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$214+ 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 8/1. Fares are subject to change and may not be available on all flights or dates of travel.
SEA — BRU
jun. 17 — jun. 241
mar. 6/17
mar. 6/24
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 87 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 junio 12, 2025.

Round-trip from

$398
(Cheapflightsfares)

One-way from

$214
(Mytrip)

Popular in

June

Cheapest in

February

Average price

$830
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. 15% potential increase in price ($118 potential increase over avg. RT price).
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Cheapest flight prices on average. 3% potential price decrease ($19 potential savings vs. average RT price).
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Average for round-trip flights in June 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 junio 12, 2025.

This Cheapflightsfares deal was found by Cheapflights users on 6/12. 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.
mié. 10/14:20 pmSEA - BRU
1 stop18h 30mScandinavian Airlines
vie. 10/1010:20 amBRU - SEA
1 stop12h 40mScandinavian Airlines
Deal found 6/12$398
This Brussels Airlines deal was found by Cheapflights users on 6/12. 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 Brussels Airlines is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
mié. 8/611:02 amSEA - BRU
1 stop12h 58mBrussels Airlines
mié. 8/2012:00 pmBRU - SEA
1 stop17h 42mBrussels Airlines
Deal found 6/12$435
This Kiwi.com deal was found by Cheapflights users on 6/11. 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 Kiwi.com is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
dom. 8/37:20 amSEA - BRU
1 stop15h 40mMultiple Airlines
mar. 8/1910:00 amBRU - SEA
2 stops21h 16mMultiple Airlines
Deal found 6/11$444
This Flightnetwork deal was found by Cheapflights users on 6/11. 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 Flightnetwork is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
dom. 8/37:20 amSEA - BRU
1 stop15h 40mAir Canada
mar. 8/1910:00 amBRU - SEA
1 stop19h 41mAir Canada
Deal found 6/11$463
This FlightHub deal was found by Cheapflights users on 6/12. 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.
jue. 10/23:45 pmSEA - BRU
1 stop12h 05mIcelandair
vie. 10/101:50 pmBRU - SEA
1 stop15h 50mIcelandair
Deal found 6/12$465
This United Airlines deal was found by Cheapflights users on 6/10. 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.
mié. 8/67:20 amSEA - BRU
1 stop15h 40mUnited Airlines
vie. 8/2210:00 amBRU - SEA
2 stops38h 52mUnited Airlines
Deal found 6/10$478
This Delta deal was found by Cheapflights users on 6/12. 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.
sáb. 8/29:45 pmSEA - BRU
1 stop25h 45mDelta
mar. 8/1910:45 amBRU - SEA
1 stop21h 30mDelta
Deal found 6/12$498
This Lufthansa deal was found by Cheapflights users on 6/12. 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 Lufthansa is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
dom. 8/32:55 pmSEA - BRU
2 stops32h 05mLufthansa
vie. 8/1510:00 amBRU - SEA
2 stops37h 16mLufthansa
Deal found 6/12$520
This SWISS deal was found by Cheapflights users on 6/12. 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.
mié. 8/62:50 pmSEA - BRU
2 stops34h 25mSWISS
sáb. 8/239:40 amBRU - SEA
2 stops22h 19mSWISS
Deal found 6/12$594
This British Airways deal was found by Cheapflights users on 6/10. 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 British Airways is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
vie. 8/221:30 pmSEA - BRU
1 stop22h 45mBritish Airways
lun. 9/17:05 pmBRU - SEA
1 stop25h 05mBritish Airways
Deal found 6/10$603
This Austrian Airlines deal was found by Cheapflights users on 6/12. 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 Austrian Airlines is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
mar. 9/307:00 amSEA - BRU
2 stops24h 45mAustrian Airlines
sáb. 10/116:50 amBRU - SEA
2 stops22h 54mAustrian Airlines
Deal found 6/12$675
This TAP AIR PORTUGAL deal was found by Cheapflights users on 6/12. 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 TAP AIR PORTUGAL is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
jue. 10/211:30 amSEA - BRU
2 stops18h 35mTAP AIR PORTUGAL
jue. 10/95:55 amBRU - SEA
2 stops37h 24mTAP AIR PORTUGAL
Deal found 6/12$696

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 junio 12, 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

mié. 10/1

4:20 pm-7:50 pm

1 stop18h 30m

Brussels Bruxelles-National

vie. 10/10

10:20 am-2:00 pm

1 stop12h 40m

$398

SeattleBrussels

SEA - BRU

SEABRU

Seattle/Tacoma Intl

mié. 8/6

11:02 am-9:00 am

1 stop12h 58m

Brussels Bruxelles-National

mié. 8/20

12:00 pm-8:42 pm

1 stop17h 42m

$435

SeattleBrussels

SEA - BRU

SEABRU

Seattle/Tacoma Intl

dom. 8/3

7:20 am-8:00 am

1 stop15h 40m

Brussels Bruxelles-National

mar. 8/19

10:00 am-10:16 pm

2 stops21h 16m

$444

SeattleBrussels

SEA - BRU

SEABRU

Seattle/Tacoma Intl

dom. 8/3

7:20 am-8:00 am

1 stop15h 40m

Brussels Bruxelles-National

mar. 8/19

10:00 am-8:41 pm

1 stop19h 41m

$463

SeattleBrussels

SEA - BRU

SEABRU

Seattle/Tacoma Intl

jue. 10/2

3:45 pm-12:50 pm

1 stop12h 05m

Brussels Bruxelles-National

vie. 10/10

1:50 pm-8:40 pm

1 stop15h 50m

$465

SeattleBrussels

SEA - BRU

SEABRU

Seattle/Tacoma Intl

mié. 8/6

7:20 am-8:00 am

1 stop15h 40m

Brussels Bruxelles-National

vie. 8/22

10:00 am-3:52 pm

2 stops38h 52m

$478

SeattleBrussels

SEA - BRU

SEABRU

Seattle/Tacoma Intl

sáb. 8/2

9:45 pm-8:30 am

1 stop25h 45m

Brussels Bruxelles-National

mar. 8/19

10:45 am-11:15 pm

1 stop21h 30m

$498

SeattleBrussels

SEA - BRU

SEABRU

Seattle/Tacoma Intl

dom. 8/3

2:55 pm-8:00 am

2 stops32h 05m

Brussels Bruxelles-National

vie. 8/15

10:00 am-2:16 pm

2 stops37h 16m

$520

SeattleBrussels

SEA - BRU

SEABRU

Seattle/Tacoma Intl

mié. 8/6

2:50 pm-10:15 am

2 stops34h 25m

Brussels Bruxelles-National

sáb. 8/23

9:40 am-10:59 pm

2 stops22h 19m

$594

SeattleBrussels

SEA - BRU

SEABRU

Seattle/Tacoma Intl

vie. 8/22

1:30 pm-9:15 pm

1 stop22h 45m

Brussels Bruxelles-National

lun. 9/1

7:05 pm-11:10 am

1 stop25h 05m

$603

Flights are sorted by cheapest round-trip flights first.

Deals found on 6/12

Showing 1-10 of 30 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 June 9, 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 87 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 $1,096). 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 junio 12, 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 December 16, 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 junio 12, 2025.
Read reviews from past customers who have flown Delta, Austrian Airlines and Air France 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
7,950 reviews

Boarding

8.2

Food

7.3

Crew

8.5

Comfort

7.9

Overall

8.0

Entertainment

7.9

Reviews

1 / 20
10.0
Excellent

Kim,May 2025

PIH - SLC

This trip was fine even with delay I had plenty of time to get connection flight!
Delta
8.0
Very good
7,950 reviews
Delta
8.0
Very good
7,950 reviews

Boarding

8.2

Food

7.3

Crew

8.5

Comfort

7.9

Overall

8.0

Entertainment

7.9

Reviews

1 / 20
10.0
Excellent

Kim,May 2025

PIH - SLC

This trip was fine even with delay I had plenty of time to get connection flight!
Austrian Airlines
7.6
Good
802 reviews
Delta
8.0
Very good
7,950 reviews

Boarding

8.2

Food

7.3

Crew

8.5

Comfort

7.9

Overall

8.0

Entertainment

7.9

Reviews

1 / 20
10.0
Excellent

Kim,May 2025

PIH - SLC

This trip was fine even with delay I had plenty of time to get connection flight!
Air France
7.5
Good
1,463 reviews
Delta
8.0
Very good
7,950 reviews

Boarding

8.2

Food

7.3

Crew

8.5

Comfort

7.9

Overall

8.0

Entertainment

7.9

Reviews

1 / 20
10.0
Excellent

Kim,May 2025

PIH - SLC

This trip was fine even with delay I had plenty of time to get connection flight!
SWISS
7.5
Good
1,623 reviews
Delta
8.0
Very good
7,950 reviews

Boarding

8.2

Food

7.3

Crew

8.5

Comfort

7.9

Overall

8.0

Entertainment

7.9

Reviews

1 / 20
10.0
Excellent

Kim,May 2025

PIH - SLC

This trip was fine even with delay I had plenty of time to get connection flight!
United Airlines
7.4
Good
8,790 reviews
Delta
8.0
Very good
7,950 reviews

Boarding

8.2

Food

7.3

Crew

8.5

Comfort

7.9

Overall

8.0

Entertainment

7.9

Reviews

1 / 20
10.0
Excellent

Kim,May 2025

PIH - SLC

This trip was fine even with delay I had plenty of time to get connection flight!

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?

    Scandinavian Airlines, at $398, was found to be the cheapest airline from Seattle to Brussels.Alternate airlines to your destination round-trip include Brussels Airlines and Air Canada. Users have found that Scandinavian Airlines is 36% 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 $214. However, be on the lookout for offers from TAP AIR PORTUGAL 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 $1,096). 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

Toggle through the tabs below to find thousands of options on Cheapflights for your next trip.

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 junio 12, 2025.
AirlineCheapestAverageFlexibilityOn-time
IcelandairCheapest$393Average$512FlexibilityNo cancel feeOn-time76%
British AirwaysCheapest$495Average$678FlexibilityNo cancel feeOn-time70%
American AirlinesCheapest$501Average$589FlexibilityNo cancel feeOn-time71%
Air CanadaCheapest$518Average$740FlexibilityNo cancel feeOn-time67%
United AirlinesCheapest$529Average$699FlexibilityNo cancel feeOn-time69%
KLMCheapest$530Average$663FlexibilityNo cancel feeOn-time75%
Aer LingusCheapest$532Average$556FlexibilityNo cancel feeOn-timeN/A
DeltaCheapest$534Average$769FlexibilityNo cancel feeOn-timeN/A
Air FranceCheapest$547Average$739FlexibilityNo cancel feeOn-time77%
LufthansaCheapest$570Average$737FlexibilityNo cancel feeOn-time76%

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