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$314+ 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 10/12. Fares are subject to change and may not be available on all flights or dates of travel.
SEA — BRU
Oct 15 — Oct 221
Wed 10/15
Wed 10/22
1 adult, Economy
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Cheap flight deals from Washington to Belgium

Keep the following information in mind while searching for Washington to Belgium flight deals. Data was last updated September 15, 2025.

Round-trip from

$386
(Gotogate)

One-way from

$314
(Kiwi.com)

Popular in

June

Cheapest in

September

Average price

$527
From Washington to Belgium
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One-way flight from Washington to Belgium
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Highest demand for flights based on searches. 14% potential increase in price ($106 potential increase over avg. RT price).
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Cheapest flight prices on average. 2% potential price decrease ($18 potential savings vs. average RT price).
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Average for round-trip flights in September 2025
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Find 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 September 15, 2025.

This Gotogate deal was found by Cheapflights users on 9/13. 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 Gotogate is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Thu 10/233:45 pmSEA - BRU
1 stop12h 05mIcelandair
Thu 11/612:50 pmBRU - SEA
1 stop13h 10mIcelandair
Deal found 9/13$386
This CrystalTravel deal was found by Cheapflights users on 9/14. 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 CrystalTravel is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Thu 10/93:45 pmSEA - BRU
1 stop12h 05mIcelandair
Thu 10/161:50 pmBRU - SEA
1 stop15h 50mIcelandair
Deal found 9/14$392
This FlightHub deal was found by Cheapflights users on 9/13. 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.
Wed 10/223:45 pmSEA - BRU
1 stop12h 30mIcelandair
Thu 1/2212:50 pmBRU - SEA
1 stop13h 10mIcelandair
Deal found 9/13$394
This oojo deal was found by Cheapflights users on 9/13. 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.
Wed 11/52:35 pmSEA - BRU
1 stop12h 20mIcelandair
Sun 11/1612:50 pmBRU - SEA
1 stop13h 10mIcelandair
Deal found 9/13$398
This oojo deal was found by Cheapflights users on 9/13. 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 10/53:45 pmSEA - BRU
1 stop12h 05mIcelandair
Fri 10/101:50 pmBRU - SEA
1 stop15h 50mIcelandair
Deal found 9/13$407
This Mytrip deal was found by Cheapflights users on 9/13. 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.
Tue 10/285:50 amSEA - BRU
2 stops18h 00mAir Canada
Tue 11/410:00 amBRU - SEA
2 stops18h 16mAir Canada
Deal found 9/13$415
This Icelandair deal was found by Cheapflights users on 9/13. 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 Icelandair is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Sun 10/193:45 pmSEA - BRU
1 stop12h 05mIcelandair
Fri 1/2312:50 pmBRU - SEA
1 stop13h 10mIcelandair
Deal found 9/13$416
This Mytrip deal was found by Cheapflights users on 9/12. 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.
Tue 10/285:50 amSEA - BRU
2 stops18h 00mMultiple Airlines
Tue 11/410:00 amBRU - SEA
2 stops18h 16mMultiple Airlines
Deal found 9/12$423
This United Airlines deal was found by Cheapflights users on 9/15. 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.
Wed 11/57:00 amSEA - BRU
1 stop16h 55mUnited Airlines
Tue 11/1810:00 amBRU - SEA
2 stops43h 54mUnited Airlines
Deal found 9/15$435
This FlightHub deal was found by Cheapflights users on 9/14. 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.
Tue 12/23:15 pmPDX - BRU
2 stops31h 35mAir Canada
Tue 12/910:00 amBRU - PDX
2 stops41h 45mAir Canada
Deal found 9/14$529
This United Airlines deal was found by Cheapflights users on 9/14. 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 12/27:00 amPDX - BRU
1 stop16h 55mUnited Airlines
Tue 12/910:00 amBRU - PDX
2 stops34h 48mUnited Airlines
Deal found 9/14$534
This United Airlines deal was found by Cheapflights users on 9/14. 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.
Wed 10/298:20 amPDX - BRU
1 stop14h 55mUnited Airlines
Wed 11/510:00 amBRU - PDX
2 stops23h 26mUnited Airlines
Deal found 9/14$556

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 September 15, 2025.
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

SeattleBrussels

SEA - BRU

SEABRU

Seattle/Tacoma Intl

Sun 10/19

3:45 pm-12:50 pm

1 stop12h 05m

Brussels Bruxelles-National

Thu 1/22

12:50 pm-5:00 pm

1 stop13h 10m

$416

SeattleBrussels

SEA - BRU

SEABRU

Seattle/Tacoma Intl

Wed 3/4

2:35 pm-11:55 am

1 stop12h 20m

Brussels Bruxelles-National

Sun 3/15

12:50 pm-6:00 pm

1 stop13h 10m

$416

SeattleBrussels

SEA - BRU

SEABRU

Seattle/Tacoma Intl

Thu 10/23

3:45 pm-12:50 pm

1 stop12h 05m

Brussels Bruxelles-National

Fri 1/23

12:50 pm-5:00 pm

1 stop13h 10m

$416

SeattleBrussels

SEA - BRU

SEABRU

Seattle/Tacoma Intl

Wed 11/5

10:53 am-8:55 am

1 stop13h 02m

Brussels Bruxelles-National

Tue 11/18

10:00 am-8:54 pm

2 stops43h 54m

$435

SeattleBrussels

SEA - BRU

SEABRU

Seattle/Tacoma Intl

Tue 2/10

10:58 am-8:55 am

1 stop12h 57m

Brussels Bruxelles-National

Tue 3/10

10:00 am-6:59 pm

2 stops40h 59m

$435

SeattleBrussels

SEA - BRU

SEABRU

Seattle/Tacoma Intl

Wed 11/12

10:53 am-8:55 am

1 stop13h 02m

Brussels Bruxelles-National

Tue 11/18

10:00 am-8:54 pm

2 stops43h 54m

$435

PortlandBrussels

PDX - BRU

PDXBRU

Portland

Wed 10/29

8:20 am-7:15 am

1 stop14h 55m

Brussels Bruxelles-National

Wed 11/5

10:10 am-6:40 pm

1 stop17h 30m

$556

PortlandBrussels

PDX - BRU

PDXBRU

Portland

Tue 12/2

7:00 am-8:55 am

1 stop16h 55m

Brussels Bruxelles-National

Tue 12/9

10:10 am-6:45 pm

1 stop17h 35m

$556

PortlandBrussels

PDX - BRU

PDXBRU

Portland

Mon 12/1

12:59 am-6:25 pm

2 stops32h 26m

Brussels Bruxelles-National

Tue 12/9

7:10 pm-7:10 pm

2 stops33h 00m

$582

PortlandBrussels

PDX - BRU

PDXBRU

Portland

Fri 3/6

8:00 am-7:15 am

1 stop14h 15m

Brussels Bruxelles-National

Tue 3/10

10:00 am-6:05 pm

2 stops40h 05m

$583

Flights are sorted by cheapest round-trip flights first.

Deals found on 9/13

Showing 1-10 of 37 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, November is the cheapest month in which you can book a flight from State of Washington to Belgium (average of $614). Flying from State of Washington to Belgium in June is currently the most expensive (average of $1,077). 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.

What is the cheapest time of day to fly from WA to BE?

Find hourly flight availability from Washington to Belgium. Discover flight options and departure times throughout the day, allowing you to choose a departure time that suits your schedule. Data last updated September 15, 2025.

When flying from State of Washington to Belgium, the time of day you decide to fly out makes little to no difference towards the overall price you’ll pay on tickets.

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 05m. Icelandair provides one of the quickest options available for as low as $416. State of Washington and Belgium are separated by a distance of 4941 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 ($333), British Airways ($435), and Delta ($488).

  • 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, November is the cheapest month in which you can book a flight from State of Washington to Belgium (average of $614). Flying from State of Washington to Belgium in June is currently the most expensive (average of $1,077). 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 10 airlines flying from Washington to Belgium

Discover the top 10 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 September 15, 2025.
AirlineCheapestAverageFlexibilityOn-time
IcelandairCheapest$391Average$497FlexibilityNo cancel feeOn-time76%
United AirlinesCheapest$483Average$725FlexibilityNo cancel feeOn-time69%
Virgin AtlanticCheapest$488Average$491FlexibilityNo cancel feeOn-time72%
British AirwaysCheapest$502Average$714FlexibilityNo cancel feeOn-time70%
Air FranceCheapest$506Average$607FlexibilityNo cancel feeOn-time77%
KLMCheapest$511Average$702FlexibilityNo cancel feeOn-time75%
DeltaCheapest$514Average$722FlexibilityNo cancel feeOn-timeN/A
Aer LingusCheapest$532Average$556FlexibilityNo cancel feeOn-timeN/A
Air CanadaCheapest$543Average$740FlexibilityNo cancel feeOn-time67%
LufthansaCheapest$561Average$733FlexibilityNo cancel feeOn-time76%

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