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$184+ 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 8/29. Fares are subject to change and may not be available on all flights or dates of travel.
SEA — BRU
ก.ค. 9 — ก.ค. 161
พฤ. 7/9
พฤ. 7/16
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 มิถุนายน 9, 2026.

This oojo deal was found by Cheapflights users on 6/8. 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.
อา. 10/43:40 pm
SEA
-
BRU
1 stop12h 15m
Icelandair
จ. 10/191:50 pm
BRU
-
SEA
1 stop13h 05m
Icelandair
Deal found 6/8$521
This oojo deal was found by Cheapflights users on 6/7. 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.
อา. 10/183:40 pm
SEA
-
BRU
1 stop12h 15m
Icelandair
พฤ. 10/2912:50 pm
BRU
-
SEA
1 stop13h 10m
Icelandair
Deal found 6/7$522
This oojo deal was found by Cheapflights users on 6/7. 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.
จ. 10/57:00 pm
SEA
-
BRU
1 stop32h 55m
Icelandair
พฤ. 10/151:50 pm
BRU
-
SEA
1 stop15h 50m
Icelandair
Deal found 6/7$523
This FlightHub deal was found by Cheapflights users on 6/5. 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.
ศ. 9/253:40 pm
SEA
-
BRU
1 stop12h 15m
Icelandair
ส. 10/31:50 pm
BRU
-
SEA
1 stop15h 50m
Icelandair
Deal found 6/5$534
This oojo deal was found by Cheapflights users on 6/8. 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.
อ. 9/17:00 pm
SEA
-
BRU
1 stop32h 55m
Icelandair
พ. 9/91:50 pm
BRU
-
SEA
1 stop13h 05m
Icelandair
Deal found 6/8$536
This Kiwi.com deal was found by Cheapflights users on 6/5. 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 Kiwi.com is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
พ. 9/233:40 pm
SEA
-
BRU
1 stop12h 15m
Icelandair
พ. 10/71:50 pm
BRU
-
SEA
1 stop13h 05m
Icelandair
Deal found 6/5$555
This Kiwi.com deal was found by Cheapflights users on 6/5. 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 Kiwi.com is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
พฤ. 9/247:00 pm
SEA
-
BRU
1 stop32h 55m
Icelandair
พฤ. 10/11:50 pm
BRU
-
SEA
1 stop13h 05m
Icelandair
Deal found 6/5$556
This Icelandair deal was found by Cheapflights users on 6/5. 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.
ส. 9/263:40 pm
SEA
-
BRU
1 stop12h 15m
Icelandair
พ. 10/71:50 pm
BRU
-
SEA
1 stop13h 05m
Icelandair
Deal found 6/5$557
This oojo deal was found by Cheapflights users on 6/4. 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.
พ. 11/42:35 pm
SEA
-
BRU
1 stop12h 20m
Icelandair
อ. 11/1012:50 pm
BRU
-
SEA
1 stop13h 10m
Icelandair
Deal found 6/4$560
This BusinessClass deal was found by Cheapflights users on 6/5. 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 BusinessClass is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
พฤ. 9/247:00 pm
SEA
-
BRU
1 stop32h 55m
Icelandair
ส. 10/31:50 pm
BRU
-
SEA
1 stop15h 50m
Icelandair
Deal found 6/5$561
This FlightHub deal was found by Cheapflights users on 6/8. 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.
จ. 8/311:25 pm
SEA
-
BRU
1 stop28h 30m
Icelandair
ส. 8/221:50 pm
BRU
-
SEA
1 stop15h 50m
Icelandair
Deal found 6/8$563
This oojo deal was found by Cheapflights users on 6/6. 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.
จ. 11/162:45 pm
PDX
-
BRU
1 stop12h 10m
Icelandair
อา. 11/2912:50 pm
BRU
-
PDX
1 stop13h 10m
Icelandair
Deal found 6/6$668

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 มิถุนายน 9, 2026.

Round-trip from

$521
(oojo)

One-way from

$184
(Kiwi.com)

Popular in

June

Cheapest in

January

Average price

$1,138
From Washington to Belgium
Search Deals
One-way flight from Washington to Belgium
Search Deals
Highest demand for flights based on searches. 20% potential increase in price ($165 potential increase over avg. RT price).
Search Deals
Cheapest flight prices on average. 7% potential price decrease ($45 potential savings vs. average RT price).
Search Deals
Average for round-trip flights in June 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 มิถุนายน 9, 2026.
Use the filters below to find and compare flights from Washington to Belgium that are best for you.

Fly from

Fly to

Route

Depart

Return

Price

Cheapest round-trip

SeattleBrussels

SEA - BRU

SEABRU

Seattle/Tacoma Intl

พ. 11/4

12:46 pm-1:15 pm

2 stops15h 29m

Brussels Bruxelles-National

อ. 11/10

10:00 am-8:10 pm

2 stops43h 10m

$704

SeattleBrussels

SEA - BRU

SEABRU

Seattle/Tacoma Intl

ส. 8/8

7:00 am-1:15 pm

2 stops21h 15m

Brussels Bruxelles-National

พ. 9/23

9:10 am-11:27 am

2 stops35h 17m

$740

PortlandBrussels

PDX - BRU

PDXBRU

Portland

อ. 11/17

11:07 am-8:55 am

1 stop12h 48m

Brussels Bruxelles-National

อ. 12/1

10:00 am-8:25 pm

2 stops43h 25m

$770

PortlandBrussels

PDX - BRU

PDXBRU

Portland

พ. 9/30

4:07 pm-8:00 pm

2 stops18h 53m

Brussels Bruxelles-National

พ. 10/21

9:10 am-11:33 am

2 stops35h 23m

$783

SeattleBrussels

SEA - BRU

SEABRU

Seattle/Tacoma Intl

พฤ. 7/30

7:00 am-9:00 am

1 stop17h 00m

Brussels Bruxelles-National

พ. 8/12

9:30 am-10:42 pm

2 stops22h 12m

$859

SeattleBrussels

SEA - BRU

SEABRU

Seattle/Tacoma Intl

จ. 10/19

7:20 am-2:35 pm

2 stops22h 15m

Brussels Bruxelles-National

ศ. 10/23

5:45 am-8:48 pm

2 stops24h 03m

$873

PortlandBrussels

PDX - BRU

PDXBRU

Portland

จ. 8/3

10:55 pm-7:40 am

1 stop23h 45m

Brussels Bruxelles-National

พ. 8/19

3:10 pm-11:10 am

1 stop29h 00m

$873

PortlandBrussels

PDX - BRU

PDXBRU

Portland

ศ. 11/27

7:40 pm-11:55 am

2 stops31h 15m

Brussels Bruxelles-National

อา. 12/6

12:50 pm-5:00 pm

1 stop13h 10m

$874

PortlandBrussels

PDX - BRU

PDXBRU

Portland

อ. 8/4

12:50 pm-1:15 pm

2 stops15h 25m

Brussels Bruxelles-National

พ. 8/12

9:30 am-9:31 am

2 stops33h 01m

$904

SeattleBrussels

SEA - BRU

SEABRU

Seattle/Tacoma Intl

อ. 7/21

3:00 pm-8:00 pm

2 stops20h 00m

Brussels Bruxelles-National

จ. 8/17

10:30 am-2:22 pm

2 stops36h 52m

$905

Flights are sorted by cheapest round-trip flights first.

Deals found on 6/7

Showing 1-10 of 60 resultsSorted by cheapest first
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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 $375). Flying from State of Washington to Belgium in June is currently the most expensive (average of $693). 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.

How far ahead should I book a flight from State of Washington to Belgium?

Booking 75 days in advance of your planned departure date is, on average, the best time to get cheap flights from State of Washington to Belgium. The general trend is that the closer you book to the departure date, the more expensive your flight will be.

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 $668. State of Washington and Belgium are separated by a distance of 5057 mi. This flight may include one or multiple stops.

  • 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 $375). Flying from State of Washington to Belgium in June is currently the most expensive (average of $693). 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

Browse thousands of different options on Cheapflights for your next trip

Toggle through the tabs below to find thousands of options on Cheapflights for your next trip.

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 6 airlines flying from Washington to Belgium

Discover the top 6 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 มิถุนายน 9, 2026.
AirlineCheapestAverageFlexibilityOn-time
IcelandairCheapest$383Average$494FlexibilityNo cancel feeOn-time76%
British AirwaysCheapest$421Average$621FlexibilityNo cancel feeOn-time70%
United AirlinesCheapest$470Average$723FlexibilityNo cancel feeOn-time69%
KLMCheapest$481Average$719FlexibilityNo cancel feeOn-time75%
DeltaCheapest$482Average$642FlexibilityNo cancel feeOn-timeN/A
LufthansaCheapest$494Average$663FlexibilityNo cancel feeOn-time76%

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