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$374+ 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 5/9. Fares are subject to change and may not be available on all flights or dates of travel.
SEA — BRU
Feb 25 — Mar 41
Tue 2/25
Tue 3/4
1 adult, Economy
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The best prices from Seattle/Tacoma Intl to Brussels are usually found in February or January, 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 February 20, 2025.

Round-trip from

$444
(oojo)

One-way from

$374
(Kiwi.com)

Popular in

June

Cheapest in

February

Average price

$527
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. 21% potential increase in price ($183 potential increase over avg. RT price).
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Cheapest flight prices on average. 4% potential price decrease ($27 potential savings vs. average RT price).
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Average for round-trip flights in February 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 February 20, 2025.

This oojo deal was found by Cheapflights users on 2/20. 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.
Sat 9/1311:30 pmSEA - BRU
1 stop28h 20mIcelandair
Thu 10/21:50 pmBRU - SEA
1 stop15h 50mIcelandair
Deal found 2/20$461
This Kiwi.com deal was found by Cheapflights users on 2/19. 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 Kiwi.com is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Wed 4/26:45 pmSEA - BRU
1 stop16h 55mAer Lingus
Wed 4/910:20 amBRU - SEA
1 stop15h 39mAer Lingus
Deal found 2/19$480
This Flightnetwork deal was found by Cheapflights users on 2/20. 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 Flightnetwork is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Mon 10/612:20 pmSEA - BRU
2 stops34h 45mAir Canada
Fri 11/710:00 amBRU - SEA
2 stops32h 50mAir Canada
Deal found 2/20$497
This StudentUniverse deal was found by Cheapflights users on 2/20. 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 StudentUniverse is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Tue 3/251:56 pmSEA - BRU
2 stops20h 29mFinnair
Thu 4/311:40 amBRU - SEA
2 stops20h 27mFinnair
Deal found 2/20$515
This Booking.com deal was found by Cheapflights users on 2/20. 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 Booking.com is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Wed 4/21:25 pmSEA - BRU
2 stops16h 55mBritish Airways
Wed 4/910:55 amBRU - SEA
1 stop16h 25mBritish Airways
Deal found 2/20$520
This Mytrip deal was found by Cheapflights users on 2/20. 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 Mytrip is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Tue 3/255:55 amSEA - BRU
2 stops42h 00mMultiple Airlines
Thu 4/37:00 amBRU - SEA
1 stop14h 25mMultiple Airlines
Deal found 2/20$523
This Flighttix deal was found by Cheapflights users on 2/20. 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.
Wed 4/210:50 amSEA - BRU
1 stop13h 10mBrussels Airlines
Wed 4/99:40 amBRU - SEA
1 stop20h 46mBrussels Airlines
Deal found 2/20$528
This Kiwi.com deal was found by Cheapflights users on 2/20. 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 Kiwi.com is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Wed 4/26:50 pmSEA - BRU
1 stop16h 00mLufthansa
Wed 4/96:45 amBRU - SEA
1 stop19h 14mLufthansa
Deal found 2/20$531
This United Airlines deal was found by Cheapflights users on 2/20. 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.
Wed 4/210:50 amSEA - BRU
1 stop13h 10mUnited Airlines
Wed 4/99:40 amBRU - SEA
1 stop20h 46mUnited Airlines
Deal found 2/20$533
This Delta deal was found by Cheapflights users on 2/20. 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.
Sat 3/810:55 pmSEA - BRU
2 stops25h 05mDelta
Tue 3/1811:00 amBRU - SEA
1 stop19h 25mDelta
Deal found 2/20$546
This KLM deal was found by Cheapflights users on 2/20. 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 KLM is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Wed 3/52:10 pmSEA - BRU
1 stop15h 05mKLM
Mon 3/172:45 pmBRU - SEA
1 stop29h 55mKLM
Deal found 2/20$557
This oojo deal was found by Cheapflights users on 2/20. 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.
Sun 3/2311:48 pmSEA - BRU
2 stops33h 12mTAP AIR PORTUGAL
Sun 4/68:55 pmBRU - SEA
2 stops57h 35mTAP AIR PORTUGAL
Deal found 2/20$625

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 February 20, 2025.

Fly from

Seattle

Fly to

Brussels

Route

Depart

Return

Price

SeattleBrussels

SEA - BRU

SEABRU

Seattle/Tacoma Intl

Tue 5/6

3:45 pm-12:50 pm

1 stop12h 05m

Brussels Bruxelles-National

Mon 5/19

1:50 pm-8:40 pm

1 stop15h 50m

$466

SeattleBrussels

SEA - BRU

SEABRU

Seattle/Tacoma Intl

Wed 4/2

6:45 pm-8:40 pm

1 stop16h 55m

Brussels Bruxelles-National

Wed 4/9

10:20 am-4:59 pm

1 stop15h 39m

$480

SeattleBrussels

SEA - BRU

SEABRU

Seattle/Tacoma Intl

Wed 4/2

5:45 am-8:05 am

2 stops17h 20m

Brussels Bruxelles-National

Wed 4/9

9:40 am-9:26 pm

1 stop20h 46m

$499

SeattleBrussels

SEA - BRU

SEABRU

Seattle/Tacoma Intl

Tue 3/25

1:56 pm-6:25 pm

2 stops20h 29m

Brussels Bruxelles-National

Thu 4/3

11:40 am-11:07 pm

2 stops20h 27m

$515

SeattleBrussels

SEA - BRU

SEABRU

Seattle/Tacoma Intl

Wed 4/2

1:25 pm-3:20 pm

2 stops16h 55m

Brussels Bruxelles-National

Wed 4/9

10:55 am-6:20 pm

1 stop16h 25m

$520

SeattleBrussels

SEA - BRU

SEABRU

Seattle/Tacoma Intl

Tue 3/25

5:55 am-7:55 am

2 stops42h 00m

Brussels Bruxelles-National

Thu 4/3

7:00 am-12:25 pm

1 stop14h 25m

$523

SeattleBrussels

SEA - BRU

SEABRU

Seattle/Tacoma Intl

Wed 4/2

10:50 am-9:00 am

1 stop13h 10m

Brussels Bruxelles-National

Wed 4/9

9:40 am-9:26 pm

1 stop20h 46m

$528

SeattleBrussels

SEA - BRU

SEABRU

Seattle/Tacoma Intl

Wed 4/2

6:50 pm-7:50 pm

1 stop16h 00m

Brussels Bruxelles-National

Wed 4/9

6:45 am-4:59 pm

1 stop19h 14m

$531

SeattleBrussels

SEA - BRU

SEABRU

Seattle/Tacoma Intl

Wed 4/2

10:50 am-9:00 am

1 stop13h 10m

Brussels Bruxelles-National

Wed 4/9

9:40 am-9:26 pm

1 stop20h 46m

$533

SeattleBrussels

SEA - BRU

SEABRU

Seattle/Tacoma Intl

Sat 3/8

11:05 pm-9:00 am

2 stops24h 55m

Brussels Bruxelles-National

Tue 3/18

11:00 am-10:42 am

2 stops31h 42m

$546

Flights are sorted by cheapest round-trip flights first.

Deals found on 2/20

Showing 1-10 of 22 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 February 14, 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 February 20, 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 February 20, 2025.
Read reviews from past customers who have flown Delta, KLM and Finnair 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
8,220 reviews

Entertainment

7.9

Boarding

8.2

Food

7.3

Comfort

8.0

Overall

8.0

Crew

8.5

Reviews

1 / 20

10.0
Excellent

Aaron,Oct 2024

LAX - LHR

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

Delta
8.0
Very good
8,220 reviews
Delta
8.0
Very good
8,220 reviews

Entertainment

7.9

Boarding

8.2

Food

7.3

Comfort

8.0

Overall

8.0

Crew

8.5

Reviews

1 / 20

10.0
Excellent

Aaron,Oct 2024

LAX - LHR

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

KLM
7.8
Good
1,333 reviews
Delta
8.0
Very good
8,220 reviews

Entertainment

7.9

Boarding

8.2

Food

7.3

Comfort

8.0

Overall

8.0

Crew

8.5

Reviews

1 / 20

10.0
Excellent

Aaron,Oct 2024

LAX - LHR

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

Finnair
7.6
Good
1,273 reviews
Delta
8.0
Very good
8,220 reviews

Entertainment

7.9

Boarding

8.2

Food

7.3

Comfort

8.0

Overall

8.0

Crew

8.5

Reviews

1 / 20

10.0
Excellent

Aaron,Oct 2024

LAX - LHR

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

SWISS
7.5
Good
1,568 reviews
Delta
8.0
Very good
8,220 reviews

Entertainment

7.9

Boarding

8.2

Food

7.3

Comfort

8.0

Overall

8.0

Crew

8.5

Reviews

1 / 20

10.0
Excellent

Aaron,Oct 2024

LAX - LHR

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

Virgin Atlantic
7.5
Good
654 reviews
Delta
8.0
Very good
8,220 reviews

Entertainment

7.9

Boarding

8.2

Food

7.3

Comfort

8.0

Overall

8.0

Crew

8.5

Reviews

1 / 20

10.0
Excellent

Aaron,Oct 2024

LAX - LHR

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 $444, was found to be the cheapest airline from Seattle to Brussels.Alternate airlines to your destination round-trip include Aer Lingus and Air Canada. Users have found that Icelandair is 34% 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 TAP AIR PORTUGAL, with whom users have recently found tickets for as low as $406. However, be on the lookout for offers from Virgin Atlantic and Air Canada, 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, 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 Charleroi Brussels flights
Portland to Antwerp 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 February 20, 2025.
AirlineCheapestAverageFlexibilityOn-time
IcelandairCheapest$402Average$568FlexibilityNo cancel feeOn-time76%
British AirwaysCheapest$501Average$690FlexibilityNo cancel feeOn-time70%
American AirlinesCheapest$501Average$637FlexibilityNo cancel feeOn-time71%
Air CanadaCheapest$526Average$698FlexibilityNo cancel feeOn-time67%
United AirlinesCheapest$529Average$634FlexibilityNo cancel feeOn-time69%
Aer LingusCheapest$532Average$676FlexibilityNo cancel feeOn-timeN/A
KLMCheapest$535Average$718FlexibilityNo cancel feeOn-time75%
DeltaCheapest$561Average$864FlexibilityNo cancel feeOn-timeN/A
Air FranceCheapest$565Average$851FlexibilityNo cancel feeOn-time77%
LufthansaCheapest$580Average$741FlexibilityNo cancel feeOn-time76%
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