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$639+ Cheap flights from Belgium to Seattle (SEA)

This is the cheapest round-trip flight price found by a Cheapflights user in the last 72 hours by searching for a flight departing on 2/12. Fares are subject to change and may not be available on all flights or dates of travel.
BRU — SEA
Jan 25 — Feb 11
Sun 1/25
Sun 2/1
1 adult, Economy
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Cheap flight deals from Belgium to Seattle

Cheapest flights from Belgium to Seattle
Explore the most affordable flight options available from Belgium to Seattle. Find the lowest fares from popular airlines and budget airlines, with prices last updated on December 26, 2025.

This Kiwi.com deal was found by Cheapflights users on 12/24. 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.
Wed 12/247:30 pmBRU - SEA
2 stops29h 10mMultiple Airlines
Sun 12/288:05 pmSEA - BRU
1 stop13h 10mMultiple Airlines
Deal found 12/24$1,140
This Delta deal was found by Cheapflights users on 12/24. 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.
Wed 12/242:45 pmBRU - SEA
2 stops29h 00mDelta
Sun 12/2810:55 pmSEA - BRU
2 stops23h 40mDelta
Deal found 12/24$1,272
This British Airways deal was found by Cheapflights users on 12/23. 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 British Airways is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Wed 12/245:55 pmBRU - SEA
2 stops34h 19mBritish Airways
Wed 1/76:50 pmSEA - BRU
1 stop15h 45mBritish Airways
Deal found 12/23$8,384

Find flight deals from Belgium to Seattle

Keep the following information in mind while searching for Belgium to Seattle flight deals. Data was last updated December 26, 2025.

Round-trip from

$626
(Booking.com)

Popular in

November

Cheapest in

December

Average price

$620
From Belgium to Seattle/Tacoma Intl
Search Deals
Highest demand for flights based on searches. 3% potential increase in price ($30 potential increase over avg. RT price).
Search Deals
Cheapest flight prices on average. 2% potential price decrease ($18 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 Belgium to Seattle 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 26, 2025.
Use the filters below to find and compare flights from Belgium to Seattle that are best for you.

Fly from

Belgium

Fly to

Seattle

Route

Depart

Return

Price

BrusselsSeattle

BRU - SEA

BRUSEA

Brussels Bruxelles-National

Thu 2/12

5:30 pm-4:55 pm

1 stop32h 25m

Seattle/Tacoma Intl

Thu 2/26

7:15 am-10:50 am

2 stops18h 35m

$639

BrusselsSeattle

BRU - SEA

BRUSEA

Brussels Bruxelles-National

Wed 5/6

10:55 am-6:25 pm

1 stop16h 30m

Seattle/Tacoma Intl

Thu 5/28

8:20 pm-8:40 pm

1 stop15h 20m

$691

BrusselsSeattle

BRU - SEA

BRUSEA

Brussels Bruxelles-National

Sat 5/9

7:55 pm-11:35 am

1 stop24h 40m

Seattle/Tacoma Intl

Sat 5/30

1:35 pm-7:45 pm

1 stop21h 10m

$694

BrusselsSeattle

BRU - SEA

BRUSEA

Brussels Bruxelles-National

Thu 3/5

3:00 pm-4:55 pm

1 stop34h 55m

Seattle/Tacoma Intl

Sun 3/8

10:31 am-4:40 pm

2 stops22h 09m

$694

BrusselsSeattle

BRU - SEA

BRUSEA

Brussels Bruxelles-National

Thu 3/5

8:35 pm-4:55 pm

1 stop29h 20m

Seattle/Tacoma Intl

Sun 3/8

7:50 pm-11:10 am

1 stop31h 20m

$697

BrusselsSeattle

CRL - SEA

CRLSEA

Charleroi Brussels

Thu 2/12

7:35 am-5:00 pm

2 stops18h 25m

Seattle/Tacoma Intl

Thu 2/26

8:10 am-1:45 pm

2 stops20h 35m

$1,124

BrusselsSeattle

CRL - SEA

CRLSEA

Charleroi Brussels

Fri 6/12

6:35 pm-3:40 pm

2 stops30h 05m

Seattle/Tacoma Intl

Tue 6/16

3:40 pm-10:55 pm

2 stops22h 15m

$1,198

BrusselsSeattle

BRU - SEA

BRUSEA

Brussels Bruxelles-National

Tue 1/6

7:00 pm-7:17 pm

3 stops57h 17m

$798

BrusselsSeattle

CRL - SEA

CRLSEA

Charleroi Brussels

Tue 1/6

3:05 pm-10:34 am

3 stops52h 29m

$857

BrusselsSeattle

BRU - SEA

BRUSEA

Brussels Bruxelles-National

Tue 1/6

10:10 am-6:14 pm

1 stop17h 04m

$1,702

Flights are sorted by cheapest round-trip flights first.

Deals found on 12/24

Showing 1-10 of 13 results
1
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Best time to book a flight from Belgium to Seattle

Have a flexible travel schedule? Discover the best time to fly to Seattle from Belgium 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 Belgium to Seattle

What is the cheapest month to book a flight from Belgium to Seattle?

Currently, September is the cheapest month in which you can book a flight from Belgium to Seattle (average of $520). Flying from Belgium to Seattle in November is currently the most expensive (average of $743). 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.

Reviews of airlines servicing Seattle

Get insights into the airlines that provide service to Seattle. 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 Seattle. Reviews last updated December 26, 2025.
Peruse reviews from past customers who have flown with Delta, KLM, and Icelandair from Belgium to Seattle to help guide your decision. You can also see how each airline stacks up in terms of entertainment options, comfort, food, crew/service, and boarding process.
Delta
7.9
Good
8,018 reviews

Entertainment

7.9

Comfort

7.9

Food

7.3

Crew

8.5

Boarding

8.1

Overall

7.9

Reviews

1 / 20
6.0
Good

Jim,Nov 2025

AVL - ATL

The exit row seats without a seat in front are great for leg room but don’t have a fold out entertainment console so you’re forced to use the screen several feet in front of you (there is, at least, a remote). Best to bring a tablet loaded with entertainment or a book.
Delta
7.9
Good
8,018 reviews
Delta
7.9
Good
8,018 reviews

Entertainment

7.9

Comfort

7.9

Food

7.3

Crew

8.5

Boarding

8.1

Overall

7.9

Reviews

1 / 20
6.0
Good

Jim,Nov 2025

AVL - ATL

The exit row seats without a seat in front are great for leg room but don’t have a fold out entertainment console so you’re forced to use the screen several feet in front of you (there is, at least, a remote). Best to bring a tablet loaded with entertainment or a book.
KLM
7.7
Good
1,434 reviews
Delta
7.9
Good
8,018 reviews

Entertainment

7.9

Comfort

7.9

Food

7.3

Crew

8.5

Boarding

8.1

Overall

7.9

Reviews

1 / 20
6.0
Good

Jim,Nov 2025

AVL - ATL

The exit row seats without a seat in front are great for leg room but don’t have a fold out entertainment console so you’re forced to use the screen several feet in front of you (there is, at least, a remote). Best to bring a tablet loaded with entertainment or a book.
Icelandair
7.0
Good
592 reviews
Delta
7.9
Good
8,018 reviews

Entertainment

7.9

Comfort

7.9

Food

7.3

Crew

8.5

Boarding

8.1

Overall

7.9

Reviews

1 / 20
6.0
Good

Jim,Nov 2025

AVL - ATL

The exit row seats without a seat in front are great for leg room but don’t have a fold out entertainment console so you’re forced to use the screen several feet in front of you (there is, at least, a remote). Best to bring a tablet loaded with entertainment or a book.
Lufthansa
6.8
Okay
7,657 reviews
Delta
7.9
Good
8,018 reviews

Entertainment

7.9

Comfort

7.9

Food

7.3

Crew

8.5

Boarding

8.1

Overall

7.9

Reviews

1 / 20
6.0
Good

Jim,Nov 2025

AVL - ATL

The exit row seats without a seat in front are great for leg room but don’t have a fold out entertainment console so you’re forced to use the screen several feet in front of you (there is, at least, a remote). Best to bring a tablet loaded with entertainment or a book.
British Airways
6.7
Okay
7,619 reviews
Delta
7.9
Good
8,018 reviews

Entertainment

7.9

Comfort

7.9

Food

7.3

Crew

8.5

Boarding

8.1

Overall

7.9

Reviews

1 / 20
6.0
Good

Jim,Nov 2025

AVL - ATL

The exit row seats without a seat in front are great for leg room but don’t have a fold out entertainment console so you’re forced to use the screen several feet in front of you (there is, at least, a remote). Best to bring a tablet loaded with entertainment or a book.

Related info for your journey

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

  • What airport do you fly into for flights to Seattle from Belgium?

    If you book a flight to Seattle from Belgium, you will be flying to Seattle/Tacoma Intl, which is the city’s only airport. Seattle/Tacoma Intl (SEA) is located 11.4 mi from the center of Seattle.

  • How long is the flight from Belgium to Seattle?

    Departing from Belgium to Seattle will take you 16h 30m. Airlines will cover a distance of 4941 mi. Both multi-stop and nonstop flights can be found to your destination and back.

  • What are the cheapest airlines to fly from Belgium to Seattle one-way?

    $516 is the cheapest one-way deal found within the past few days, from Icelandair. You may also be able to find cheap deals on Aer Lingus and Lufthansa, with prices starting from $545 and $582, respectively.

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

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

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

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

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

    Yes. Cheapflights offers flight deals from Belgium to Seattle 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 Belgium to Seattle?

    Currently, September is the cheapest month in which you can book a flight from Belgium to Seattle (average of $520). Flying from Belgium to Seattle in November is currently the most expensive (average of $743). 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

Traveling to a place near Seattle?

Book flights to Seattle if you plan to visit one of these locations
Tacoma
SeaTac
Lakewood
Ocean Shores
Olympia
Edmonds
Lynnwood
Renton
Puyallup
Kirkland
Kent
Tukwila
Cle Elum
Marysville
Fife
Aberdeen
Shoreline
Centralia
Federal Way
Chehalis

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Top 8 airlines flying from Belgium to Seattle

Discover the top 8 airlines that operate flights from Belgium to Seattle. 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 26, 2025.
AirlineCheapestAverageFlexibilityOn-time
Aer LingusCheapest$524Average$700FlexibilityNo cancel feeOn-timeN/A
IcelandairCheapest$586Average$626FlexibilityNo cancel feeOn-time76%
British AirwaysCheapest$592Average$679FlexibilityNo cancel feeOn-time70%
United AirlinesCheapest$597Average$744FlexibilityNo cancel feeOn-time69%
KLMCheapest$605Average$684FlexibilityNo cancel feeOn-time75%
DeltaCheapest$616Average$874FlexibilityNo cancel feeOn-timeN/A
FinnairCheapest$651Average$723FlexibilityNo cancel feeOn-time76%
LufthansaCheapest$687Average$879FlexibilityNo cancel feeOn-time76%

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