23
SEA7:25 amSeattle/Tacoma Intl
16h 15m
1 stop
BRU8:40 amBrussels Bruxelles-National
Nov 6
BRU11:00 amBrussels Bruxelles-National
32h 18m
1 stop
SEA10:18 amSeattle/Tacoma Intl
$500
Find similar
Delta
Oct 23
SEA7:25 amSeattle/Tacoma Intl
16h 15m
1 stop
BRU8:40 amBrussels Bruxelles-National
Nov 6
BRU11:00 amBrussels Bruxelles-National
32h 18m
1 stop
SEA10:18 amSeattle/Tacoma Intl
$502
Find similar
Delta
Oct 13
PDX7:12 amPortland
16h 28m
1 stop
BRU8:40 amBrussels Bruxelles-National
Oct 24
BRU8:00 amBrussels Bruxelles-National
12h 05m
1 stop
PDX11:05 amPortland
$617
Find similar

Air Canada flights from State of Washington to Belgium

Our best Air Canada deals on State of Washington to Belgium flight tickets
Air Canada
Oct 23
SEA5:30 amSeattle/Tacoma Intl
17h 35m
2 stops
BRU8:05 amBrussels Bruxelles-National
Nov 6
BRU10:00 amBrussels Bruxelles-National
18h 16m
2 stops
SEA7:16 pmSeattle/Tacoma Intl
$456
Find similar
Air Canada
Oct 8
SEA5:30 amSeattle/Tacoma Intl
17h 35m
2 stops
BRU8:05 amBrussels Bruxelles-National
Oct 15
BRU10:00 amBrussels Bruxelles-National
20h 45m
2 stops
SEA9:45 pmSeattle/Tacoma Intl
$479
Find similar
Air Canada
Jan 18
SEA5:50 amSeattle/Tacoma Intl
17h 00m
2 stops
BRU7:50 amBrussels Bruxelles-National
Jan 29
BRU10:00 amBrussels Bruxelles-National
18h 16m
2 stops
SEA7:16 pmSeattle/Tacoma Intl
$493
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 September 18, 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

Sun 10/12

3:45 pm-12:50 pm

1 stop12h 05m

Brussels Bruxelles-National

Fri 10/24

1:50 pm-8:40 pm

1 stop15h 50m

$400

SeattleBrussels

SEA - BRU

SEABRU

Seattle/Tacoma Intl

Wed 1/21

2:35 pm-11:55 am

1 stop12h 20m

Brussels Bruxelles-National

Sun 1/25

12:50 pm-5:00 pm

1 stop13h 10m

$409

SeattleBrussels

SEA - BRU

SEABRU

Seattle/Tacoma Intl

Tue 2/10

5:00 am-7:15 am

2 stops17h 15m

Brussels Bruxelles-National

Tue 3/10

10:00 am-11:40 am

2 stops33h 40m

$435

SeattleBrussels

SEA - BRU

SEABRU

Seattle/Tacoma Intl

Wed 11/12

7:00 am-8:05 am

2 stops16h 05m

Brussels Bruxelles-National

Tue 11/18

10:00 am-11:28 am

2 stops34h 28m

$439

SeattleBrussels

SEA - BRU

SEABRU

Seattle/Tacoma Intl

Wed 11/5

5:50 am-7:50 am

2 stops17h 00m

Brussels Bruxelles-National

Tue 11/18

10:00 am-7:16 pm

2 stops18h 16m

$443

SeattleBrussels

SEA - BRU

SEABRU

Seattle/Tacoma Intl

Thu 10/23

5:30 am-8:05 am

2 stops17h 35m

Brussels Bruxelles-National

Thu 11/6

10:00 am-7:16 pm

2 stops18h 16m

$456

SeattleBrussels

SEA - BRU

SEABRU

Seattle/Tacoma Intl

Wed 10/8

7:15 am-8:05 am

1 stop15h 50m

Brussels Bruxelles-National

Wed 10/15

9:40 am-6:36 pm

2 stops17h 56m

$472

SeattleBrussels

SEA - BRU

SEABRU

Seattle/Tacoma Intl

Wed 10/8

5:30 am-8:05 am

2 stops17h 35m

Brussels Bruxelles-National

Wed 10/15

10:00 am-9:45 pm

2 stops20h 45m

$479

SeattleBrussels

SEA - BRU

SEABRU

Seattle/Tacoma Intl

Thu 10/23

7:25 am-8:40 am

1 stop16h 15m

Brussels Bruxelles-National

Thu 11/6

11:00 am-10:18 am

1 stop32h 18m

$500

SeattleBrussels

SEA - BRU

SEABRU

Seattle/Tacoma Intl

Thu 10/23

7:25 am-8:40 am

1 stop16h 15m

Brussels Bruxelles-National

Thu 11/6

11:00 am-10:18 am

1 stop32h 18m

$502

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, September 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 $527. If you are unable to visit Belgium during the month of September, then departing from State of Washington during the month October 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 $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 $513 on momondo.

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

Direct flights

None
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 $391Free CancellationRating
7.0
545 reviews
Search Icelandair flights
United AirlinesPriceFrom $483Free CancellationRating
7.4
8,926 reviews
Search United Airlines flights
Virgin AtlanticPriceFrom $488Free CancellationRating
7.4
664 reviews
Search Virgin Atlantic flights
British AirwaysPriceFrom $502Free CancellationRating
6.7
7,373 reviews
Search British Airways flights
Air FrancePriceFrom $506Free CancellationRating
7.4
1,468 reviews
Search Air France flights
KLMPriceFrom $511Free CancellationRating
7.8
1,386 reviews
Search KLM flights
DeltaPriceFrom $514Free CancellationRating
7.9
7,964 reviews
Search Delta flights
Aer LingusPriceFrom $532Free CancellationRating
7.2
1,281 reviews
Search Aer Lingus flights
Air CanadaPriceFrom $543Free CancellationRating
7.1
10,000 reviews
Search Air Canada flights
LufthansaPriceFrom $561Free CancellationRating
6.8
7,415 reviews
Search Lufthansa 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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