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Cheap flights from Washington to Brussels from $355

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 Brussels departing on 11/4. 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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Cheap round-trip flights

Enter your travel dates to find the best prices.
Icelandair Logo
2:35 pm - 11:55 amSEA-BRU
12h 20m1 stop
Icelandair Logo
12:50 pm - 5:00 pmBRU-SEA
13h 10m1 stop
$391Icelandair
Find Deal
Wed, Nov 5 - Thu, Nov 13
Icelandair Logo
2:35 pm - 11:55 amSEA-BRU
12h 20m1 stop
Icelandair Logo
12:50 pm - 5:00 pmBRU-SEA
13h 10m1 stop
$393Icelandair
Find Deal
Wed, Nov 5 - Thu, Nov 13
Multiple Airlines Logo
3:40 pm - 8:00 pmSEA-BRU
19h 20m2 stops
Multiple Airlines Logo
10:00 am - 10:06 pmBRU-SEA
21h 06m2 stops
$468Multiple Airlines
Find Deal
Wed, Nov 5 - Thu, Nov 13
Multiple Airlines Logo
3:40 pm - 8:55 amSEA-BRU
32h 15m2 stops
Multiple Airlines Logo
10:00 am - 7:16 pmBRU-SEA
18h 16m2 stops
$471Multiple Airlines
Find Deal
Tue, Nov 25 - Tue, Dec 2
United Airlines Logo
7:00 am - 1:15 pmSEA-BRU
21h 15m2 stops
United Airlines Logo
10:00 am - 11:40 amBRU-SEA
33h 40m2 stops
$482United Airlines
Find Deal
Tue, Feb 10 - Tue, Mar 10
Lufthansa Logo
10:05 am - 1:10 pmSEA-BRU
18h 05m2 stops
Lufthansa Logo
7:00 am - 11:55 amBRU-SEA
13h 55m1 stop
$484Lufthansa
Find Deal
Tue, Mar 3 - Tue, Mar 31
United Airlines Logo
8:00 am - 7:15 amSEA-BRU
14h 15m1 stop
United Airlines Logo
10:00 am - 6:52 pmBRU-SEA
41h 52m2 stops
$485United Airlines
Find Deal
Wed, Nov 5 - Thu, Nov 13
Lufthansa Logo
3:10 pm - 1:10 pmSEA-BRU
13h 00m1 stop
Lufthansa Logo
9:05 am - 1:20 pmBRU-SEA
13h 15m1 stop
$489Lufthansa
Find Deal
Wed, Nov 5 - Wed, Nov 19
British Airways Logo
6:50 pm - 4:40 pmSEA-BRU
12h 50m1 stop
British Airways Logo
8:45 pm - 11:30 amBRU-SEA
23h 45m1 stop
$511British Airways
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Mon, Nov 3 - Mon, Nov 10
British Airways Logo
6:50 pm - 8:45 amSEA-BRU
28h 55m1 stop
British Airways Logo
7:25 pm - 4:55 pmBRU-SEA
30h 30m1 stop
$545British Airways
Find Deal
Thu, Jan 1 - Sat, Jan 31

Icelandair flights from State of Washington to Brussels

Our best Icelandair deals on State of Washington to Brussels flight tickets
Icelandair
Nov 5
SEA2:35 pmSeattle/Tacoma Intl
12h 20m
1 stop
BRU11:55 amBrussels Bruxelles-National
Nov 13
BRU12:50 pmBrussels Bruxelles-National
13h 10m
1 stop
SEA5:00 pmSeattle/Tacoma Intl
$391
Find similar
Icelandair
Nov 5
SEA2:35 pmSeattle/Tacoma Intl
12h 20m
1 stop
BRU11:55 amBrussels Bruxelles-National
Nov 13
BRU12:50 pmBrussels Bruxelles-National
13h 10m
1 stop
SEA5:00 pmSeattle/Tacoma Intl
$393
Find similar
Icelandair
Nov 20
SEA2:35 pmSeattle/Tacoma Intl
12h 20m
1 stop
BRU11:55 amBrussels Bruxelles-National
Nov 27
BRU12:50 pmBrussels Bruxelles-National
13h 10m
1 stop
SEA5:00 pmSeattle/Tacoma Intl
$437
Find similar

Lufthansa flights from State of Washington to Brussels

Our best Lufthansa deals on State of Washington to Brussels flight tickets
Lufthansa
Mar 3
SEA10:05 amSeattle/Tacoma Intl
18h 05m
2 stops
BRU1:10 pmBrussels Bruxelles-National
Mar 31
BRU7:00 amBrussels Bruxelles-National
13h 55m
1 stop
SEA11:55 amSeattle/Tacoma Intl
$484
Find similar
Lufthansa
Nov 5
SEA3:10 pmSeattle/Tacoma Intl
13h 00m
1 stop
BRU1:10 pmBrussels Bruxelles-National
Nov 19
BRU9:05 amBrussels Bruxelles-National
13h 15m
1 stop
SEA1:20 pmSeattle/Tacoma Intl
$489
Find similar
Lufthansa
Mar 3
SEA2:00 pmSeattle/Tacoma Intl
13h 35m
1 stop
BRU12:35 pmBrussels Bruxelles-National
Apr 1
BRU8:30 amBrussels Bruxelles-National
12h 25m
1 stop
SEA11:55 amSeattle/Tacoma Intl
$493
Find similar

momondo Fare Finder

 
Customize your flight search to find flights from State of Washington to Brussels 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 October 8, 2025.
Use the filters below to find and compare flights from Washington to Brussels that are best for you.

Fly from

Fly to

Route

Depart

Return

Price

SeattleBrussels

SEA - BRU

SEABRU

Seattle/Tacoma Intl

Wed 11/5

2:35 pm-11:55 am

1 stop12h 20m

Brussels Bruxelles-National

Thu 11/13

12:50 pm-5:00 pm

1 stop13h 10m

$391

SeattleBrussels

SEA - BRU

SEABRU

Seattle/Tacoma Intl

Wed 11/5

2:35 pm-11:55 am

1 stop12h 20m

Brussels Bruxelles-National

Thu 11/13

12:50 pm-5:00 pm

1 stop13h 10m

$393

SeattleBrussels

SEA - BRU

SEABRU

Seattle/Tacoma Intl

Wed 11/5

3:40 pm-8:00 pm

2 stops19h 20m

Brussels Bruxelles-National

Thu 11/13

10:00 am-10:06 pm

2 stops21h 06m

$468

SeattleBrussels

SEA - BRU

SEABRU

Seattle/Tacoma Intl

Tue 11/25

3:40 pm-8:55 am

2 stops32h 15m

Brussels Bruxelles-National

Tue 12/2

10:00 am-7:16 pm

2 stops18h 16m

$471

SeattleBrussels

SEA - BRU

SEABRU

Seattle/Tacoma Intl

Tue 2/10

7:00 am-1:15 pm

2 stops21h 15m

Brussels Bruxelles-National

Tue 3/10

10:00 am-11:40 am

2 stops33h 40m

$482

SeattleBrussels

SEA - BRU

SEABRU

Seattle/Tacoma Intl

Tue 3/3

10:05 am-1:10 pm

2 stops18h 05m

Brussels Bruxelles-National

Tue 3/31

7:00 am-11:55 am

1 stop13h 55m

$484

SeattleBrussels

SEA - BRU

SEABRU

Seattle/Tacoma Intl

Wed 11/5

8:00 am-7:15 am

1 stop14h 15m

Brussels Bruxelles-National

Thu 11/13

10:00 am-6:52 pm

2 stops41h 52m

$485

SeattleBrussels

SEA - BRU

SEABRU

Seattle/Tacoma Intl

Wed 11/5

3:10 pm-1:10 pm

1 stop13h 00m

Brussels Bruxelles-National

Wed 11/19

9:05 am-1:20 pm

1 stop13h 15m

$489

SeattleBrussels

SEA - BRU

SEABRU

Seattle/Tacoma Intl

Mon 11/3

6:50 pm-4:40 pm

1 stop12h 50m

Brussels Bruxelles-National

Mon 11/10

8:45 pm-11:30 am

1 stop23h 45m

$511

SeattleBrussels

SEA - BRU

SEABRU

Seattle/Tacoma Intl

Thu 1/1

6:50 pm-8:45 am

1 stop28h 55m

Brussels Bruxelles-National

Sat 1/31

7:25 pm-4:55 pm

1 stop30h 30m

$545

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 Brussels from

How to get the cheapest flight ticket from State of Washington to Brussels

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 Brussels?

In general, October is the cheapest month to fly from State of Washington to Brussels. Due to it being the ‘off-season’ during this time, you can expect flight prices to be around $463. If you are unable to visit Brussels 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 $518.

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

On average, the least expensive day to fly to Brussels from State of Washington is on a Tuesday. momondo users have found tickets for Tuesday departures for as low as $626. However, this price may fluctuate depending on the airline, the season, and holidays. On the other hand, Wednesday is the most expensive day to depart from State of Washington because it is more convenient for both business and leisure travelers. As a result, prices tend to be around $783.

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

According to our data, the cheapest time of day to fly to Brussels is in the morning. momondo users have found flights departing from State of Washington to Brussels in the morning for as low as $668. Keep in mind that these prices may fluctuate based on what airline you choose and the time of year you plan to travel. Flights at noon are often more expensive with an average ticket price of $738.

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

You are more likely to see cheaper flights to Brussels from State of Washington when booking weeks ahead of your departure date. In general, you can expect to find flights to Brussels for around $624 when searching weeks out. However, flight prices might be lower outside of this timeframe. For example, people recently found flights to Brussels from State of Washington for as low as $524 on momondo.

Cheap State of Washington to Brussels flight deals and tips

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

Direct flights

None
There are no direct flights from State of Washington to Brussels. There are no popular flight routes from State of Washington to Brussels.
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  • When did momondo last update prices for flights from Washington to Brussels?

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

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

  • How old do you have to be to fly from Washington to Brussels?

    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 Brussels.

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

    The travel and health documents you'll need for your trip to Brussels may differ based on your itinerary and personal situation. Typically, you should have several documents on hand, such as a national ID card or driver's license and a passport that is valid for six months after your intended arrival at Brussels. It is always advisable to seek advice from your airline or a trusted third party, such as IATA.

Best airlines flying from State of Washington to Brussels

Compare and see reviews for airlines that fly from State of Washington to Brussels with momondo
Airline
Rating
Free Cancellation
Price
IcelandairPriceFrom $391Free CancellationRating
7.0
551 reviews
Search Icelandair flights
United AirlinesPriceFrom $483Free CancellationRating
7.4
8,963 reviews
Search United Airlines flights
Virgin AtlanticPriceFrom $488Free CancellationRating
7.4
665 reviews
Search Virgin Atlantic flights
British AirwaysPriceFrom $503Free CancellationRating
6.7
7,440 reviews
Search British Airways flights
Air FrancePriceFrom $506Free CancellationRating
7.4
1,467 reviews
Search Air France flights
KLMPriceFrom $511Free CancellationRating
7.7
1,396 reviews
Search KLM flights
DeltaPriceFrom $514Free CancellationRating
7.9
7,969 reviews
Search Delta flights
Aer LingusPriceFrom $532Free CancellationRating
7.2
1,319 reviews
Search Aer Lingus flights
Air CanadaPriceFrom $556Free CancellationRating
7.1
10,253 reviews
Search Air Canada flights
LufthansaPriceFrom $561Free CancellationRating
6.8
7,458 reviews
Search Lufthansa flights

Why use momondo?

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

To find the flight that best suits your needs, momondo gathers a range of flights from a large pool of different airlines and agents; you can then use our insights and filters to find and book the right flight to Brussels from Washington.

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

Yes. All flights to Brussels from Washington on momondo can be compared and filtered by various policies on offer, including flexible booking.

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

momondo provides multiple filters to help you find the best flight to Brussels from Washington. Filter by price, airline, airports, cabin, aircraft, payment method, number of stops and more.

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

If you are not ready to book a flight from Washington to Brussels now, use our insights above to find helpful tips or alternatively set up a price alert, where momondo will track prices on flights to Brussels and let you know when they change.

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Find better results for your trip to Belgium

Fly into one of these airports located in Brussels

Airports listed have a maximum distance of 27.4 mi from Brussels
Brussels Bruxelles-National Airport
Charleroi Brussels Airport