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$327+ 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 5/8. Fares are subject to change and may not be available on all flights or dates of travel.
SEA — BRU
Jan 16 — Jan 231
Fri 1/16
Fri 1/23
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 December 17, 2025.

This KLM deal was found by Cheapflights users on 12/16. 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 KLM is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Fri 12/267:10 amSEA - BRU
1 stop16h 50mKLM
Tue 1/132:45 pmBRU - SEA
1 stop30h 05mKLM
Deal found 12/16$758
This United Airlines deal was found by Cheapflights users on 12/16. 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.
Fri 12/2611:59 pmSEA - BRU
2 stops28h 11mUnited Airlines
Tue 1/1310:00 amBRU - SEA
2 stops32h 55mUnited Airlines
Deal found 12/16$768
This FlightHub deal was found by Cheapflights users on 12/16. 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 12/313:10 pmSEA - BRU
1 stop19h 45mMultiple Airlines
Wed 1/710:00 amBRU - SEA
2 stops21h 16mMultiple Airlines
Deal found 12/16$800
This United Airlines deal was found by Cheapflights users on 12/17. 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 12/317:00 amSEA - BRU
2 stops25h 30mUnited Airlines
Wed 1/79:40 amBRU - SEA
2 stops45h 36mUnited Airlines
Deal found 12/17$835
This Cheapflightsfares deal was found by Cheapflights users on 12/17. 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.
Thu 12/1810:52 amSEA - BRU
2 stops16h 43mLufthansa
Thu 12/2511:55 amBRU - SEA
1 stop18h 02mLufthansa
Deal found 12/17$878
This Cheapflightsfares deal was found by Cheapflights users on 12/16. 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 12/313:10 pmSEA - BRU
1 stop19h 45mLufthansa
Wed 1/710:10 amBRU - SEA
1 stop17h 04mLufthansa
Deal found 12/16$890
This United Airlines deal was found by Cheapflights users on 12/17. 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.
Thu 12/1810:52 amSEA - BRU
2 stops16h 43mUnited Airlines
Wed 12/244:55 pmBRU - SEA
2 stops54h 36mUnited Airlines
Deal found 12/17$945
This Expedia deal was found by Cheapflights users on 12/16. 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 Expedia is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Sun 12/2110:11 pmPDX - BRU
2 stops50h 24mMultiple Airlines
Sun 1/1810:15 amBRU - PDX
2 stops22h 17mMultiple Airlines
Deal found 12/16$1,380
This Cheapflightsfares deal was found by Cheapflights users on 12/16. 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 12/171:14 pmPDX - BRU
2 stops24h 26mLufthansa
Tue 12/2310:10 amBRU - PDX
1 stop21h 30mLufthansa
Deal found 12/16$1,489
This KLM deal was found by Cheapflights users on 12/16. 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 KLM is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Wed 12/177:05 amPDX - BRU
1 stop16h 55mKLM
Tue 12/232:45 pmBRU - PDX
1 stop29h 40mKLM
Deal found 12/16$1,597
This United Airlines deal was found by Cheapflights users on 12/16. 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.
Sat 12/206:40 pmPDX - BRU
2 stops37h 50mUnited Airlines
Sun 1/1810:00 amBRU - PDX
2 stops41h 56mUnited Airlines
Deal found 12/16$1,659
This United Airlines deal was found by Cheapflights users on 12/14. 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.
Sun 12/1411:59 pmPDX - BRU
2 stops28h 16mUnited Airlines
Sun 12/2110:10 amBRU - PDX
2 stops21h 49mUnited Airlines
Deal found 12/14$1,783

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 December 17, 2025.

Round-trip from

$382
(Gotogate)

One-way from

$327
(Gurufare)

Popular in

June

Cheapest in

October

Average price

$790
From Washington to Belgium
Search Deals
One-way flight from Washington to Belgium
Search Deals
Highest demand for flights based on searches. 13% potential increase in price ($97 potential increase over avg. RT price).
Search Deals
Cheapest flight prices on average. 3% potential price decrease ($19 potential savings vs. average RT price).
Search Deals
Average for round-trip flights in December 2025
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 December 17, 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

PortlandBrussels

PDX - BRU

PDXBRU

Portland

Mon 1/12

7:00 am-8:55 am

1 stop16h 55m

Brussels Bruxelles-National

Sun 1/25

10:10 am-6:56 pm

1 stop17h 46m

$454

SeattleBrussels

SEA - BRU

SEABRU

Seattle/Tacoma Intl

Sat 1/31

10:58 am-8:55 am

1 stop12h 57m

Brussels Bruxelles-National

Sat 2/7

11:55 am-8:57 pm

1 stop18h 02m

$456

SeattleBrussels

SEA - BRU

SEABRU

Seattle/Tacoma Intl

Fri 1/30

10:05 am-8:55 am

2 stops37h 50m

Brussels Bruxelles-National

Fri 2/6

10:00 am-8:57 pm

2 stops43h 57m

$480

SeattleBrussels

SEA - BRU

SEABRU

Seattle/Tacoma Intl

Fri 2/6

8:40 am-1:15 pm

3 stops19h 35m

Brussels Bruxelles-National

Fri 2/20

10:00 am-8:56 pm

2 stops43h 56m

$485

SeattleBrussels

SEA - BRU

SEABRU

Seattle/Tacoma Intl

Wed 1/28

8:40 am-8:55 am

3 stops39h 15m

Brussels Bruxelles-National

Sun 2/1

10:00 am-10:43 pm

2 stops45h 43m

$485

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-11:49 am

2 stops33h 49m

$485

PortlandBrussels

PDX - BRU

PDXBRU

Portland

Mon 1/12

11:59 pm-1:15 pm

2 stops28h 16m

Brussels Bruxelles-National

Sun 1/25

10:00 am-6:56 pm

2 stops41h 56m

$485

PortlandBrussels

PDX - BRU

PDXBRU

Portland

Sun 2/15

7:00 am-8:55 am

1 stop16h 55m

Brussels Bruxelles-National

Sat 2/28

10:10 am-10:56 pm

1 stop21h 46m

$487

PortlandBrussels

PDX - BRU

PDXBRU

Portland

Wed 3/4

10:56 am-8:55 am

1 stop12h 59m

Brussels Bruxelles-National

Tue 3/10

10:00 am-11:00 pm

3 stops45h 00m

$488

PortlandBrussels

PDX - BRU

PDXBRU

Portland

Mon 1/12

9:50 am-7:50 am

2 stops37h 00m

Brussels Bruxelles-National

Mon 1/19

10:00 am-9:15 am

2 stops56h 15m

$491

Flights are sorted by cheapest round-trip flights first.

Deals found on 12/16

Showing 1-10 of 55 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 $380). Flying from State of Washington to Belgium in July is currently the most expensive (average of $507). 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 December 17, 2025.

A simple way to save on the total cost of your ticket is to fly from State of Washington to Belgium in the afternoon. If you’re flexible enough to do this you can expect to save up to 12% on your trip compared to booking a flight at noon.

What is the cheapest day to fly from State of Washington to Belgium?

Use this chart to determine the cheapest time to fly round-trip from Washington to Belgium. Price data was last updated on December 16, 2024.

Travelers seeking maximum savings on their State of Washington to Belgium flight should consider departing on Tuesday mornings when fares are most often at their lowest. Friday afternoons flights should be avoided if possible as fares are typically the most expensive at this time.

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 16h 55m. Lufthansa provides one of the quickest options available for as low as $454. 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 ($348), and KLM ($412).

  • 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 $380). Flying from State of Washington to Belgium in July is currently the most expensive (average of $507). 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 December 17, 2025.
AirlineCheapestAverageFlexibilityOn-time
IcelandairCheapest$387Average$492FlexibilityNo cancel feeOn-time76%
DeltaCheapest$482Average$714FlexibilityNo cancel feeOn-timeN/A
British AirwaysCheapest$486Average$753FlexibilityNo cancel feeOn-time70%
Virgin AtlanticCheapest$488Average$491FlexibilityNo cancel feeOn-time72%
LufthansaCheapest$501Average$709FlexibilityNo cancel feeOn-time76%
United AirlinesCheapest$502Average$736FlexibilityNo cancel feeOn-time69%
Air FranceCheapest$506Average$581FlexibilityNo cancel feeOn-time77%
KLMCheapest$511Average$681FlexibilityNo cancel feeOn-time75%
Air CanadaCheapest$518Average$808FlexibilityNo cancel feeOn-time67%
Aer LingusCheapest$532Average$556FlexibilityNo cancel feeOn-timeN/A

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