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$230+ Cheap flights from Washington to Belgium

This is the cheapest one-way flight price found by a Cheapflights user in the last 72 hours by searching for a flight departing on 3/27. Fares are subject to change and may not be available on all flights or dates of travel.
SEA — BRU
Feb 28 — Mar 71
Sat 2/28
Sat 3/7
1 adult, Economy
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Cheap flight deals from Washington to Belgium

Cheapest flights from Washington to Belgium
Explore the most affordable flight options available from Washington to Belgium. Find the lowest fares from popular airlines and budget airlines, with prices last updated on January 29, 2026.

This Flightnetwork deal was found by Cheapflights users on 1/27. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Flightnetwork is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Sat 3/72:45 pm
PDX
-
BRU
1 stop12h 10m
Icelandair
Fri 3/2012:50 pm
BRU
-
PDX
1 stop13h 10m
Icelandair
Deal found 1/27$386
This oojo deal was found by Cheapflights users on 1/28. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure oojo is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Thu 5/73:40 pm
SEA
-
BRU
1 stop12h 15m
Icelandair
Fri 5/151:50 pm
BRU
-
SEA
1 stop15h 50m
Icelandair
Deal found 1/28$407
This oojo deal was found by Cheapflights users on 1/28. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure oojo is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Fri 5/17:00 pm
SEA
-
BRU
1 stop32h 55m
Icelandair
Sun 5/101:50 pm
BRU
-
SEA
1 stop13h 05m
Icelandair
Deal found 1/28$408
This Cheapflightsfares deal was found by Cheapflights users on 1/27. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Cheapflightsfares is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Wed 4/223:40 pm
SEA
-
BRU
1 stop12h 15m
Icelandair
Thu 5/71:50 pm
BRU
-
SEA
1 stop15h 50m
Icelandair
Deal found 1/27$416
This KAYAK deal was found by Cheapflights users on 1/28. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure KAYAK is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Wed 2/42:35 pm
SEA
-
BRU
1 stop12h 20m
Icelandair
Thu 2/1212:50 pm
BRU
-
SEA
1 stop13h 10m
Icelandair
Deal found 1/28$426
This oojo deal was found by Cheapflights users on 1/27. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure oojo is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Sat 5/23:30 pm
PDX
-
BRU
1 stop12h 25m
Icelandair
Sun 5/101:50 pm
BRU
-
PDX
1 stop13h 10m
Icelandair
Deal found 1/27$444
This oojo deal was found by Cheapflights users on 1/27. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure oojo is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Sun 5/33:40 pm
SEA
-
BRU
1 stop12h 15m
Icelandair
Sat 5/161:50 pm
BRU
-
SEA
1 stop13h 05m
Icelandair
Deal found 1/27$447
This oojo deal was found by Cheapflights users on 1/28. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure oojo is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Tue 3/317:00 pm
SEA
-
BRU
1 stop32h 55m
Icelandair
Mon 4/201:50 pm
BRU
-
SEA
1 stop15h 50m
Icelandair
Deal found 1/28$452
This FlightHub deal was found by Cheapflights users on 1/26. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure FlightHub is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Mon 5/47:00 pm
SEA
-
BRU
1 stop32h 55m
Icelandair
Wed 5/271:50 pm
BRU
-
SEA
1 stop15h 50m
Icelandair
Deal found 1/26$453
This KAYAK deal was found by Cheapflights users on 1/26. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure KAYAK is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Sat 5/23:40 pm
SEA
-
BRU
1 stop12h 15m
Icelandair
Mon 5/251:50 pm
BRU
-
SEA
1 stop15h 50m
Icelandair
Deal found 1/26$474
This Mytrip deal was found by Cheapflights users on 1/28. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Mytrip is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Wed 2/255:45 am
SEA
-
BRU
2 stops17h 05m
Multiple Airlines
Wed 3/46:45 am
BRU
-
SEA
1 stop15h 35m
Multiple Airlines
Deal found 1/28$476
This United Airlines deal was found by Cheapflights users on 1/28. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure United Airlines is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Tue 3/38:30 am
PDX
-
BRU
2 stops19h 45m
United Airlines
Fri 3/1310:00 am
BRU
-
PDX
2 stops41h 14m
United Airlines
Deal found 1/28$486

Find flight deals from Washington to Belgium

Keep the following information in mind while searching for Washington to Belgium flight deals. Data was last updated January 29, 2026.

Round-trip from

$386
(Flightnetwork)

One-way from

$230
(oojo)

Popular in

December

Cheapest in

October

Average price

$516
From Washington to Belgium
Search Deals
One-way flight from Washington to Belgium
Search Deals
Highest demand for flights based on searches. 3% potential increase in price ($20 potential increase over avg. RT price).
Search Deals
Cheapest flight prices on average. 3% potential price decrease ($22 potential savings vs. average RT price).
Search Deals
Average for round-trip flights in January 2026
Search Deals

Cheapflights Fare Finder

 
Customize your flight search to find flights from 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, Cheapflights users made 2,558,603 searches. Data last updated January 29, 2026.
Use the filters below to find and compare flights from Washington to Belgium that are best for you.

Fly from

Washington

Fly to

Belgium

Route

Depart

Return

Price

PortlandBrussels

PDX - BRU

PDXBRU

Portland

Sat 3/7

2:45 pm-11:55 am

1 stop12h 10m

Brussels Bruxelles-National

Fri 3/20

12:50 pm-6:00 pm

1 stop13h 10m

$386

PortlandBrussels

PDX - BRU

PDXBRU

Portland

Sat 5/2

3:30 pm-12:55 pm

1 stop12h 25m

Brussels Bruxelles-National

Sun 5/10

1:50 pm-6:00 pm

1 stop13h 10m

$444

SeattleBrussels

SEA - BRU

SEABRU

Seattle/Tacoma Intl

Sun 5/3

3:40 pm-12:55 pm

1 stop12h 15m

Brussels Bruxelles-National

Wed 5/27

1:50 pm-8:40 pm

1 stop15h 50m

$474

SeattleBrussels

SEA - BRU

SEABRU

Seattle/Tacoma Intl

Thu 5/7

3:40 pm-12:55 pm

1 stop12h 15m

Brussels Bruxelles-National

Wed 5/27

1:50 pm-8:40 pm

1 stop15h 50m

$474

PortlandBrussels

PDX - BRU

PDXBRU

Portland

Tue 3/3

8:30 am-1:15 pm

2 stops19h 45m

Brussels Bruxelles-National

Fri 3/13

10:00 am-7:14 pm

2 stops41h 14m

$486

SeattleBrussels

SEA - BRU

SEABRU

Seattle/Tacoma Intl

Wed 4/22

12:54 pm-1:15 pm

2 stops15h 21m

Brussels Bruxelles-National

Thu 5/7

7:00 am-2:20 pm

2 stops16h 20m

$501

PortlandBrussels

PDX - BRU

PDXBRU

Portland

Sat 3/7

10:19 pm-7:15 am

1 stop23h 56m

Brussels Bruxelles-National

Fri 3/20

10:15 am-9:52 pm

1 stop19h 37m

$502

SeattleBrussels

SEA - BRU

SEABRU

Seattle/Tacoma Intl

Tue 3/31

3:40 pm-8:00 pm

2 stops19h 20m

Brussels Bruxelles-National

Wed 4/22

8:30 am-12:20 pm

1 stop12h 50m

$504

PortlandBrussels

PDX - BRU

PDXBRU

Portland

Wed 3/4

7:05 pm-7:50 am

2 stops27h 45m

Brussels Bruxelles-National

Sun 3/8

9:05 am-8:15 am

2 stops32h 10m

$507

PortlandBrussels

PDX - BRU

PDXBRU

Portland

Wed 4/22

8:05 am-7:15 am

1 stop14h 10m

Brussels Bruxelles-National

Wed 4/29

12:00 pm-8:42 pm

1 stop17h 42m

$508

Flights are sorted by cheapest round-trip flights first.

Deals found on 1/28

Showing 1-10 of 46 results
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Best time to book a flight from Washington to Belgium

Have a flexible travel schedule? Discover the best time to fly to Belgium from Washington with our price prediction graph.
Estimated round-trip price
Rates are based on past data. Find the cheapest month and day to book your flight based on your travel requirements, then search for cheap deals.

Cheapflights Insights

Everything you need to know about your flight from Washington to Belgium

What is the cheapest month to book a flight from State of Washington to Belgium?

Currently, January is the cheapest month in which you can book a flight from State of Washington to Belgium (average of $378). Flying from State of Washington to Belgium in July is currently the most expensive (average of $505). There are several factors that can impact the price of a flight, so comparing airlines, departure airports and flight times can provide users with more options.

Related info for your journey

Find useful and relevant information for your journey from Washington to Belgium. Access travel guides, tips, and recommendations to enhance your travel experience. Get information about local attractions, weather, transportation options, and more.

  • How long is the flight from State of Washington to Belgium?

    A quick flight from State of Washington to Belgium can take about 12h 10m. Icelandair provides one of the quickest options available for as low as $386. State of Washington and Belgium are separated by a distance of 5057 mi. This flight may include one or multiple stops.

  • What are the cheapest airlines to fly from State of Washington to Belgium one-way?

    The cheapest airlines for a one-way flight from State of Washington to Belgium are Icelandair ($175), United Airlines ($324), and KLM ($373).

  • Can I find deals for flights from Washington to Belgium that include hotel bookings?

    Yes. In addition to deals on Washington to Belgium flights, Cheapflights offers vacation packages that include both flights and hotel.

  • How can I find direct flights from Washington to Belgium?

    After entering your origin and destination, apply the non-stop filter on the search result page to find direct flights from Washington to Belgium.

  • Can I find deals for business class flights from Washington to Belgium?

    Yes. Cheapflights offers flight deals from Washington to Belgium by cabin class. In addition to browsing deals, you can also filter by cabin class on the search results page after making a search.

  • What is the cheapest month to book a flight from State of Washington to Belgium?

    Currently, January is the cheapest month in which you can book a flight from State of Washington to Belgium (average of $378). Flying from State of Washington to Belgium in July is currently the most expensive (average of $505). There are several factors that can impact the price of a flight, so comparing airlines, departure airports and flight times can provide users with more options.

See more FAQs

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Alternative routes for Washington to Belgium

See prices for flight routes from nearby airports that may be better suited for you.
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Top 9 airlines flying from Washington to Belgium

Discover the top 9 airlines that operate flights from Washington to Belgium. Compare their services, reliability, and customer satisfaction ratings to choose the airline that best suits your travel preferences and needs. Over the last 7 days, Cheapflights users made 2,558,603 searches. Data last updated January 29, 2026.
AirlineCheapestAverageFlexibilityOn-time
IcelandairCheapest$385Average$483FlexibilityNo cancel feeOn-time76%
British AirwaysCheapest$474Average$727FlexibilityNo cancel feeOn-time70%
DeltaCheapest$482Average$683FlexibilityNo cancel feeOn-timeN/A
United AirlinesCheapest$483Average$730FlexibilityNo cancel feeOn-time69%
Virgin AtlanticCheapest$488Average$491FlexibilityNo cancel feeOn-time72%
LufthansaCheapest$494Average$684FlexibilityNo cancel feeOn-time76%
KLMCheapest$508Average$696FlexibilityNo cancel feeOn-time75%
Air CanadaCheapest$518Average$808FlexibilityNo cancel feeOn-time67%
Aer LingusCheapest$536Average$592FlexibilityNo cancel feeOn-timeN/A

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