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$230+ 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 3/27. Fares are subject to change and may not be available on all flights or dates of travel.
SEA — BRU
Feb 28 — Mar 71
Sat 2/28
Sat 3/7
1 adult, Economy
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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 January 29, 2026.

This oojo deal was found by Cheapflights users on 1/28. 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.
Thu 5/73:40 pm
SEA
-
BRU
1 stop12h 15m
Icelandair
Fri 5/151:50 pm
BRU
-
SEA
1 stop15h 50m
Icelandair
Deal found 1/28$407
This oojo deal was found by Cheapflights users on 1/28. 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.
Fri 5/17:00 pm
SEA
-
BRU
1 stop32h 55m
Icelandair
Sun 5/101:50 pm
BRU
-
SEA
1 stop13h 05m
Icelandair
Deal found 1/28$408
This Cheapflightsfares deal was found by Cheapflights users on 1/27. 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 4/223:40 pm
SEA
-
BRU
1 stop12h 15m
Icelandair
Thu 5/71:50 pm
BRU
-
SEA
1 stop15h 50m
Icelandair
Deal found 1/27$416
This KAYAK deal was found by Cheapflights users on 1/28. 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.
Wed 2/42:35 pm
SEA
-
BRU
1 stop12h 20m
Icelandair
Thu 2/1212:50 pm
BRU
-
SEA
1 stop13h 10m
Icelandair
Deal found 1/28$426
This oojo deal was found by Cheapflights users on 1/27. 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 5/33:40 pm
SEA
-
BRU
1 stop12h 15m
Icelandair
Sat 5/161:50 pm
BRU
-
SEA
1 stop13h 05m
Icelandair
Deal found 1/27$447
This oojo deal was found by Cheapflights users on 1/28. 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 3/317:00 pm
SEA
-
BRU
1 stop32h 55m
Icelandair
Mon 4/201:50 pm
BRU
-
SEA
1 stop15h 50m
Icelandair
Deal found 1/28$452
This FlightHub deal was found by Cheapflights users on 1/26. 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 FlightHub is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Mon 5/47:00 pm
SEA
-
BRU
1 stop32h 55m
Icelandair
Wed 5/271:50 pm
BRU
-
SEA
1 stop15h 50m
Icelandair
Deal found 1/26$453
This KAYAK deal was found by Cheapflights users on 1/26. 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 5/23:40 pm
SEA
-
BRU
1 stop12h 15m
Icelandair
Mon 5/251:50 pm
BRU
-
SEA
1 stop15h 50m
Icelandair
Deal found 1/26$474
This Mytrip deal was found by Cheapflights users on 1/28. 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 2/255:45 am
SEA
-
BRU
2 stops17h 05m
Multiple Airlines
Wed 3/46:45 am
BRU
-
SEA
1 stop15h 35m
Multiple Airlines
Deal found 1/28$476
This Mytrip deal was found by Cheapflights users on 1/27. 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.
Fri 2/273:10 pm
SEA
-
CRL
2 stops22h 00m
Multiple Airlines
Fri 3/64:30 pm
CRL
-
SEA
2 stops28h 40m
Multiple Airlines
Deal found 1/27$777
This Mytrip deal was found by Cheapflights users on 1/27. 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.
Thu 4/25:50 am
SEA
-
CRL
3 stops30h 40m
Multiple Airlines
Fri 4/109:55 pm
CRL
-
SEA
3 stops32h 56m
Multiple Airlines
Deal found 1/27$920
This Mytrip deal was found by Cheapflights users on 1/28. 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.
Fri 1/303:10 pm
SEA
-
CRL
2 stops21h 05m
Multiple Airlines
Sun 2/13:20 pm
CRL
-
SEA
2 stops29h 50m
Multiple Airlines
Deal found 1/28$944

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 January 29, 2026.

Round-trip from

$407
(oojo)

One-way from

$230
(oojo)

Popular in

December

Cheapest in

October

Average price

$516
From Seattle/Tacoma Intl to Brussels
Search Deals
One-way flight from Seattle/Tacoma Intl to Brussels
Search Deals
Highest demand for flights based on searches. 3% potential increase in price ($20 potential increase over avg. RT price).
Search Deals
Cheapest flight prices on average. 3% potential price decrease ($22 potential savings vs. average RT price).
Search Deals
Average for round-trip flights in January 2026
Search Deals

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 January 29, 2026.
Use the filters below to find and compare flights from Seattle to Brussels that are best for you.

Fly from

Seattle

Fly to

Brussels

Route

Depart

Return

Price

SeattleBrussels

SEA - BRU

SEABRU

Seattle/Tacoma Intl

Sun 5/3

3:40 pm-12:55 pm

1 stop12h 15m

Brussels Bruxelles-National

Wed 5/27

1:50 pm-8:40 pm

1 stop15h 50m

$474

SeattleBrussels

SEA - BRU

SEABRU

Seattle/Tacoma Intl

Thu 5/7

3:40 pm-12:55 pm

1 stop12h 15m

Brussels Bruxelles-National

Wed 5/27

1:50 pm-8:40 pm

1 stop15h 50m

$474

SeattleBrussels

SEA - BRU

SEABRU

Seattle/Tacoma Intl

Wed 4/22

12:54 pm-1:15 pm

2 stops15h 21m

Brussels Bruxelles-National

Thu 5/7

7:00 am-2:20 pm

2 stops16h 20m

$501

SeattleBrussels

SEA - BRU

SEABRU

Seattle/Tacoma Intl

Tue 3/31

3:40 pm-8:00 pm

2 stops19h 20m

Brussels Bruxelles-National

Wed 4/22

8:30 am-12:20 pm

1 stop12h 50m

$504

SeattleBrussels

SEA - BRU

SEABRU

Seattle/Tacoma Intl

Wed 3/25

5:00 am-1:15 pm

2 stops24h 15m

Brussels Bruxelles-National

Wed 4/1

9:25 am-7:00 pm

2 stops42h 35m

$515

SeattleBrussels

SEA - BRU

SEABRU

Seattle/Tacoma Intl

Tue 5/5

3:00 pm-8:00 pm

2 stops20h 00m

Brussels Bruxelles-National

Tue 5/26

7:00 am-12:20 pm

1 stop14h 20m

$527

SeattleBrussels

SEA - BRU

SEABRU

Seattle/Tacoma Intl

Wed 5/6

3:40 pm-12:55 pm

1 stop12h 15m

Brussels Bruxelles-National

Tue 5/26

1:50 pm-8:40 pm

1 stop15h 50m

$528

SeattleBrussels

SEA - BRU

SEABRU

Seattle/Tacoma Intl

Sat 4/25

8:00 pm-8:00 pm

2 stops39h 00m

Brussels Bruxelles-National

Sun 5/3

9:25 am-10:59 pm

2 stops46h 34m

$530

SeattleBrussels

SEA - BRU

SEABRU

Seattle/Tacoma Intl

Sat 5/2

11:48 pm-7:10 am

2 stops22h 22m

Brussels Bruxelles-National

Wed 5/27

9:25 am-7:37 pm

1 stop19h 12m

$534

SeattleBrussels

SEA - BRU

SEABRU

Seattle/Tacoma Intl

Sat 5/2

11:14 pm-7:25 am

1 stop23h 11m

Brussels Bruxelles-National

Tue 5/26

7:00 am-2:20 pm

2 stops16h 20m

$535

Flights are sorted by cheapest round-trip flights first.

Deals found on 1/28

Showing 1-10 of 32 results
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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?

Use this chart to determine the optimal time to book a round-trip flight from Seattle to Brussels. Price data was last updated on January 23, 2026.

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 38 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, January is the cheapest month in which you can book a flight from Seattle to Brussels (average of $378). Flying from Seattle to Brussels in July is currently the most expensive (average of $505). 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 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 January 29, 2026.
Get a feel of what it's like to fly with KLM, United Airlines, and Icelandair 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.
KLM
7.7
Good
1,443 reviews

Overall

7.7

Crew

8.4

Boarding

7.8

Comfort

7.6

Entertainment

7.1

Food

7.3

Reviews

1 / 20
10.0
Excellent

Snapyou,Jan 2026

TPA - LHR

Flight operated by Virgin Atlantic - usual high standard service by Virgin.
KLM
7.7
Good
1,443 reviews
KLM
7.7
Good
1,443 reviews

Overall

7.7

Crew

8.4

Boarding

7.8

Comfort

7.6

Entertainment

7.1

Food

7.3

Reviews

1 / 20
10.0
Excellent

Snapyou,Jan 2026

TPA - LHR

Flight operated by Virgin Atlantic - usual high standard service by Virgin.
United Airlines
7.4
Good
9,215 reviews
KLM
7.7
Good
1,443 reviews

Overall

7.7

Crew

8.4

Boarding

7.8

Comfort

7.6

Entertainment

7.1

Food

7.3

Reviews

1 / 20
10.0
Excellent

Snapyou,Jan 2026

TPA - LHR

Flight operated by Virgin Atlantic - usual high standard service by Virgin.
Icelandair
7.1
Good
606 reviews
KLM
7.7
Good
1,443 reviews

Overall

7.7

Crew

8.4

Boarding

7.8

Comfort

7.6

Entertainment

7.1

Food

7.3

Reviews

1 / 20
10.0
Excellent

Snapyou,Jan 2026

TPA - LHR

Flight operated by Virgin Atlantic - usual high standard service by Virgin.
Lufthansa
6.8
Okay
7,756 reviews
KLM
7.7
Good
1,443 reviews

Overall

7.7

Crew

8.4

Boarding

7.8

Comfort

7.6

Entertainment

7.1

Food

7.3

Reviews

1 / 20
10.0
Excellent

Snapyou,Jan 2026

TPA - LHR

Flight operated by Virgin Atlantic - usual high standard service by Virgin.
British Airways
6.7
Okay
7,705 reviews
KLM
7.7
Good
1,443 reviews

Overall

7.7

Crew

8.4

Boarding

7.8

Comfort

7.6

Entertainment

7.1

Food

7.3

Reviews

1 / 20
10.0
Excellent

Snapyou,Jan 2026

TPA - LHR

Flight operated by Virgin Atlantic - usual high standard service by Virgin.

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 9 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 12h 15m. Your travel time can differ by up to 3h 06m. 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 $385, was found to be the cheapest airline from Seattle to Brussels.Alternate airlines to your destination round-trip include British Airways and Delta. Users have found that Icelandair is 37% cheaper than the other options available to this destination.

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

    The cheapest airline one-way is Icelandair, with whom users have recently found tickets for as low as $175. However, be on the lookout for offers from United Airlines and KLM, as they are both options that can get you from Seattle to Brussels for a low price.

  • 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, January is the cheapest month in which you can book a flight from Seattle to Brussels (average of $378). Flying from Seattle to Brussels in July is currently the most expensive (average of $505). 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.
Seattle to Bruxelles-National flights
Portland to Bruxelles-National flights
Seattle to Charleroi Brussels flights
Portland to Charleroi Brussels flights
Portland to Antwerp flights

Top 9 airlines flying from Seattle to Brussels

Discover the top 9 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 January 29, 2026.
AirlineCheapestAverageFlexibilityOn-time
IcelandairCheapest$385Average$483FlexibilityNo cancel feeOn-time76%
British AirwaysCheapest$474Average$727FlexibilityNo cancel feeOn-time70%
DeltaCheapest$482Average$683FlexibilityNo cancel feeOn-timeN/A
United AirlinesCheapest$483Average$723FlexibilityNo cancel feeOn-time69%
Virgin AtlanticCheapest$488Average$491FlexibilityNo cancel feeOn-time72%
LufthansaCheapest$494Average$684FlexibilityNo cancel feeOn-time76%
KLMCheapest$508Average$696FlexibilityNo cancel feeOn-time75%
Air CanadaCheapest$518Average$808FlexibilityNo cancel feeOn-time67%
Aer LingusCheapest$536Average$592FlexibilityNo cancel feeOn-timeN/A

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