HomeSearch by dateVacation packagesHotelsFlight dealsCar rentalTravel tips & news
Bruxelles-National

$269+ Cheap flights from Seattle (SEA) to Bruxelles-National (BRU)

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 3/5. Fares are subject to change and may not be available on all flights or dates of travel.
SEA — BRU
Feb 20 — Feb 271
Fri 2/20
Fri 2/27
1 adult, Economy
We work with more than 300 partners to bring you better travel deals

Find cheap flights from Seattle to Bruxelles-National with Cheapflights

1. Tell us where you want to go

Enter your travel information like dates, passengers, trip type (one-way or round trip), and preferred cabin class then click “Find deals”

2. Select your favorite providers

We find the providers serving your travel needs. Choose up to four travel providers to compare side-by-side for flights, hotels, or car rentals.

3. Compare prices and book

Review each provider’s pricing and select the best option for you! Book through your favorite provider’s website for a seamless experience.

Cheap flight deals from Seattle to Bruxelles-National

Cheapest flights from Seattle to Bruxelles-National
Explore the most affordable flight options available from Seattle to Bruxelles-National. Find the lowest fares from popular airlines and budget airlines, with prices last updated on January 21, 2026.

This oojo deal was found by Cheapflights users on 1/20. 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 stop13h 05m
Icelandair
Deal found 1/20$405
This oojo deal was found by Cheapflights users on 1/19. 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 stop15h 50m
Icelandair
Deal found 1/19$406
This FlightHub deal was found by Cheapflights users on 1/21. 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.
Fri 5/83:40 pm
SEA
-
BRU
1 stop12h 15m
Icelandair
Fri 5/151:50 pm
BRU
-
SEA
1 stop13h 05m
Icelandair
Deal found 1/21$409
This FlightHub deal was found by Cheapflights users on 1/21. 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.
Fri 5/83:40 pm
SEA
-
BRU
1 stop12h 15m
Icelandair
Sat 5/161:50 pm
BRU
-
SEA
1 stop13h 05m
Icelandair
Deal found 1/21$410
This Mytrip deal was found by Cheapflights users on 1/19. 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.
Mon 1/265:50 am
SEA
-
BRU
2 stops17h 00m
Air Canada
Tue 2/1010:00 am
BRU
-
SEA
2 stops21h 16m
Air Canada
Deal found 1/19$424
This Flighttix deal was found by Cheapflights users on 1/19. 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 Flighttix is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Sat 5/93:40 pm
SEA
-
BRU
1 stop12h 15m
Icelandair
Fri 5/221:50 pm
BRU
-
SEA
1 stop13h 05m
Icelandair
Deal found 1/19$429
This Icelandair deal was found by Cheapflights users on 1/21. 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.
Tue 5/53:40 pm
SEA
-
BRU
1 stop12h 15m
Icelandair
Fri 5/151:50 pm
BRU
-
SEA
1 stop15h 50m
Icelandair
Deal found 1/21$432
This Icelandair deal was found by Cheapflights users on 1/21. 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.
Tue 5/53:40 pm
SEA
-
BRU
1 stop12h 15m
Icelandair
Sat 5/161:50 pm
BRU
-
SEA
1 stop15h 50m
Icelandair
Deal found 1/21$433
This KAYAK deal was found by Cheapflights users on 1/21. 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.
Mon 5/47:00 pm
SEA
-
BRU
1 stop32h 55m
Icelandair
Mon 5/181:50 pm
BRU
-
SEA
1 stop13h 05m
Icelandair
Deal found 1/21$434
This Kiwi.com deal was found by Cheapflights users on 1/21. 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 2/22:00 pm
SEA
-
BRU
1 stop18h 30m
Lufthansa
Wed 2/1810:00 am
BRU
-
SEA
2 stops18h 22m
Lufthansa
Deal found 1/21$435
This Icelandair deal was found by Cheapflights users on 1/19. 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.
Fri 5/83:40 pm
SEA
-
BRU
1 stop12h 15m
Icelandair
Fri 5/221:50 pm
BRU
-
SEA
1 stop13h 05m
Icelandair
Deal found 1/19$437
This United Airlines deal was found by Cheapflights users on 1/20. 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.
Sat 3/711:47 pm
SEA
-
BRU
1 stop23h 08m
United Airlines
Tue 3/1710:00 am
BRU
-
SEA
2 stops42h 56m
United Airlines
Deal found 1/20$438

Find flight deals from Seattle to Bruxelles-National

Discover tips and strategies to find the most affordable flight options for your journey from Seattle (SEA) to Bruxelles-National (BRU). 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 21, 2026.

Most accurate provider

oojo
3 stars

Most trusted provider

oojo
3 stars

Round-trip from

$405
(oojo)

One-way from

$269
(Mytrip)

Popular in

December

Cheapest in

October

Average price

$516
Provider with most accurate pricing for Seattle/Tacoma Intl-Brussels Bruxelles-National flight deals.
Search Deals
Provider most trusted by Cheapflights users for Seattle/Tacoma Intl-Brussels Bruxelles-National flights.
Search Deals
From Seattle/Tacoma Intl to Brussels Bruxelles-National
Search Deals
One-way flight from Seattle/Tacoma Intl to Brussels Bruxelles-National
Search Deals
Highest demand for flights based on searches. 2% potential increase in price ($16 potential increase over avg. RT price).
Search Deals
Cheapest flight prices on average. 3% potential price decrease ($21 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 Bruxelles-National 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 21, 2026.
Use the filters below to find and compare flights from Seattle to Brussels Bruxelles-National Airport that are best for you.

Fly from

Seattle

Fly to

Bruxelles-National

Route

Depart

Return

Price

SeattleBrussels

SEA - BRU

SEABRU

Seattle/Tacoma Intl

Sat 3/7

11:47 pm-7:55 am

1 stop23h 08m

Brussels Bruxelles-National

Tue 3/17

10:00 am-8:56 pm

2 stops42h 56m

$438

SeattleBrussels

SEA - BRU

SEABRU

Seattle/Tacoma Intl

Tue 2/10

10:58 am-8:55 am

1 stop12h 57m

Brussels Bruxelles-National

Tue 3/10

10:00 am-8:56 pm

2 stops42h 56m

$438

SeattleBrussels

SEA - BRU

SEABRU

Seattle/Tacoma Intl

Mon 1/26

12:57 pm-8:55 am

2 stops34h 58m

Brussels Bruxelles-National

Tue 2/10

10:10 am-6:16 pm

1 stop17h 06m

$449

SeattleBrussels

SEA - BRU

SEABRU

Seattle/Tacoma Intl

Mon 2/2

7:00 am-8:05 am

1 stop16h 05m

Brussels Bruxelles-National

Wed 2/18

10:10 am-10:43 pm

1 stop21h 33m

$453

SeattleBrussels

SEA - BRU

SEABRU

Seattle/Tacoma Intl

Tue 4/14

11:59 pm-9:00 am

1 stop24h 01m

Brussels Bruxelles-National

Tue 4/28

9:40 am-9:51 pm

1 stop21h 11m

$456

SeattleBrussels

SEA - BRU

SEABRU

Seattle/Tacoma Intl

Tue 3/3

8:17 am-7:15 am

1 stop13h 58m

Brussels Bruxelles-National

Wed 4/1

12:00 pm-8:53 pm

1 stop17h 53m

$457

SeattleBrussels

SEA - BRU

SEABRU

Seattle/Tacoma Intl

Tue 3/3

7:15 am-7:45 pm

2 stops27h 30m

Brussels Bruxelles-National

Wed 4/1

9:15 pm-11:13 pm

2 stops34h 58m

$458

SeattleBrussels

SEA - BRU

SEABRU

Seattle/Tacoma Intl

Sat 2/7

8:00 pm-7:50 am

2 stops50h 50m

Brussels Bruxelles-National

Fri 3/27

10:00 am-10:16 pm

2 stops44h 16m

$458

SeattleBrussels

SEA - BRU

SEABRU

Seattle/Tacoma Intl

Thu 3/5

2:35 pm-11:55 am

1 stop12h 20m

$269

SeattleBrussels

SEA - BRU

SEABRU

Seattle/Tacoma Intl

Thu 3/5

2:35 pm-9:10 pm

3 stops45h 35m

$293

Flights are sorted by cheapest round-trip flights first.

Deals found on 1/19

Showing 1-10 of 14 results
1
2

Compare providers for flights from Seattle to Bruxelles-National

Provider information is updated monthly. Please note that these providers often have deals for this flight, but the availability may vary on a day-by-day basis on Cheapflights.
Use the table below to compare price accuracy, trust ratings, and cancellation policies for each provider offering flight deals from Seattle to Bruxelles-National in January.
ProviderPrice AccuracyTrust Score*
FlightHubPrice Accuracy3 starsTrust Score*1 star
AranGrantPrice Accuracy2 starsTrust Score*3 stars
oojoPrice Accuracy3 starsTrust Score*3 stars
OvagoPrice Accuracy2 starsTrust Score*2 stars
Justfly.comPrice Accuracy3 starsTrust Score*3 stars

*The Trust Score is based on feedback from users after their booking experience. It measures overall satisfaction, helping us identify issues like hidden fees, problems during the ticketing process, and the quality of customer service. This score is our best indicator of the provider's quality and reliability.

  • Most accurate provider: When it comes to deals on Seattle-Brussels Bruxelles-National Airport flights, users find the pricing of oojo to be most consistent on Cheapflights vs. oojo Users can find the same prices on Seattle-Brussels Bruxelles-National Airport flight deals on Cheapflights vs. oojo >95% of the time. Price accuracy is based on data collected from Seattle-Brussels Bruxelles-National Airport flight searches over the past month and is updated monthly.
  • Most trusted provider: When it comes to deals on Seattle-Brussels Bruxelles-National Airport flights, Cheapflights users trust oojo the most. oojo has received a user feedback score of 3 out of 3 stars (3 being the best), meaning they have been trusted the most by Cheapflights users looking for Seattle-Brussels Bruxelles-National Airport flight deals. Provider user feedback score is based on Cheapflights searches over the past month and is updated monthly.

Best time to book a flight from Seattle to Bruxelles-National

Have a flexible travel schedule? Discover the best time to fly to Bruxelles-National 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 Bruxelles-National Airport

How far ahead should I book a flight from Seattle to Brussels Bruxelles-National Airport?

Use this chart to determine the optimal time to book a round-trip flight from Seattle to Bruxelles-National. Price data was last updated on January 16, 2026.

The best time to book flights from Seattle to Brussels Bruxelles-National Airport is 38 days before your desired departure date. The cost of your flight will likely increase significantly if you book two weeks in advance of your flight.

What is the cheapest month to book a flight from Seattle to Brussels Bruxelles-National Airport?

Currently, January is the cheapest month in which you can book a flight from Seattle to Brussels Bruxelles-National Airport (average of $378). Flying from Seattle to Brussels Bruxelles-National Airport 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.

How much does it cost to fly round-trip from Seattle to Brussels Bruxelles-National Airport?

Reviews of airlines servicing Bruxelles-National

Get insights into the airlines that provide service to Bruxelles-National. 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 Bruxelles-National. Reviews last updated January 21, 2026.
Peruse reviews from past customers who have flown with KLM, United Airlines, and Icelandair from Seattle to Brussels Bruxelles-National Airport 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.
KLM
7.7
Good
1,442 reviews

Crew

8.4

Comfort

7.6

Boarding

7.8

Overall

7.7

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
1,442 reviews
KLM
7.7
Good
1,442 reviews

Crew

8.4

Comfort

7.6

Boarding

7.8

Overall

7.7

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
9,191 reviews
KLM
7.7
Good
1,442 reviews

Crew

8.4

Comfort

7.6

Boarding

7.8

Overall

7.7

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
602 reviews
KLM
7.7
Good
1,442 reviews

Crew

8.4

Comfort

7.6

Boarding

7.8

Overall

7.7

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
7,738 reviews
KLM
7.7
Good
1,442 reviews

Crew

8.4

Comfort

7.6

Boarding

7.8

Overall

7.7

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
7,689 reviews
KLM
7.7
Good
1,442 reviews

Crew

8.4

Comfort

7.6

Boarding

7.8

Overall

7.7

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 Bruxelles-National. 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 Bruxelles-National?

    Seattle/Tacoma Intl (SEA) is the airport you will fly out of if you book a flight from Seattle to Brussels Bruxelles-National. You should not have trouble finding flights to Brussels Bruxelles-National from Seattle/Tacoma Intl; the airport handles an average of 0 outbound flights to Brussels Bruxelles-National per day. You should also have plenty of airline options to choose from since 9 airlines have flights from the Seattle airport to Brussels Bruxelles-National. It is only a 11.4 mi journey to Seattle/Tacoma Intl (SEA) from Seattle’s city center.

  • How long is the flight from Seattle to Brussels Bruxelles-National Airport?

    Departing from Seattle to Brussels Bruxelles-National Airport will take you 23h 08m. The distance from Seattle to Brussels Bruxelles-National Airport is about 4941 mi.

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

    Cheapflights users have booked flights from Seattle to Brussels Bruxelles-National Airport round-trip from $385. Other airlines that can offer you cheap pricing are British Airways, from $474, and Delta, from $482. These flights start at 37% lower than the current average price 3 months from now.

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

    To fly one-way, consider booking your trip with Icelandair, which is currently one of the cheapest options available, starting at $175. United Airlines flights start at $324 while deals on KLM start at $373 one-way.

  • Can I find deals for flights from Seattle to Bruxelles-National that include hotel bookings?

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

  • How can I find direct flights from Seattle to Bruxelles-National?

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

  • Can I find deals for business class flights from Seattle to Bruxelles-National?

    Yes. Cheapflights offers flight deals from Seattle to Bruxelles-National 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 Bruxelles-National Airport?

    Currently, January is the cheapest month in which you can book a flight from Seattle to Brussels Bruxelles-National Airport (average of $378). Flying from Seattle to Brussels Bruxelles-National Airport 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

Traveling to a place near Brussels Bruxelles-National Airport?

Book flights to Brussels Bruxelles-National Airport if you plan to visit one of these locations
Mons
Hasselt
Charleroi
Mechelen
Zaventem

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 Bruxelles-National

See prices for flight routes from nearby airports that may be better suited for you.
Portland to Bruxelles-National flights
Seattle to Charleroi Brussels flights
Portland to Charleroi Brussels flights

Top 9 airlines flying from Seattle to Bruxelles-National

Discover the top 9 airlines that operate flights from Seattle to Bruxelles-National. 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 21, 2026.
AirlineCheapestAverageFlexibilityOn-time
IcelandairCheapest$385Average$484FlexibilityNo 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$678FlexibilityNo cancel feeOn-time76%
KLMCheapest$508Average$680FlexibilityNo cancel feeOn-time75%
Air CanadaCheapest$518Average$808FlexibilityNo cancel feeOn-time67%
Aer LingusCheapest$536Average$592FlexibilityNo cancel feeOn-timeN/A

100% Free

Cheapflights is completely free to use, so you can start saving the moment you arrive.

Book with Flexibility

Our users can plan ahead with confidence and find flights with no change fees

Travel Smart

Millions of people come to us for their flight needs every year. We help make travel planning easy by providing useful insights and data-driven graphs that can inform your decisions.