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$189+ 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 6/13. Fares are subject to change and may not be available on all flights or dates of travel.
SEA — BRU
May 5 — May 121
Mon 5/5
Mon 5/12
1 adult, Economy
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Cheapflights Tip: The best prices from Seattle/Tacoma Intl to Brussels are usually found in February or November, booked 69 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 April 30, 2025.

Round-trip from

$550
(Mytrip)

One-way from

$189
(Vakatrip)

Popular in

June

Cheapest in

February

Average price

$634
From Seattle/Tacoma Intl to Brussels
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One-way flight from Seattle/Tacoma Intl to Brussels
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Highest demand for flights based on searches. 17% potential increase in price ($136 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 April 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 April 30, 2025.

This oojo deal was found by Cheapflights users on 4/29. 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 9/113:45 pmSEA - BRU
1 stop12h 05mIcelandair
Thu 9/181:50 pmBRU - SEA
1 stop15h 50mIcelandair
Deal found 4/29$475
This Cheapflightsfares deal was found by Cheapflights users on 4/29. 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.
Sun 8/314:00 pmSEA - BRU
2 stops19h 35mScandinavian Airlines
Sun 9/79:20 pmBRU - SEA
2 stops25h 30mScandinavian Airlines
Deal found 4/29$480
This Mytrip deal was found by Cheapflights users on 4/28. 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 9/312:10 pmSEA - BRU
2 stops16h 05mMultiple Airlines
Tue 9/309:40 amBRU - SEA
2 stops21h 36mMultiple Airlines
Deal found 4/28$547
This United Airlines deal was found by Cheapflights users on 4/28. 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.
Tue 12/233:10 pmSEA - BRU
1 stop12h 50mUnited Airlines
Fri 1/911:55 amBRU - SEA
1 stop17h 15mUnited Airlines
Deal found 4/28$562
This FlightHub deal was found by Cheapflights users on 4/28. 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.
Mon 9/12:55 pmSEA - BRU
2 stops32h 10mLufthansa
Wed 9/1010:00 amBRU - SEA
2 stops17h 36mLufthansa
Deal found 4/28$564
This American Airlines deal was found by Cheapflights users on 4/28. 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.
Mon 9/2210:46 amSEA - BRU
2 stops18h 34mAmerican Airlines
Mon 9/293:00 pmBRU - SEA
1 stop29h 10mAmerican Airlines
Deal found 4/28$584
This Travelocity deal was found by Cheapflights users on 4/28. 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 Travelocity is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Tue 12/237:30 amSEA - BRU
2 stops17h 40mAir Canada
Fri 1/99:45 amBRU - SEA
2 stops21h 11mAir Canada
Deal found 4/28$588
This oojo deal was found by Cheapflights users on 4/28. 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.
Mon 9/2210:46 amSEA - BRU
2 stops18h 34mBritish Airways
Mon 9/299:15 pmBRU - SEA
2 stops28h 42mBritish Airways
Deal found 4/28$594
This Delta deal was found by Cheapflights users on 4/28. 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.
Tue 9/3012:40 amSEA - BRU
2 stops21h 50mDelta
Wed 10/2210:45 amBRU - SEA
1 stop20h 40mDelta
Deal found 4/28$596
This Virgin Atlantic deal was found by Cheapflights users on 4/29. 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 Virgin Atlantic is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Tue 4/2910:59 pmSEA - BRU
1 stop24h 41mVirgin Atlantic
Thu 5/2910:45 amBRU - SEA
2 stops22h 02mVirgin Atlantic
Deal found 4/29$663
This KLM deal was found by Cheapflights users on 4/28. 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.
Mon 5/56:07 pmSEA - BRU
1 stop11h 28mKLM
Fri 5/3010:25 amBRU - SEA
1 stop14h 32mKLM
Deal found 4/28$695
This SWISS deal was found by Cheapflights users on 4/29. 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.
Mon 6/94:25 pmSEA - BRU
1 stop31h 25mSWISS
Mon 6/166:00 pmBRU - SEA
2 stops33h 33mSWISS
Deal found 4/29$851

Cheapflights Fare Finder

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 April 30, 2025.
Use the filters below to find and compare flights from Seattle to Brussels that are best for you.

Fly from

Seattle

Fly to

Brussels

Route

Depart

Return

Price

SeattleBrussels

SEA - BRU

SEABRU

Seattle/Tacoma Intl

Thu 9/11

3:45 pm-12:50 pm

1 stop12h 05m

Brussels Bruxelles-National

Thu 9/18

1:50 pm-8:40 pm

1 stop15h 50m

$475

SeattleBrussels

SEA - BRU

SEABRU

Seattle/Tacoma Intl

Sun 8/31

4:00 pm-8:35 pm

2 stops19h 35m

Brussels Bruxelles-National

Sun 9/7

9:20 pm-1:50 pm

2 stops25h 30m

$480

SeattleBrussels

SEA - BRU

SEABRU

Seattle/Tacoma Intl

Wed 9/3

12:10 pm-1:15 pm

2 stops16h 05m

Brussels Bruxelles-National

Tue 9/30

9:40 am-10:16 pm

2 stops21h 36m

$547

SeattleBrussels

SEA - BRU

SEABRU

Seattle/Tacoma Intl

Mon 9/1

2:55 pm-8:05 am

2 stops32h 10m

Brussels Bruxelles-National

Wed 9/10

10:00 am-6:36 pm

2 stops17h 36m

$564

SeattleBrussels

SEA - BRU

SEABRU

Seattle/Tacoma Intl

Mon 9/22

10:46 am-2:20 pm

2 stops18h 34m

Brussels Bruxelles-National

Mon 9/29

3:00 pm-11:10 am

1 stop29h 10m

$584

SeattleBrussels

SEA - BRU

SEABRU

Seattle/Tacoma Intl

Wed 10/1

7:20 am-9:45 am

2 stops41h 25m

Brussels Bruxelles-National

Wed 10/15

10:00 am-3:31 pm

2 stops38h 31m

$591

SeattleBrussels

SEA - BRU

SEABRU

Seattle/Tacoma Intl

Mon 9/22

10:46 am-2:20 pm

2 stops18h 34m

Brussels Bruxelles-National

Mon 9/29

9:15 pm-4:57 pm

2 stops28h 42m

$594

SeattleBrussels

SEA - BRU

SEABRU

Seattle/Tacoma Intl

Tue 9/30

12:40 am-7:30 am

2 stops21h 50m

Brussels Bruxelles-National

Wed 10/22

10:45 am-10:25 pm

1 stop20h 40m

$596

SeattleBrussels

SEA - BRU

SEABRU

Seattle/Tacoma Intl

Fri 8/22

7:20 am-8:00 am

1 stop15h 40m

Brussels Bruxelles-National

Tue 9/9

10:00 am-7:31 pm

1 stop18h 31m

$615

SeattleBrussels

SEA - BRU

SEABRU

Seattle/Tacoma Intl

Mon 5/26

7:16 am-8:40 am

1 stop16h 24m

Brussels Bruxelles-National

Mon 6/2

10:45 am-10:43 pm

1 stop20h 58m

$708

Flights are sorted by cheapest round-trip flights first.

Deals found on 4/29

Showing 1-10 of 21 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.

Cheapflights Insights

Everything you need to know about your flight from Seattle to Brussels

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 April 25, 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 69 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 $1,127). 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 April 30, 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 April 30, 2025.
Delta
8.0
Very good
7,936 reviews

Entertainment

7.9

Boarding

8.2

Comfort

7.9

Food

7.3

Crew

8.5

Overall

8.0

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
7,936 reviews
Delta
8.0
Very good
7,936 reviews

Entertainment

7.9

Boarding

8.2

Comfort

7.9

Food

7.3

Crew

8.5

Overall

8.0

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
7,936 reviews

Entertainment

7.9

Boarding

8.2

Comfort

7.9

Food

7.3

Crew

8.5

Overall

8.0

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
1,588 reviews
Delta
8.0
Very good
7,936 reviews

Entertainment

7.9

Boarding

8.2

Comfort

7.9

Food

7.3

Crew

8.5

Overall

8.0

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.
United Airlines
7.4
Good
8,696 reviews
Delta
8.0
Very good
7,936 reviews

Entertainment

7.9

Boarding

8.2

Comfort

7.9

Food

7.3

Crew

8.5

Overall

8.0

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
7.4
Good
642 reviews
Delta
8.0
Very good
7,936 reviews

Entertainment

7.9

Boarding

8.2

Comfort

7.9

Food

7.3

Crew

8.5

Overall

8.0

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 11 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 $550, was found to be the cheapest airline from Seattle to Brussels.Alternate airlines to your destination round-trip include Delta and British Airways. Users have found that Icelandair is 14% 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 Icelandair, with whom users have recently found tickets for as low as $189. However, be on the lookout for offers from Aer Lingus 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 $1,127). 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

Browse thousands of different options on Cheapflights for your next trip

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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 April 30, 2025.
AirlineCheapestAverageFlexibilityOn-time
IcelandairCheapest$402Average$537FlexibilityNo cancel feeOn-time76%
British AirwaysCheapest$495Average$670FlexibilityNo cancel feeOn-time70%
American AirlinesCheapest$501Average$583FlexibilityNo cancel feeOn-time71%
United AirlinesCheapest$529Average$665FlexibilityNo cancel feeOn-time69%
Aer LingusCheapest$532Average$544FlexibilityNo cancel feeOn-timeN/A
KLMCheapest$532Average$679FlexibilityNo cancel feeOn-time75%
Air CanadaCheapest$543Average$724FlexibilityNo cancel feeOn-time67%
DeltaCheapest$549Average$772FlexibilityNo cancel feeOn-timeN/A
Air FranceCheapest$554Average$731FlexibilityNo cancel feeOn-time77%
FinnairCheapest$572Average$787FlexibilityNo cancel feeOn-time76%

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