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$383+ 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 1/29. Fares are subject to change and may not be available on all flights or dates of travel.
SEA — BRU
Jan 26 — Feb 21
Sun 1/26
Sun 2/2
1 adult, Economy
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The best prices from Seattle/Tacoma Intl to Brussels are usually found in January or November, booked 25 days in advance, depart on a Tuesday or Monday and return on a Sunday

Cheap 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 21, 2025.

Round-trip from

$430
(Gotogate)

Popular in

June

Cheapest in

January

Average price

$547
From Seattle/Tacoma Intl to Brussels
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High demand for flights, 21% potential price rise
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Best time to find cheap flights, 4% potential price drop
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Average for round-trip flights in January 2025
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Find 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 21, 2025.

This Gotogate 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 Gotogate is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Thu 1/232:35 pmSEA - BRU
1 stop12h 20mIcelandair
Thu 2/612:50 pmBRU - SEA
1 stop13h 10mIcelandair
Deal found 1/20$430
This Ticket 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 Ticket is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Wed 3/197:15 amSEA - BRU
1 stop17h 45mKLM
Wed 3/266:15 amBRU - SEA
1 stop14h 25mKLM
Deal found 1/20$476
This Gotogate 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 Gotogate is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Tue 3/43:05 pmSEA - BRU
2 stops31h 50mAir Canada
Tue 3/1110:00 amBRU - SEA
2 stops44h 00mAir Canada
Deal found 1/20$479
This Flighttix 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 Flighttix is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Tue 3/45:45 amSEA - BRU
2 stops17h 10mMultiple Airlines
Tue 3/1111:55 amBRU - SEA
1 stop16h 29mMultiple Airlines
Deal found 1/20$493
This American 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 American Airlines is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Tue 3/41:35 pmSEA - BRU
1 stop12h 15mAmerican Airlines
Tue 3/1110:15 amBRU - SEA
2 stops19h 50mAmerican Airlines
Deal found 1/20$519
This Delta 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 Delta is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Wed 3/197:15 amSEA - BRU
1 stop17h 45mDelta
Wed 3/266:15 amBRU - SEA
1 stop14h 25mDelta
Deal found 1/20$522
This Expedia 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 Expedia is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Mon 2/36:50 pmSEA - BRU
1 stop12h 50mBritish Airways
Mon 2/105:35 pmBRU - SEA
1 stop26h 45mBritish Airways
Deal found 1/20$523
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 2/111:11 pmSEA - BRU
2 stops25h 04mUnited Airlines
Fri 2/1410:10 amBRU - SEA
1 stop34h 34mUnited Airlines
Deal found 1/20$533
This Finnair 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 Finnair is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Wed 4/21:25 pmSEA - BRU
2 stops19h 55mFinnair
Tue 4/1511:40 amBRU - SEA
2 stops20h 09mFinnair
Deal found 1/21$554
This Justfly.com 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 Justfly.com is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Mon 5/512:20 pmSEA - BRU
1 stop34h 30mBrussels Airlines
Fri 5/309:40 amBRU - SEA
1 stop34h 36mBrussels Airlines
Deal found 1/20$569
This KAYAK 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 KAYAK is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Sat 9/1310:00 amSEA - BRU
2 stops37h 05mLufthansa
Thu 10/210:00 amBRU - SEA
2 stops36h 05mLufthansa
Deal found 1/20$601
This SWISS 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 SWISS is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Tue 9/161:45 pmSEA - BRU
2 stops15h 30mSWISS
Mon 9/298:05 pmBRU - SEA
2 stops31h 31mSWISS
Deal found 1/20$631

Find flights from Seattle to Brussels within your budget

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 21, 2025.

Fly from

Any airport

Fly to

Any airport

Route

Depart

Return

Price

SeattleBrussels

SEA - BRU

SEABRU

Seattle/Tacoma Intl

Wed 3/19

7:15 am-9:00 am

1 stop17h 45m

Brussels Bruxelles-National

Wed 3/26

6:15 am-12:40 pm

1 stop14h 25m

$476

SeattleBrussels

SEA - BRU

SEABRU

Seattle/Tacoma Intl

Tue 3/4

3:05 pm-7:55 am

2 stops31h 50m

Brussels Bruxelles-National

Tue 3/11

10:00 am-10:00 pm

2 stops44h 00m

$479

SeattleBrussels

SEA - BRU

SEABRU

Seattle/Tacoma Intl

Tue 3/4

5:45 am-7:55 am

2 stops17h 10m

Brussels Bruxelles-National

Tue 3/11

11:55 am-8:24 pm

1 stop16h 29m

$493

SeattleBrussels

SEA - BRU

SEABRU

Seattle/Tacoma Intl

Tue 3/4

1:35 pm-10:50 am

1 stop12h 15m

Brussels Bruxelles-National

Tue 3/11

10:15 am-10:05 pm

2 stops19h 50m

$519

SeattleBrussels

SEA - BRU

SEABRU

Seattle/Tacoma Intl

Wed 3/19

7:15 am-9:00 am

1 stop17h 45m

Brussels Bruxelles-National

Wed 3/26

6:15 am-12:40 pm

1 stop14h 25m

$522

SeattleBrussels

SEA - BRU

SEABRU

Seattle/Tacoma Intl

Mon 2/3

6:50 pm-4:40 pm

1 stop12h 50m

Brussels Bruxelles-National

Mon 2/10

5:35 pm-11:20 am

1 stop26h 45m

$523

SeattleBrussels

SEA - BRU

SEABRU

Seattle/Tacoma Intl

Sat 2/1

11:11 pm-9:15 am

2 stops25h 04m

Brussels Bruxelles-National

Fri 2/14

10:10 am-11:44 am

1 stop34h 34m

$533

SeattleBrussels

SEA - BRU

SEABRU

Seattle/Tacoma Intl

Wed 5/21

3:45 pm-12:50 pm

1 stop12h 05m

Brussels Bruxelles-National

Tue 6/3

1:50 pm-5:50 pm

1 stop13h 00m

$543

SeattleBrussels

SEA - BRU

SEABRU

Seattle/Tacoma Intl

Wed 4/2

1:25 pm-6:20 pm

2 stops19h 55m

Brussels Bruxelles-National

Tue 4/15

11:40 am-10:49 pm

2 stops20h 09m

$554

SeattleBrussels

SEA - BRU

SEABRU

Seattle/Tacoma Intl

Mon 5/5

12:20 pm-7:50 am

1 stop34h 30m

Brussels Bruxelles-National

Fri 5/30

9:40 am-11:16 am

1 stop34h 36m

$569

Flights are sorted by cheapest round-trip flights first.

Deals found on 1/21

Showing 1-10 of 25 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.

Travel insights for flights from Seattle to Brussels

Get recent, data-driven insights about flights from Seattle to Brussels including ideal travel times, pricing trends, and more.

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 17, 2025.

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 25 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, November is the cheapest month in which you can book a flight from Seattle to Brussels (average of $614). Flying from Seattle to Brussels in June is currently the most expensive (average of $1,146). 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 Brussels. Discover flight options and departure times throughout the day, allowing you to choose a departure time that suits your schedule. Data last updated January 21, 2025.

It’s optimal to fly from Seattle to Brussels 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?

Use this chart to determine the cheapest time to fly round-trip from Seattle to Brussels. Price data was last updated on May 12, 2024.

Travelers seeking maximum savings on their Seattle to Brussels 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.

Rainfall in Brussels by month

Plan your trip to Brussels by taking into account the average rainfall totals by month.

In terms of precipitation, rainfall in Brussels ranges from 1.6 - 3.1 inches per month. January is typically the wettest month, when rainfall can reach 3.1 in. August is typically the driest time to visit Brussels when rainfall is around 1.6 in.

Temperature in Brussels by month

Plan your trip to Brussels by taking into account the average temperature totals by month.

If weather is an important factor for your trip to Brussels, use this chart to help with planning. For those seeking warmer temperatures, July is the ideal time of year to visit, when temperatures reach an average of 62.6 F. Travelers looking to avoid the cold should look outside of January, when temperatures are typically at their lowest (around 37.4 F).

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 21, 2025.
Read reviews from past customers who have flown KLM, United Airlines and Air Canada from Seattle to Brussels. You can also see how each airline stacks up in terms of entertainment options, comfort, food, crew/service, and boarding process.
Delta
8.0
Very good
8,521 reviews

Comfort

8.0

Crew

8.6

Boarding

8.2

Entertainment

7.9

Food

7.3

Overall

8.0

Reviews

1 / 10

This was a flight operated by Virgin Atlantic in their Upper Class cabin. Overall, an outstanding experience.

Delta
8.0
Very good
8,521 reviews
Delta
8.0
Very good
8,521 reviews

Comfort

8.0

Crew

8.6

Boarding

8.2

Entertainment

7.9

Food

7.3

Overall

8.0

Reviews

1 / 10

This was a flight operated by Virgin Atlantic in their Upper Class cabin. Overall, an outstanding experience.

KLM
7.8
Good
1,341 reviews
Delta
8.0
Very good
8,521 reviews

Comfort

8.0

Crew

8.6

Boarding

8.2

Entertainment

7.9

Food

7.3

Overall

8.0

Reviews

1 / 10

This was a flight operated by Virgin Atlantic in their Upper Class cabin. Overall, an outstanding experience.

Austrian Airlines
7.6
Good
786 reviews
Delta
8.0
Very good
8,521 reviews

Comfort

8.0

Crew

8.6

Boarding

8.2

Entertainment

7.9

Food

7.3

Overall

8.0

Reviews

1 / 10

This was a flight operated by Virgin Atlantic in their Upper Class cabin. Overall, an outstanding experience.

United Airlines
7.4
Good
8,984 reviews
Delta
8.0
Very good
8,521 reviews

Comfort

8.0

Crew

8.6

Boarding

8.2

Entertainment

7.9

Food

7.3

Overall

8.0

Reviews

1 / 10

This was a flight operated by Virgin Atlantic in their Upper Class cabin. Overall, an outstanding experience.

Turkish Airlines
7.3
Good
3,931 reviews
Delta
8.0
Very good
8,521 reviews

Comfort

8.0

Crew

8.6

Boarding

8.2

Entertainment

7.9

Food

7.3

Overall

8.0

Reviews

1 / 10

This was a flight operated by Virgin Atlantic in their Upper Class cabin. Overall, an outstanding experience.

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 10 airlines. Seattle/Tacoma Intl is conveniently located just 11.4 mi from Seattle’s city center.

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

    Icelandair, at $430, was found to be the cheapest airline from Seattle to Brussels.Alternate airlines to your destination round-trip include KLM and Air Canada. 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, November is the cheapest month in which you can book a flight from Seattle to Brussels (average of $614). Flying from Seattle to Brussels in June is currently the most expensive (average of $1,146). 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

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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 Antwerp flights
Portland to Charleroi Brussels flights

Top 10 airlines flying from Seattle to Brussels

Discover the top 10 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 21, 2025.
AirlineCheapestAverageFlexibilityOn-time
IcelandairCheapest$402Average$566FlexibilityNo cancel feeOn-time76%
Air CanadaCheapest$459Average$698FlexibilityNo cancel feeOn-time67%
British AirwaysCheapest$501Average$694FlexibilityNo cancel feeOn-time70%
American AirlinesCheapest$501Average$637FlexibilityNo cancel feeOn-time71%
United AirlinesCheapest$529Average$623FlexibilityNo cancel feeOn-time69%
Aer LingusCheapest$532Average$714FlexibilityNo cancel feeOn-timeN/A
KLMCheapest$535Average$722FlexibilityNo cancel feeOn-time75%
DeltaCheapest$561Average$881FlexibilityNo cancel feeOn-timeN/A
Air FranceCheapest$565Average$851FlexibilityNo cancel feeOn-time77%
LufthansaCheapest$580Average$775FlexibilityNo cancel feeOn-time76%
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