HomeSearch by dateVacation packagesHotelsFlight dealsCar rentalTravel tips & news
Brussels

$198+ 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 4/27. Fares are subject to change and may not be available on all flights or dates of travel.
SEA — BRU
Apr 5 — Apr 121
Sat 4/5
Sat 4/12
1 adult, Economy
We work with more than 300 partners to bring you better travel deals

Find cheap flights from Seattle to Brussels with Cheapflights

1. Tell us where you want to go
Enter your travel information like dates, passengers, trip type (one-way or round trip), and preferred cabin class then click “Find deals”
2. Select your favorite providers
We find the providers serving your travel needs. Choose up to four travel providers to compare side-by-side for flights, hotels, or car rentals.
3. Compare prices and book
Review each provider’s pricing and select the best option for you! Book through your favorite provider’s website for a seamless experience.

Cheapflights Tip: The best prices from Seattle/Tacoma Intl to Brussels are usually found in February or January, 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 March 31, 2025.

Round-trip from

$460
(Gotogate)

One-way from

$198
(oojo)

Popular in

June

Cheapest in

February

Average price

$581
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 ($180 potential increase over avg. RT price).
Search Deals
Cheapest flight prices on average. 3% potential price decrease ($26 potential savings vs. average RT price).
Search Deals
Average for round-trip flights in March 2025
Search Deals

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 March 31, 2025.

This Gotogate deal was found by Cheapflights users on 3/30. 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 4/243:45 pmSEA - BRU
1 stop12h 05mIcelandair
Wed 5/71:50 pmBRU - SEA
1 stop15h 50mIcelandair
Deal found 3/30$460
This oojo deal was found by Cheapflights users on 3/30. 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 6/14:00 pmSEA - BRU
1 stop17h 30mScandinavian Airlines
Wed 6/1110:20 amBRU - SEA
1 stop12h 30mScandinavian Airlines
Deal found 3/30$475
This United Airlines deal was found by Cheapflights users on 3/31. 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 11/16:20 pmSEA - BRU
2 stops30h 35mUnited Airlines
Tue 11/1811:55 amBRU - SEA
2 stops19h 34mUnited Airlines
Deal found 3/31$547
This Virgin Atlantic deal was found by Cheapflights users on 3/31. 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.
Sat 11/13:30 pmSEA - BRU
1 stop33h 30mVirgin Atlantic
Tue 11/1811:00 amBRU - SEA
1 stop17h 29mVirgin Atlantic
Deal found 3/31$548
This Kiwi.com deal was found by Cheapflights users on 3/31. 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.
Sat 4/267:00 pmSEA - BRU
1 stop32h 50mMultiple Airlines
Sat 5/310:05 pmBRU - SEA
2 stops31h 23mMultiple Airlines
Deal found 3/31$552
This Justfly.com deal was found by Cheapflights users on 3/30. 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.
Sat 5/107:15 pmSEA - BRU
2 stops27h 50mAir Canada
Tue 6/109:40 amBRU - SEA
2 stops17h 53mAir Canada
Deal found 3/30$604
This SWISS deal was found by Cheapflights users on 3/29. 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.
Tue 9/231:45 pmSEA - BRU
2 stops15h 30mSWISS
Mon 10/68:05 pmBRU - SEA
2 stops31h 31mSWISS
Deal found 3/29$634
This Delta deal was found by Cheapflights users on 3/29. 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 Delta is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Sat 9/205:30 pmSEA - BRU
2 stops30h 10mDelta
Mon 10/610:25 amBRU - SEA
1 stop34h 25mDelta
Deal found 3/29$635
This Booking.com deal was found by Cheapflights users on 3/30. 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.
Sat 12/136:50 pmSEA - BRU
1 stop12h 50mBritish Airways
Wed 12/3111:50 amBRU - SEA
1 stop14h 05mBritish Airways
Deal found 3/30$642
This American Airlines deal was found by Cheapflights users on 3/30. 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.
Sat 12/131:44 pmSEA - BRU
2 stops17h 56mAmerican Airlines
Wed 12/3111:50 amBRU - SEA
1 stop14h 05mAmerican Airlines
Deal found 3/30$645
This Finnair deal was found by Cheapflights users on 3/30. 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.
Thu 5/155:40 pmSEA - BRU
1 stop15h 40mFinnair
Thu 5/226:35 amBRU - SEA
1 stop18h 25mFinnair
Deal found 3/30$667
This oojo deal was found by Cheapflights users on 3/30. 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 12/1310:29 pmSEA - BRU
2 stops27h 31mTAP AIR PORTUGAL
Wed 12/315:55 pmBRU - SEA
2 stops36h 30mTAP AIR PORTUGAL
Deal found 3/30$686

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 March 31, 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 4/24

3:45 pm-12:50 pm

1 stop12h 05m

Brussels Bruxelles-National

Wed 5/7

1:50 pm-8:40 pm

1 stop15h 50m

$460

SeattleBrussels

SEA - BRU

SEABRU

Seattle/Tacoma Intl

Sun 6/1

4:00 pm-6:30 pm

1 stop17h 30m

Brussels Bruxelles-National

Wed 6/11

10:20 am-1:50 pm

1 stop12h 30m

$475

SeattleBrussels

SEA - BRU

SEABRU

Seattle/Tacoma Intl

Sat 4/26

7:00 pm-12:50 pm

1 stop32h 50m

Brussels Bruxelles-National

Sat 5/3

10:05 pm-8:28 pm

2 stops31h 23m

$552

SeattleBrussels

SEA - BRU

SEABRU

Seattle/Tacoma Intl

Wed 9/24

7:20 am-8:05 am

1 stop15h 45m

Brussels Bruxelles-National

Tue 10/7

10:00 am-7:31 pm

1 stop18h 31m

$598

SeattleBrussels

SEA - BRU

SEABRU

Seattle/Tacoma Intl

Sat 5/10

7:15 pm-8:05 am

2 stops27h 50m

Brussels Bruxelles-National

Tue 6/10

9:40 am-6:33 pm

2 stops17h 53m

$604

SeattleBrussels

SEA - BRU

SEABRU

Seattle/Tacoma Intl

Tue 9/23

1:45 pm-2:15 pm

2 stops15h 30m

Brussels Bruxelles-National

Mon 10/6

8:05 pm-6:36 pm

2 stops31h 31m

$634

SeattleBrussels

SEA - BRU

SEABRU

Seattle/Tacoma Intl

Sat 9/20

5:30 pm-8:40 am

2 stops30h 10m

Brussels Bruxelles-National

Mon 10/6

10:25 am-11:50 am

1 stop34h 25m

$635

SeattleBrussels

SEA - BRU

SEABRU

Seattle/Tacoma Intl

Thu 5/15

5:40 pm-6:20 pm

1 stop15h 40m

Brussels Bruxelles-National

Thu 5/22

6:35 am-4:00 pm

1 stop18h 25m

$667

SeattleBrussels

SEA - BRU

SEABRU

Seattle/Tacoma Intl

Wed 7/16

8:20 pm-8:25 pm

1 stop15h 05m

Brussels Bruxelles-National

Fri 8/1

10:45 am-11:50 pm

2 stops22h 05m

$683

SeattleBrussels

SEA - BRU

SEABRU

Seattle/Tacoma Intl

Wed 6/25

7:20 am-8:40 am

1 stop16h 20m

Brussels Bruxelles-National

Wed 7/2

10:45 am-11:05 pm

1 stop21h 20m

$686

Flights are sorted by cheapest round-trip flights first.

Deals found on 3/31

Showing 1-10 of 25 results
1
2
3

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 March 28, 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 $1,146). 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 March 31, 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 March 31, 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
7,899 reviews

Boarding

8.2

Entertainment

7.9

Comfort

8.0

Crew

8.5

Food

7.3

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
7,899 reviews
Delta
8.0
Very good
7,899 reviews

Boarding

8.2

Entertainment

7.9

Comfort

8.0

Crew

8.5

Food

7.3

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
1,321 reviews
Delta
8.0
Very good
7,899 reviews

Boarding

8.2

Entertainment

7.9

Comfort

8.0

Crew

8.5

Food

7.3

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.
Finnair
7.6
Good
1,267 reviews
Delta
8.0
Very good
7,899 reviews

Boarding

8.2

Entertainment

7.9

Comfort

8.0

Crew

8.5

Food

7.3

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
1,570 reviews
Delta
8.0
Very good
7,899 reviews

Boarding

8.2

Entertainment

7.9

Comfort

8.0

Crew

8.5

Food

7.3

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
8,614 reviews
Delta
8.0
Very good
7,899 reviews

Boarding

8.2

Entertainment

7.9

Comfort

8.0

Crew

8.5

Food

7.3

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 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 $460, was found to be the cheapest airline from Seattle to Brussels.Alternate airlines to your destination round-trip include Scandinavian Airlines and United Airlines. Users have found that Icelandair is 30% 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 $198. However, be on the lookout for offers from TAP AIR PORTUGAL and United Airlines, 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

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 March 31, 2025.
AirlineCheapestAverageFlexibilityOn-time
IcelandairCheapest$404Average$547FlexibilityNo cancel feeOn-time76%
British AirwaysCheapest$501Average$712FlexibilityNo cancel feeOn-time70%
American AirlinesCheapest$501Average$637FlexibilityNo cancel feeOn-time71%
United AirlinesCheapest$529Average$650FlexibilityNo cancel feeOn-time69%
Aer LingusCheapest$532Average$537FlexibilityNo cancel feeOn-timeN/A
KLMCheapest$532Average$690FlexibilityNo cancel feeOn-time75%
Air CanadaCheapest$543Average$724FlexibilityNo cancel feeOn-time67%
DeltaCheapest$549Average$793FlexibilityNo cancel feeOn-timeN/A
Air FranceCheapest$554Average$782FlexibilityNo cancel feeOn-time77%
LufthansaCheapest$580Average$752FlexibilityNo cancel feeOn-time76%
100% Free
Cheapflights is completely free to use, so you can start saving the moment you arrive.
Book with Flexibility
Our users can plan ahead with confidence and find flights with no change fees
Travel Smart
Millions of people come to us for their flight needs every year. We help make travel planning easy by providing useful insights and data-driven graphs that can inform your decisions.