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$322+ 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 9/16. Fares are subject to change and may not be available on all flights or dates of travel.
SEA — BRU
Aug 5 — Aug 121
Tue 8/5
Tue 8/12
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 July 31, 2025.

Round-trip from

$464
(United Airlines)

One-way from

$322
(TAP AIR PORTUGAL)

Popular in

June

Cheapest in

September

Average price

$743
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. 15% potential increase in price ($116 potential increase over avg. RT price).
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Cheapest flight prices on average. 3% potential price decrease ($20 potential savings vs. average RT price).
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Average for round-trip flights in July 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 July 31, 2025.

This United Airlines deal was found by Cheapflights users on 7/31. 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 9/108:00 amSEA - BRU
1 stop14h 15mUnited Airlines
Thu 9/1810:00 amBRU - SEA
2 stops43h 42mUnited Airlines
Deal found 7/31$464
This Delta deal was found by Cheapflights users on 7/30. 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 Delta is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Mon 8/189:45 pmSEA - BRU
1 stop25h 55mDelta
Tue 8/2610:45 amBRU - SEA
2 stops22h 14mDelta
Deal found 7/30$467
This Mytrip deal was found by Cheapflights users on 7/31. 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 9/1012:00 pmSEA - BRU
2 stops16h 15mMultiple Airlines
Thu 9/1810:00 amBRU - SEA
2 stops21h 16mMultiple Airlines
Deal found 7/31$469
This Virgin Atlantic deal was found by Cheapflights users on 7/31. 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 Virgin Atlantic is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Thu 7/316:00 amSEA - BRU
1 stop17h 40mVirgin Atlantic
Wed 8/2010:45 amBRU - SEA
1 stop22h 14mVirgin Atlantic
Deal found 7/31$470
This Priceline deal was found by Cheapflights users on 7/31. 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 Priceline is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Mon 8/187:20 amSEA - BRU
1 stop15h 40mAir Canada
Wed 8/2710:00 amBRU - SEA
2 stops32h 21mAir Canada
Deal found 7/31$472
This Ovago deal was found by Cheapflights users on 7/30. 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 Ovago is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Wed 11/192:20 pmSEA - BRU
2 stops17h 00mBritish Airways
Wed 12/35:55 pmBRU - SEA
1 stop32h 00mBritish Airways
Deal found 7/30$473
This Iberia deal was found by Cheapflights users on 7/30. 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 Iberia is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Tue 8/123:09 pmSEA - BRU
2 stops18h 46mIberia
Thu 8/2112:10 pmBRU - SEA
2 stops20h 31mIberia
Deal found 7/30$488
This oojo deal was found by Cheapflights users on 7/30. 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 8/911:30 pmSEA - BRU
1 stop28h 20mIcelandair
Sat 8/231:50 pmBRU - SEA
1 stop30h 35mIcelandair
Deal found 7/30$498
This SWISS deal was found by Cheapflights users on 7/31. 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 SWISS is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Sat 8/164:20 pmSEA - BRU
1 stop31h 30mSWISS
Mon 8/256:00 pmBRU - SEA
2 stops37h 59mSWISS
Deal found 7/31$542
This oojo deal was found by Cheapflights users on 7/29. 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 10/83:20 pmPDX - BRU
1 stop12h 30mIcelandair
Fri 10/241:50 pmBRU - PDX
1 stop13h 05mIcelandair
Deal found 7/29$587
This United Airlines deal was found by Cheapflights users on 7/29. 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.
Mon 12/15:27 amPDX - BRU
2 stops17h 23mUnited Airlines
Sun 12/710:00 amBRU - PDX
2 stops41h 45mUnited Airlines
Deal found 7/29$634
This Mytrip deal was found by Cheapflights users on 7/30. 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 8/276:15 amPDX - BRU
2 stops16h 45mMultiple Airlines
Wed 9/310:00 amBRU - PDX
2 stops22h 01mMultiple Airlines
Deal found 7/30$651

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 July 31, 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

Wed 9/10

8:00 am-7:15 am

1 stop14h 15m

Brussels Bruxelles-National

Thu 9/18

10:00 am-8:42 pm

2 stops43h 42m

$464

SeattleBrussels

SEA - BRU

SEABRU

Seattle/Tacoma Intl

Mon 8/18

9:45 pm-8:40 am

1 stop25h 55m

Brussels Bruxelles-National

Tue 8/26

10:45 am-11:59 pm

2 stops22h 14m

$467

SeattleBrussels

SEA - BRU

SEABRU

Seattle/Tacoma Intl

Wed 9/10

12:00 pm-1:15 pm

2 stops16h 15m

Brussels Bruxelles-National

Thu 9/18

10:00 am-10:16 pm

2 stops21h 16m

$469

SeattleBrussels

SEA - BRU

SEABRU

Seattle/Tacoma Intl

Mon 8/18

7:20 am-8:00 am

1 stop15h 40m

Brussels Bruxelles-National

Wed 8/27

10:00 am-9:21 am

2 stops32h 21m

$472

SeattleBrussels

SEA - BRU

SEABRU

Seattle/Tacoma Intl

Tue 8/26

6:00 am-8:40 am

1 stop17h 40m

Brussels Bruxelles-National

Tue 9/2

10:45 am-10:14 pm

2 stops20h 29m

$480

SeattleBrussels

SEA - BRU

SEABRU

Seattle/Tacoma Intl

Tue 8/12

3:09 pm-6:55 pm

2 stops18h 46m

Brussels Bruxelles-National

Thu 8/21

12:10 pm-11:41 pm

2 stops20h 31m

$488

SeattleBrussels

SEA - BRU

SEABRU

Seattle/Tacoma Intl

Sat 8/9

11:30 pm-12:50 pm

1 stop28h 20m

Brussels Bruxelles-National

Sat 8/23

1:50 pm-11:25 am

1 stop30h 35m

$498

SeattleBrussels

SEA - BRU

SEABRU

Seattle/Tacoma Intl

Tue 8/19

3:09 pm-5:45 pm

2 stops17h 36m

Brussels Bruxelles-National

Wed 8/27

10:55 am-11:41 pm

2 stops21h 46m

$519

SeattleBrussels

SEA - BRU

SEABRU

Seattle/Tacoma Intl

Sat 8/16

4:20 pm-8:50 am

1 stop31h 30m

Brussels Bruxelles-National

Mon 8/25

6:00 pm-10:59 pm

2 stops37h 59m

$542

PortlandBrussels

PDX - BRU

PDXBRU

Portland

Wed 10/8

3:20 pm-12:50 pm

1 stop12h 30m

Brussels Bruxelles-National

Fri 10/24

1:50 pm-5:55 pm

1 stop13h 05m

$587

Flights are sorted by cheapest round-trip flights first.

Deals found on 7/29

Showing 1-10 of 35 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 $1,081). 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 July 31, 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.

Reviews of airlines servicing Belgium

Get insights into the airlines that provide service to Belgium. Read reviews, discover amenities, and learn about the overall travel experience offered by airlines. Use this information to make informed decisions when choosing an airline for your flight to Belgium. Reviews last updated July 31, 2025.
Get a feel of what it's like to fly with Delta, KLM, and SWISS from Washington to Belgium by reading reviews from past customers. You can also see how each airline compares in terms of entertainment options, comfort, food, crew/service, and boarding process.
Delta
8.0
Very good
7,981 reviews

Entertainment

7.9

Boarding

8.2

Food

7.3

Overall

8.0

Crew

8.5

Comfort

7.9

Reviews

1 / 20
10.0
Excellent

Kim,May 2025

PIH - SLC

This trip was fine even with delay I had plenty of time to get connection flight!
Delta
8.0
Very good
7,981 reviews
Delta
8.0
Very good
7,981 reviews

Entertainment

7.9

Boarding

8.2

Food

7.3

Overall

8.0

Crew

8.5

Comfort

7.9

Reviews

1 / 20
10.0
Excellent

Kim,May 2025

PIH - SLC

This trip was fine even with delay I had plenty of time to get connection flight!
KLM
7.8
Good
1,383 reviews
Delta
8.0
Very good
7,981 reviews

Entertainment

7.9

Boarding

8.2

Food

7.3

Overall

8.0

Crew

8.5

Comfort

7.9

Reviews

1 / 20
10.0
Excellent

Kim,May 2025

PIH - SLC

This trip was fine even with delay I had plenty of time to get connection flight!
SWISS
7.5
Good
1,686 reviews
Delta
8.0
Very good
7,981 reviews

Entertainment

7.9

Boarding

8.2

Food

7.3

Overall

8.0

Crew

8.5

Comfort

7.9

Reviews

1 / 20
10.0
Excellent

Kim,May 2025

PIH - SLC

This trip was fine even with delay I had plenty of time to get connection flight!
United Airlines
7.4
Good
8,900 reviews
Delta
8.0
Very good
7,981 reviews

Entertainment

7.9

Boarding

8.2

Food

7.3

Overall

8.0

Crew

8.5

Comfort

7.9

Reviews

1 / 20
10.0
Excellent

Kim,May 2025

PIH - SLC

This trip was fine even with delay I had plenty of time to get connection flight!
Virgin Atlantic
7.4
Good
655 reviews
Delta
8.0
Very good
7,981 reviews

Entertainment

7.9

Boarding

8.2

Food

7.3

Overall

8.0

Crew

8.5

Comfort

7.9

Reviews

1 / 20
10.0
Excellent

Kim,May 2025

PIH - SLC

This trip was fine even with delay I had plenty of time to get connection flight!

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.

  • 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 TAP AIR PORTUGAL ($322), Icelandair ($350), and Delta ($411).

  • 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 $1,081). 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 July 31, 2025.
AirlineCheapestAverageFlexibilityOn-time
IcelandairCheapest$389Average$496FlexibilityNo cancel feeOn-time76%
American AirlinesCheapest$501Average$620FlexibilityNo cancel feeOn-time71%
British AirwaysCheapest$502Average$691FlexibilityNo cancel feeOn-time70%
KLMCheapest$511Average$709FlexibilityNo cancel feeOn-time75%
DeltaCheapest$514Average$717FlexibilityNo cancel feeOn-timeN/A
United AirlinesCheapest$522Average$675FlexibilityNo cancel feeOn-time69%
Aer LingusCheapest$532Average$538FlexibilityNo cancel feeOn-timeN/A
Air CanadaCheapest$543Average$740FlexibilityNo cancel feeOn-time67%
Air FranceCheapest$547Average$665FlexibilityNo cancel feeOn-time77%
LufthansaCheapest$570Average$736FlexibilityNo cancel feeOn-time76%

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