Brussels

$302+ Cheap flights from Seattle (SEA) to Brussels

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 10/13. Fares are subject to change and may not be available on all flights or dates of travel.
SEA — BRU
May 27 — Jun 31
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Cheap flight deals from Seattle to Brussels

Cheapest flights from Seattle to Brussels
Explore the most affordable flight options available from Seattle to Brussels. Find the lowest fares from popular airlines and budget airlines, with prices last updated on April 27, 2026.

This CrystalTravel deal was found by Cheapflights users on 4/26. 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.
Mon 11/162:35 pm
SEA
-
BRU
1 stop12h 20m
Icelandair
Tue 12/112:50 pm
BRU
-
SEA
1 stop13h 10m
Icelandair
Deal found 4/26$602
This KAYAK deal was found by Cheapflights users on 4/26. 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 KAYAK is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Sat 11/142:35 pm
SEA
-
BRU
1 stop12h 20m
Icelandair
Thu 12/312:50 pm
BRU
-
SEA
1 stop13h 10m
Icelandair
Deal found 4/26$614
This KAYAK deal was found by Cheapflights users on 4/26. 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 KAYAK is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Sat 11/142:35 pm
SEA
-
BRU
1 stop12h 20m
Icelandair
Tue 12/112:50 pm
BRU
-
SEA
1 stop13h 10m
Icelandair
Deal found 4/26$644
This oojo deal was found by Cheapflights users on 4/26. 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 10/183:40 pm
SEA
-
BRU
1 stop12h 15m
Icelandair
Thu 10/2912:50 pm
BRU
-
SEA
1 stop13h 10m
Icelandair
Deal found 4/26$648
This Gotogate deal was found by Cheapflights users on 4/23. 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 Gotogate is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Wed 9/211:25 pm
SEA
-
BRU
1 stop28h 30m
Icelandair
Fri 9/111:50 pm
BRU
-
SEA
1 stop15h 50m
Icelandair
Deal found 4/23$656
This lastminute.com deal was found by Cheapflights users on 4/25. 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 lastminute.com is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Sat 5/97:00 pm
SEA
-
BRU
1 stop32h 55m
Icelandair
Sun 5/241:50 pm
BRU
-
SEA
1 stop30h 55m
Icelandair
Deal found 4/25$657
This Gotogate deal was found by Cheapflights users on 4/25. 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.
Tue 8/411:25 pm
SEA
-
BRU
1 stop28h 30m
Icelandair
Tue 9/81:50 pm
BRU
-
SEA
1 stop15h 50m
Icelandair
Deal found 4/25$658
This oojo deal was found by Cheapflights users on 4/25. 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.
Tue 9/111:25 pm
SEA
-
BRU
1 stop28h 30m
Icelandair
Wed 9/91:50 pm
BRU
-
SEA
1 stop15h 50m
Icelandair
Deal found 4/25$664
This Icelandair deal was found by Cheapflights users on 4/22. 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 10/113:40 pm
SEA
-
BRU
1 stop12h 15m
Icelandair
Thu 10/151:50 pm
BRU
-
SEA
1 stop13h 05m
Icelandair
Deal found 4/22$675
This Mytrip deal was found by Cheapflights users on 4/23. 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 Mytrip is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Tue 4/281:30 pm
SEA
-
CRL
3 stops24h 25m
Multiple Airlines
Wed 5/69:20 am
CRL
-
SEA
3 stops33h 20m
Multiple Airlines
Deal found 4/23$828
This Kiwi.com deal was found by Cheapflights users on 4/24. 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.
Thu 4/307:20 am
SEA
-
CRL
2 stops29h 10m
Multiple Airlines
Wed 5/64:20 pm
CRL
-
SEA
1 stop34h 25m
Multiple Airlines
Deal found 4/24$854
This Kiwi.com deal was found by Cheapflights users on 4/24. 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.
Mon 4/277:20 am
SEA
-
CRL
2 stops28h 15m
Multiple Airlines
Wed 5/64:20 pm
CRL
-
SEA
1 stop34h 25m
Multiple Airlines
Deal found 4/24$861

Find flight deals from Seattle to Brussels

Discover tips and strategies to find the most affordable flight options for your journey from Seattle (SEA) to Brussels (BR1). Learn about various techniques such as flexible date searches, comparing prices across and setting up price alerts. Use these methods to find the cheapest flights available for your travel needs. Data last updated April 27, 2026.

Round-trip from

$648
(oojo)

One-way from

$302
(Kiwi.com)

Popular in

December

Cheapest in

January

Average price

$570
From Seattle/Tacoma Intl to Brussels
One-way flight from Seattle/Tacoma Intl to Brussels
Highest demand for flights based on searches. 5% potential increase in price ($33 potential increase over avg. RT price).
Cheapest flight prices on average. 3% potential price decrease ($23 potential savings vs. average RT price).
Average for round-trip flights in April 2026

Cheapflights Fare Finder

 
Customize your flight search to find flights from Seattle to Brussels 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 April 27, 2026.
Use the filters below to find and compare flights from Seattle to Brussels that are best for you.

Fly from

Fly to

Route

Depart

Return

Price

Cheapest round-trip

SeattleBrussels

SEA - BRU

SEABRU

Seattle/Tacoma Intl

Wed 9/2

11:25 pm-12:55 pm

1 stop28h 30m

Brussels Bruxelles-National

Wed 9/9

1:50 pm-8:40 pm

1 stop15h 50m

$665
Quickest round-trip

SeattleBrussels

SEA - BRU

SEABRU

Seattle/Tacoma Intl

Sun 10/11

3:40 pm-12:55 pm

1 stop12h 15m

Brussels Bruxelles-National

Thu 10/15

1:50 pm-5:55 pm

1 stop13h 05m

$675

SeattleBrussels

SEA - BRU

SEABRU

Seattle/Tacoma Intl

Wed 9/2

6:50 pm-7:55 pm

1 stop16h 05m

Brussels Bruxelles-National

Wed 9/9

9:25 am-10:42 pm

2 stops22h 17m

$774

SeattleBrussels

SEA - BRU

SEABRU

Seattle/Tacoma Intl

Sun 10/18

5:40 am-8:00 pm

2 stops29h 20m

Brussels Bruxelles-National

Thu 10/29

7:00 am-1:10 pm

1 stop14h 10m

$778

SeattleBrussels

SEA - BRU

SEABRU

Seattle/Tacoma Intl

Wed 9/2

5:45 am-7:10 am

2 stops16h 25m

Brussels Bruxelles-National

Wed 9/9

9:25 am-10:42 pm

2 stops22h 17m

$780

SeattleBrussels

SEA - BRU

SEABRU

Seattle/Tacoma Intl

Tue 8/4

11:02 am-1:15 pm

2 stops17h 13m

Brussels Bruxelles-National

Tue 9/8

8:30 am-11:55 am

1 stop12h 25m

$782

SeattleBrussels

SEA - BRU

SEABRU

Seattle/Tacoma Intl

Sun 10/11

12:44 pm-1:15 pm

2 stops15h 31m

Brussels Bruxelles-National

Thu 10/15

9:55 am-9:04 pm

1 stop20h 09m

$868

SeattleBrussels

SEA - BRU

SEABRU

Seattle/Tacoma Intl

Mon 5/11

5:05 am-7:45 am

2 stops17h 40m

Brussels Bruxelles-National

Tue 5/19

9:30 am-7:00 pm

2 stops18h 30m

$870

SeattleBrussels

SEA - CRL

SEACRL

Seattle/Tacoma Intl

Mon 5/11

2:10 pm-8:35 pm

2 stops21h 25m

Charleroi Brussels

Tue 5/19

6:15 pm-5:45 pm

1 stop32h 30m

$1,011

SeattleBrussels

SEA - CRL

SEACRL

Seattle/Tacoma Intl

Wed 9/2

7:10 pm-10:15 pm

2 stops18h 05m

Charleroi Brussels

Fri 9/11

9:50 am-6:45 pm

3 stops41h 55m

$1,018

Flights are sorted by cheapest round-trip flights first.

Deals found on 4/26

Showing 1-10 of 29 resultsSorted by cheapest first
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Best time to book a flight from Seattle to Brussels

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

How far ahead should I book a flight from Seattle to Brussels?

The price you pay for your flight from Seattle to Brussels may vary depending on when you book. For the best chance of a lower fare, look to book 86 days in advance of your trip. Fares are likely to increase a fortnight or so before your departure date.

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

Currently, August is the cheapest month in which you can book a flight from Seattle to Brussels (average of $219). Flying from Seattle to Brussels in June is currently the most expensive (average of $439). 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 much does it cost to fly round-trip from Seattle to Brussels?

Reviews of airlines servicing Brussels

Get insights into the airlines that provide service to Brussels. 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 Brussels. Reviews last updated April 27, 2026.
Get a feel of what it's like to fly with Delta,KLM, andUnited Airlines from Seattle to Brussels by reading reviews from past customers. Users have also rated airlines in terms of entertainment options, comfort, food, crew/service, and boarding process.

Boarding

8.1

Crew

8.5

Overall

7.9

Entertainment

7.8

Food

7.2

Comfort

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.

Boarding

8.1

Crew

8.5

Overall

7.9

Entertainment

7.8

Food

7.2

Comfort

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.

Boarding

8.1

Crew

8.5

Overall

7.9

Entertainment

7.8

Food

7.2

Comfort

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.

Boarding

8.1

Crew

8.5

Overall

7.9

Entertainment

7.8

Food

7.2

Comfort

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.

Boarding

8.1

Crew

8.5

Overall

7.9

Entertainment

7.8

Food

7.2

Comfort

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.

Boarding

8.1

Crew

8.5

Overall

7.9

Entertainment

7.8

Food

7.2

Comfort

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 Seattle to Brussels. 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 from for flights from Seattle to Brussels?

    Most people fly from Seattle/Tacoma Intl (SEA) if they book a flight from Seattle to Brussels. On average, Seattle/Tacoma Intl has 0 outbound flights to Brussels per day from 8 airlines. Seattle/Tacoma Intl is conveniently located just 11.4 mi from Seattle’s city center.

  • How long is the flight from Seattle to Brussels?

    Icelandair and United Airlines can get you from Seattle to Brussels in just under 17h 13m. Your travel time can differ by up to 15h 42m. The distance between Seattle and Brussels is about 4941 mi. When browsing for deals, the options you’ll see will be for both nonstop flights and flights with stops.

  • What are the cheapest airlines flying from Seattle to Brussels round-trip?

    Icelandair, at $382, was found to be the cheapest airline from Seattle to Brussels.Alternate airlines to your destination round-trip include British Airways and United Airlines. Users have found that Icelandair is 37% cheaper than the other options available to this destination.

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

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

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

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

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

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

    Currently, August is the cheapest month in which you can book a flight from Seattle to Brussels (average of $219). Flying from Seattle to Brussels in June is currently the most expensive (average of $439). 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 Seattle to Brussels

See prices for flight routes from nearby airports that may be better suited for you.

Top 8 airlines flying from Seattle to Brussels

Discover the top 8 airlines that operate flights from Seattle to Brussels. 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 April 27, 2026.
AirlineCheapestAverageFlexibilityOn-time
IcelandairCheapest$382Average$484FlexibilityNo cancel feeOn-time76%
British AirwaysCheapest$421Average$686FlexibilityNo cancel feeOn-time70%
United AirlinesCheapest$470Average$745FlexibilityNo cancel feeOn-time69%
KLMCheapest$481Average$719FlexibilityNo cancel feeOn-time75%
DeltaCheapest$482Average$623FlexibilityNo cancel feeOn-timeN/A
Virgin AtlanticCheapest$488Average$491FlexibilityNo cancel feeOn-time72%
LufthansaCheapest$494Average$659FlexibilityNo cancel feeOn-time76%
Air CanadaCheapest$518Average$680FlexibilityNo cancel feeOn-time67%

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