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Bruxelles-National

$323+ 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 1/24. Fares are subject to change and may not be available on all flights or dates of travel.
SEA — BRU
Jan 11 — Jan 181
Sun 1/11
Sun 1/18
1 adult, Economy
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Cheapflights Tip: The best prices from Seattle/Tacoma Intl to Brussels Bruxelles-National are usually found in October or September, booked 64 days in advance, depart on a Tuesday or Monday and return on a Sunday

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 December 12, 2025.

This Cheapflightsfares deal was found by Cheapflights users on 12/11. 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 12/313:10 pmSEA - BRU
1 stop13h 00mLufthansa
Wed 1/710:00 amBRU - SEA
2 stops18h 16mLufthansa
Deal found 12/11$750
This Expedia deal was found by Cheapflights users on 12/9. 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 Expedia is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Thu 12/258:10 amSEA - BRU
2 stops24h 20mMultiple Airlines
Thu 1/89:10 pmBRU - SEA
2 stops34h 06mMultiple Airlines
Deal found 12/9$799
This United Airlines deal was found by Cheapflights users on 12/10. 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 United Airlines is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Fri 12/125:00 amSEA - BRU
2 stops23h 15mUnited Airlines
Fri 12/199:35 amBRU - SEA
2 stops24h 24mUnited Airlines
Deal found 12/10$811
This United Airlines deal was found by Cheapflights users on 12/9. 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.
Thu 12/2512:37 pmSEA - BRU
2 stops15h 38mUnited Airlines
Thu 1/81:50 pmBRU - SEA
1 stop32h 30mUnited Airlines
Deal found 12/9$843
This United Airlines deal was found by Cheapflights users on 12/11. 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.
Sat 12/137:00 amSEA - BRU
1 stop16h 05mUnited Airlines
Sun 12/217:00 amBRU - SEA
2 stops24h 16mUnited Airlines
Deal found 12/11$859
This Booking.com deal was found by Cheapflights users on 12/10. 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 Booking.com is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Fri 12/1210:40 amSEA - BRU
1 stop13h 15mMultiple Airlines
Fri 12/196:45 amBRU - SEA
1 stop15h 35mMultiple Airlines
Deal found 12/10$862
This Expedia deal was found by Cheapflights users on 12/9. 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 Expedia is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Wed 12/248:00 pmSEA - BRU
2 stops26h 50mMultiple Airlines
Thu 1/89:10 pmBRU - SEA
2 stops34h 06mMultiple Airlines
Deal found 12/9$876

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 December 12, 2025.

Most accurate provider

eDreams
3 stars

Most trusted provider

eDreams
3 stars

Round-trip from

$381
(CrystalTravel)

One-way from

$323
(Kiwi.com)

Popular in

June

Cheapest in

October

Average price

$790
Provider with most accurate pricing for Seattle/Tacoma Intl-Brussels Bruxelles-National flight deals.
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Provider most trusted by Cheapflights users for Seattle/Tacoma Intl-Brussels Bruxelles-National flights.
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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. 13% potential increase in price ($97 potential increase over avg. RT price).
Search Deals
Cheapest flight prices on average. 3% potential price decrease ($19 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 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 December 12, 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

Wed 2/11

7:00 am-8:55 am

1 stop16h 55m

Brussels Bruxelles-National

Thu 2/19

11:55 am-8:56 pm

1 stop18h 01m

$469

SeattleBrussels

SEA - BRU

SEABRU

Seattle/Tacoma Intl

Wed 1/28

8:40 am-1:15 pm

3 stops19h 35m

Brussels Bruxelles-National

Sun 2/1

10:00 am-10:43 pm

2 stops45h 43m

$484

SeattleBrussels

SEA - BRU

SEABRU

Seattle/Tacoma Intl

Sun 1/18

9:25 am-1:15 pm

2 stops18h 50m

Brussels Bruxelles-National

Thu 1/29

10:00 am-8:57 pm

2 stops43h 57m

$484

SeattleBrussels

SEA - BRU

SEABRU

Seattle/Tacoma Intl

Thu 1/15

10:58 am-1:15 pm

2 stops17h 17m

Brussels Bruxelles-National

Thu 1/29

11:55 am-10:43 pm

2 stops19h 48m

$495

SeattleBrussels

SEA - BRU

SEABRU

Seattle/Tacoma Intl

Fri 1/23

10:58 am-1:15 pm

2 stops17h 17m

Brussels Bruxelles-National

Fri 1/30

10:00 am-10:43 pm

3 stops21h 43m

$507

SeattleBrussels

SEA - BRU

SEABRU

Seattle/Tacoma Intl

Sat 1/24

7:00 am-1:15 pm

2 stops21h 15m

Brussels Bruxelles-National

Sat 1/31

9:40 am-7:16 pm

2 stops18h 36m

$512

SeattleBrussels

SEA - BRU

SEABRU

Seattle/Tacoma Intl

Sat 2/14

7:00 am-8:55 am

1 stop16h 55m

Brussels Bruxelles-National

Fri 2/20

4:55 pm-10:16 pm

2 stops38h 21m

$522

SeattleBrussels

SEA - BRU

SEABRU

Seattle/Tacoma Intl

Tue 4/7

7:00 pm-12:55 pm

1 stop32h 55m

Brussels Bruxelles-National

Thu 4/16

1:50 pm-8:40 pm

1 stop15h 50m

$530

SeattleBrussels

SEA - BRU

SEABRU

Seattle/Tacoma Intl

Sun 4/26

3:40 pm-12:55 pm

1 stop12h 15m

Brussels Bruxelles-National

Wed 5/6

1:50 pm-8:40 pm

1 stop15h 50m

$535

SeattleBrussels

SEA - BRU

SEABRU

Seattle/Tacoma Intl

Thu 1/8

7:00 am-8:05 am

1 stop16h 05m

Brussels Bruxelles-National

Thu 1/15

7:00 am-12:10 pm

1 stop14h 10m

$554

Flights are sorted by cheapest round-trip flights first.

Deals found on 12/10

Showing 1-10 of 19 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 December.
ProviderPrice AccuracyTrust Score*
FlightHubPrice Accuracy3 starsTrust Score*1 star
eDreamsPrice Accuracy3 starsTrust Score*3 stars
AranGrantPrice Accuracy2 starsTrust Score*3 stars
oojoPrice Accuracy3 starsTrust Score*3 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 eDreams to be most consistent on Cheapflights vs. eDreams Users can find the same prices on Seattle-Brussels Bruxelles-National Airport flight deals on Cheapflights vs. eDreams >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 eDreams the most. eDreams 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 December 5, 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, January is the cheapest month in which you can book a flight from Seattle to Brussels Bruxelles-National Airport (average of $380). Flying from Seattle to Brussels Bruxelles-National Airport in July is currently the most expensive (average of $507). 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 December 12, 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 9% 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 December 12, 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
7.7
Good
1,432 reviews

Food

7.2

Comfort

7.6

Crew

8.3

Entertainment

7.1

Overall

7.7

Boarding

7.8

Reviews

1 / 20
8.0
Excellent

Anonymous,Dec 2025

YYC - AMS

Not literally sitting in the very last row in the middle
KLM
7.7
Good
1,432 reviews
KLM
7.7
Good
1,432 reviews

Food

7.2

Comfort

7.6

Crew

8.3

Entertainment

7.1

Overall

7.7

Boarding

7.8

Reviews

1 / 20
8.0
Excellent

Anonymous,Dec 2025

YYC - AMS

Not literally sitting in the very last row in the middle
United Airlines
7.4
Good
9,094 reviews
KLM
7.7
Good
1,432 reviews

Food

7.2

Comfort

7.6

Crew

8.3

Entertainment

7.1

Overall

7.7

Boarding

7.8

Reviews

1 / 20
8.0
Excellent

Anonymous,Dec 2025

YYC - AMS

Not literally sitting in the very last row in the middle
Icelandair
7.0
Good
589 reviews
KLM
7.7
Good
1,432 reviews

Food

7.2

Comfort

7.6

Crew

8.3

Entertainment

7.1

Overall

7.7

Boarding

7.8

Reviews

1 / 20
8.0
Excellent

Anonymous,Dec 2025

YYC - AMS

Not literally sitting in the very last row in the middle
Lufthansa
6.8
Okay
7,626 reviews
KLM
7.7
Good
1,432 reviews

Food

7.2

Comfort

7.6

Crew

8.3

Entertainment

7.1

Overall

7.7

Boarding

7.8

Reviews

1 / 20
8.0
Excellent

Anonymous,Dec 2025

YYC - AMS

Not literally sitting in the very last row in the middle
British Airways
6.7
Okay
7,571 reviews
KLM
7.7
Good
1,432 reviews

Food

7.2

Comfort

7.6

Crew

8.3

Entertainment

7.1

Overall

7.7

Boarding

7.8

Reviews

1 / 20
8.0
Excellent

Anonymous,Dec 2025

YYC - AMS

Not literally sitting in the very last row in the middle

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 16h 55m. 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 $387. Other airlines that can offer you cheap pricing are Delta, from $482, and United Airlines, from $483. These flights start at 38% 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 $348 while deals on Delta start at $428 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 $380). Flying from Seattle to Brussels Bruxelles-National Airport in July is currently the most expensive (average of $507). 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

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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 December 12, 2025.
AirlineCheapestAverageFlexibilityOn-time
IcelandairCheapest$387Average$492FlexibilityNo cancel feeOn-time76%
DeltaCheapest$482Average$714FlexibilityNo cancel feeOn-timeN/A
United AirlinesCheapest$483Average$734FlexibilityNo cancel feeOn-time69%
Virgin AtlanticCheapest$488Average$491FlexibilityNo cancel feeOn-time72%
LufthansaCheapest$501Average$705FlexibilityNo cancel feeOn-time76%
Air FranceCheapest$506Average$581FlexibilityNo cancel feeOn-time77%
KLMCheapest$511Average$663FlexibilityNo cancel feeOn-time75%
Air CanadaCheapest$518Average$740FlexibilityNo cancel feeOn-time67%
British AirwaysCheapest$519Average$759FlexibilityNo cancel feeOn-time70%
Aer LingusCheapest$532Average$556FlexibilityNo cancel feeOn-timeN/A

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