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Bruxelles-National

$290+ 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 11/15. Fares are subject to change and may not be available on all flights or dates of travel.
SEA — BRU
Oct 11 — Oct 181
Sat 10/11
Sat 10/18
1 adult, Economy
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Cheapflights Tip: The best prices from Seattle/Tacoma Intl to Brussels Bruxelles-National are usually found in September or November, booked 64 days in advance, depart on a Tuesday or Monday and return on a Sunday

Cheap 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 September 11, 2025.

Round-trip from

$391
(oojo)

One-way from

$290
(Kiwi.com)

Popular in

June

Cheapest in

September

Average price

$527
From Seattle/Tacoma Intl to Brussels Bruxelles-National
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One-way flight from Seattle/Tacoma Intl to Brussels Bruxelles-National
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Highest demand for flights based on searches. 15% potential increase in price ($115 potential increase over avg. RT price).
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Cheapest flight prices on average. 3% potential price decrease ($20 potential savings vs. average RT price).
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Average for round-trip flights in September 2025
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Find 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 September 11, 2025.

This oojo deal was found by Cheapflights users on 9/11. 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.
Wed 11/192:35 pmSEA - BRU
1 stop12h 20mIcelandair
Thu 11/2712:50 pmBRU - SEA
1 stop13h 10mIcelandair
Deal found 9/11$391
This oojo deal was found by Cheapflights users on 9/10. 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 10/97:00 pmSEA - BRU
1 stop32h 50mIcelandair
Thu 10/231:50 pmBRU - SEA
1 stop13h 00mIcelandair
Deal found 9/10$393
This oojo deal was found by Cheapflights users on 9/11. 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 10/93:45 pmSEA - BRU
1 stop12h 05mIcelandair
Thu 10/161:50 pmBRU - SEA
1 stop15h 50mIcelandair
Deal found 9/11$401
This oojo deal was found by Cheapflights users on 9/11. 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 10/53:45 pmSEA - BRU
1 stop12h 05mIcelandair
Fri 10/101:50 pmBRU - SEA
1 stop15h 50mIcelandair
Deal found 9/11$407
This United Airlines deal was found by Cheapflights users on 9/11. 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.
Wed 11/127:00 amSEA - BRU
1 stop16h 55mUnited Airlines
Tue 11/1810:00 amBRU - SEA
2 stops43h 54mUnited Airlines
Deal found 9/11$435
This FlightHub deal was found by Cheapflights users on 9/11. 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.
Wed 11/195:50 amSEA - BRU
2 stops17h 00mMultiple Airlines
Thu 11/2710:00 amBRU - SEA
2 stops18h 16mMultiple Airlines
Deal found 9/11$443
This KLM deal was found by Cheapflights users on 9/10. 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 KLM is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Wed 11/127:20 amSEA - BRU
1 stop16h 40mKLM
Tue 11/1811:00 amBRU - SEA
1 stop20h 25mKLM
Deal found 9/10$457
This KLM deal was found by Cheapflights users on 9/11. 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 KLM is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Wed 11/127:20 amSEA - BRU
1 stop16h 40mMultiple Airlines
Tue 11/1811:00 amBRU - SEA
1 stop18h 06mMultiple Airlines
Deal found 9/11$458
This Cheapflightsfares deal was found by Cheapflights users on 9/11. 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 11/193:10 pmSEA - BRU
1 stop13h 00mLufthansa
Thu 11/2710:00 amBRU - SEA
2 stops18h 16mLufthansa
Deal found 9/11$465
This Mytrip deal was found by Cheapflights users on 9/10. 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 10/810:00 amSEA - BRU
2 stops19h 15mMultiple Airlines
Wed 10/1510:00 amBRU - SEA
2 stops20h 45mMultiple Airlines
Deal found 9/10$469

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 September 11, 2025.
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

Sun 10/5

3:45 pm-12:50 pm

1 stop12h 05m

Brussels Bruxelles-National

Fri 10/10

1:50 pm-8:40 pm

1 stop15h 50m

$407

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-11:40 am

2 stops33h 40m

$435

SeattleBrussels

SEA - BRU

SEABRU

Seattle/Tacoma Intl

Wed 11/12

8:00 am-7:15 am

1 stop14h 15m

Brussels Bruxelles-National

Tue 11/18

10:00 am-11:28 am

2 stops34h 28m

$435

SeattleBrussels

SEA - BRU

SEABRU

Seattle/Tacoma Intl

Wed 11/19

5:50 am-7:50 am

2 stops17h 00m

Brussels Bruxelles-National

Thu 11/27

10:00 am-7:16 pm

2 stops18h 16m

$443

SeattleBrussels

SEA - BRU

SEABRU

Seattle/Tacoma Intl

Tue 3/3

7:00 am-8:55 am

1 stop16h 55m

Brussels Bruxelles-National

Wed 4/1

10:45 am-8:10 pm

1 stop18h 25m

$457

SeattleBrussels

SEA - BRU

SEABRU

Seattle/Tacoma Intl

Sat 11/15

10:05 am-9:00 am

2 stops37h 55m

$290

SeattleBrussels

SEA - BRU

SEABRU

Seattle/Tacoma Intl

Sun 11/16

8:48 am-9:00 am

2 stops39h 12m

$290

SeattleBrussels

SEA - BRU

SEABRU

Seattle/Tacoma Intl

Fri 10/17

10:00 pm-9:00 am

3 stops50h 00m

$302

SeattleBrussels

SEA - BRU

SEABRU

Seattle/Tacoma Intl

Mon 11/17

10:05 am-8:20 pm

2 stops25h 15m

$311

SeattleBrussels

SEA - BRU

SEABRU

Seattle/Tacoma Intl

Tue 11/18

7:00 am-2:35 pm

3 stops22h 35m

$326

Flights are sorted by cheapest round-trip flights first.

Deals found on 9/11

Showing 1-10 of 15 results
1
2

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 August 29, 2025.

The best time to book flights from Seattle to Brussels Bruxelles-National Airport is 64 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, November is the cheapest month in which you can book a flight from Seattle to Brussels Bruxelles-National Airport (average of $614). Flying from Seattle to Brussels Bruxelles-National Airport in June is currently the most expensive (average of $1,077). 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.

What is the cheapest time of day to fly from SEA to BRU?

Find hourly flight availability from Seattle to Bruxelles-National. Discover flight options and departure times throughout the day, allowing you to choose a departure time that suits your schedule. Data last updated September 11, 2025.

It’s optimal to fly from Seattle to Brussels Bruxelles-National Airport in the morning. By choosing this option you can save up to 10% on the cost of your flight, compared to a flight at noon.

What is the cheapest day to fly from Seattle to Brussels Bruxelles-National Airport?

Use this chart to determine the cheapest time to fly round-trip from Seattle to Bruxelles-National. Price data was last updated on December 16, 2024.

Travelers seeking maximum savings on their Seattle to Brussels Bruxelles-National Airport flight should consider departing on Sunday evenings when fares are most often at their lowest. Friday afternoons flights should be avoided if possible as fares are typically the most expensive at this time.

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 September 11, 2025.
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
7.8
Good
1,385 reviews

Boarding

7.8

Crew

8.4

Entertainment

7.2

Overall

7.8

Comfort

7.7

Food

7.3

Reviews

1 / 20
4.0
Okay

Mark,Sep 2025

AMS - BHX

Crew and snacks were good, boarding wasn't great as busses were used rather than boarding tunnels. Also endured a one hour delay.
KLM
7.8
Good
1,385 reviews
KLM
7.8
Good
1,385 reviews

Boarding

7.8

Crew

8.4

Entertainment

7.2

Overall

7.8

Comfort

7.7

Food

7.3

Reviews

1 / 20
4.0
Okay

Mark,Sep 2025

AMS - BHX

Crew and snacks were good, boarding wasn't great as busses were used rather than boarding tunnels. Also endured a one hour delay.
United Airlines
7.4
Good
8,937 reviews
KLM
7.8
Good
1,385 reviews

Boarding

7.8

Crew

8.4

Entertainment

7.2

Overall

7.8

Comfort

7.7

Food

7.3

Reviews

1 / 20
4.0
Okay

Mark,Sep 2025

AMS - BHX

Crew and snacks were good, boarding wasn't great as busses were used rather than boarding tunnels. Also endured a one hour delay.
Icelandair
7.0
Good
546 reviews
KLM
7.8
Good
1,385 reviews

Boarding

7.8

Crew

8.4

Entertainment

7.2

Overall

7.8

Comfort

7.7

Food

7.3

Reviews

1 / 20
4.0
Okay

Mark,Sep 2025

AMS - BHX

Crew and snacks were good, boarding wasn't great as busses were used rather than boarding tunnels. Also endured a one hour delay.
Lufthansa
6.8
Okay
7,409 reviews
KLM
7.8
Good
1,385 reviews

Boarding

7.8

Crew

8.4

Entertainment

7.2

Overall

7.8

Comfort

7.7

Food

7.3

Reviews

1 / 20
4.0
Okay

Mark,Sep 2025

AMS - BHX

Crew and snacks were good, boarding wasn't great as busses were used rather than boarding tunnels. Also endured a one hour delay.
British Airways
6.7
Okay
7,361 reviews
KLM
7.8
Good
1,385 reviews

Boarding

7.8

Crew

8.4

Entertainment

7.2

Overall

7.8

Comfort

7.7

Food

7.3

Reviews

1 / 20
4.0
Okay

Mark,Sep 2025

AMS - BHX

Crew and snacks were good, boarding wasn't great as busses were used rather than boarding tunnels. Also endured a one hour delay.

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 11 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 12h 05m. The distance from Seattle to Brussels Bruxelles-National Airport is about 4941 mi. Both multi-stop and nonstop flights can be found to your destination and back.

  • 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 $391. Other airlines that can offer you cheap pricing are Virgin Atlantic, from $488, and British Airways, from $501. These flights start at 37% lower than the current average price 3 months from now.

  • 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, November is the cheapest month in which you can book a flight from Seattle to Brussels Bruxelles-National Airport (average of $614). Flying from Seattle to Brussels Bruxelles-National Airport in June is currently the most expensive (average of $1,077). 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
Charleroi
Mons
Mechelen
Zaventem

Browse thousands of different options on Cheapflights for your next trip

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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 10 airlines flying from Seattle to Bruxelles-National

Discover the top 10 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 September 11, 2025.
AirlineCheapestAverageFlexibilityOn-time
IcelandairCheapest$391Average$497FlexibilityNo cancel feeOn-time76%
Virgin AtlanticCheapest$488Average$491FlexibilityNo cancel feeOn-time72%
British AirwaysCheapest$501Average$710FlexibilityNo cancel feeOn-time70%
United AirlinesCheapest$502Average$715FlexibilityNo cancel feeOn-time69%
Air FranceCheapest$506Average$665FlexibilityNo cancel feeOn-time77%
DeltaCheapest$514Average$722FlexibilityNo cancel feeOn-timeN/A
KLMCheapest$521Average$669FlexibilityNo cancel feeOn-time75%
Aer LingusCheapest$532Average$556FlexibilityNo cancel feeOn-timeN/A
Air CanadaCheapest$543Average$740FlexibilityNo cancel feeOn-time67%
LufthansaCheapest$561Average$731FlexibilityNo cancel feeOn-time76%

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