$182 Cheap Flights from Seattle (SEA) to Brussels (BRU)

View $182 flight on Sun, Oct 12, 2025Opens in a new window

Popular airlines from Seattle-Tacoma International Airport (SEA) to Brussels Airport (BRU)

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Cheap Flights from Seattle to Brussels (SEA-BRU)

Prices were available within the past 7 days and start at $182 for one-way flights and $387 for round trip, for the period specified. Prices and availability are subject to change. Additional terms apply.

Scandinavian Airlines
Sun, Oct 12 - Thu, Oct 23
SEA
Seattle
BRU
Brussels
$387 Roundtrip, just found
$387
Roundtrip
just found
Select Scandinavian Airlines flight, departing Sun, Oct 12 from Seattle to Brussels, returning Thu, Oct 23, priced at $387 just found
Aer Lingus
Wed, Nov 26 - Wed, Dec 10
SEA
Seattle
BRU
Brussels
$402 Roundtrip, found 18 hours ago
$402
Roundtrip
found 18 hours ago
Select Aer Lingus flight, departing Wed, Nov 26 from Seattle to Brussels, returning Wed, Dec 10, priced at $402 found 18 hours ago
Icelandair
Thu, Oct 2 - Thu, Oct 16
SEA
Seattle
BRU
Brussels
$415 Roundtrip, found 1 day ago
$415
Roundtrip
found 1 day ago
Select Icelandair flight, departing Thu, Oct 2 from Seattle to Brussels, returning Thu, Oct 16, priced at $415 found 1 day ago
Air Canada
Wed, Nov 5 - Thu, Nov 13
SEA
Seattle
BRU
Brussels
$441 Roundtrip, found 5 days ago
$441
Roundtrip
found 5 days ago
Select Air Canada flight, departing Wed, Nov 5 from Seattle to Brussels, returning Thu, Nov 13, priced at $441 found 5 days ago
KLM
Sun, Jul 6 - Tue, Jul 22
SEA
Seattle
ZYR
Brussels
$446 Roundtrip, found 1 day ago
$446
Roundtrip
found 1 day ago
Select KLM flight, departing Sun, Jul 6 from Seattle to Brussels, returning Tue, Jul 22, priced at $446 found 1 day ago
United
Mon, Nov 3 - Mon, Nov 10
SEA
Seattle
BRU
Brussels
$455 Roundtrip, found 6 days ago
$455
Roundtrip
found 6 days ago
Select United flight, departing Mon, Nov 3 from Seattle to Brussels, returning Mon, Nov 10, priced at $455 found 6 days ago
Delta
Wed, Nov 5 - Tue, Nov 25
SEA
Seattle
BRU
Brussels
$456 Roundtrip, found 5 days ago
$456
Roundtrip
found 5 days ago
Select Delta flight, departing Wed, Nov 5 from Seattle to Brussels, returning Tue, Nov 25, priced at $456 found 5 days ago
Virgin Atlantic
Wed, Aug 20 - Tue, Aug 26
SEA
Seattle
BRU
Brussels
$456 Roundtrip, found 1 day ago
$456
Roundtrip
found 1 day ago
Select Virgin Atlantic flight, departing Wed, Aug 20 from Seattle to Brussels, returning Tue, Aug 26, priced at $456 found 1 day ago
Lufthansa
Wed, Nov 5 - Thu, Nov 13
SEA
Seattle
BRU
Brussels
$463 Roundtrip, found 5 days ago
$463
Roundtrip
found 5 days ago
Select Lufthansa flight, departing Wed, Nov 5 from Seattle to Brussels, returning Thu, Nov 13, priced at $463 found 5 days ago
British Airways
Sun, Aug 10 - Thu, Aug 21
SEA
Seattle
BRU
Brussels
$475 Roundtrip, found 2 days ago
$475
Roundtrip
found 2 days ago
Select British Airways flight, departing Sun, Aug 10 from Seattle to Brussels, returning Thu, Aug 21, priced at $475 found 2 days ago

Find the cheapest month to fly from Seattle (SEA) to Brussels (BRU)

February is typically the cheapest month to fly

From $413 - $1,177 per traveler.

Graph displaying average flight prices per month

Alternative airports near Brussels

Prices were available within the past 7 days. Prices and availability are subject to change.

Select flight to Brussels - National BRU. Cheapest and Closest option available. Average driving time to city center is 15 minutes. Flights from $635
BRU
Brussels - National
CheapestClosest
Average driving time to city center15 min
Flights from $635
Flights from Seattle (SEA) to Brussels (BRU)
Origin airport
Seattle - Tacoma Intl.
Destination airport
Brussels - National
Airlines serving
Aer Lingus, Air Canada, Air France, American Airlines, Austrian Airlines, British Airways, Brussels Airlines, Delta, Finnair, Iberia, Icelandair, KLM, Lufthansa, Scandinavian Airlines, Swiss International Air Lines, Turkish Airlines, United, Virgin Atlantic
Roundtrip price
$386
Distance
4944 mi

Seattle to Brussels Flights

The cheapest times to fly from Seattle to Brussels

On average, Thursday can be the cheapest time to fly, according to data from the Airlines Reporting Corporation (ARC), one of the world's biggest databases for global airline sales. The data reveals that you could save up to 16% by flying on a Thursday—the cheapest day to travel on average—instead of a Sunday—the most expensive. Some of the most affordable flights from Seattle to Brussels are during the month of October. You can find some of the cheapest flights from Seattle to Brussels with Expedia's search tool and vast selection of airlines.

 

The best time to book a flight from Seattle to Brussels

Sunday is one of the best days to book for cheap flights from Seattle to Brussels: Tickets reserved on a Sunday cost between 6% and 13% less than those reserved on a Friday, according to ARC data. The data also suggests booking early can also lead to cheaper airfares. You could save 24% by buying your tickets for domestic flights at least a month in advance and 10% by booking international flights 2 months in advance.

 

How to find cheap round-trip tickets from Seattle to Brussels

Being flexible with your dates and using Expedia's Price Drop Protection and Price Tracking features are some of the best ways of finding a cheap ticket from Seattle to Brussels in 2025. You can also book with separate airlines for your outbound and return journeys, from $182 one-way. Expedia also offers Price Drop Protection, so if the cost of your airfare goes down after booking, you'll receive a credit for the difference*. This is available for a small fee, and is free to One Key Gold and Platinum tier members.

 

Expedia's Price Tracking feature means you can stay on top of airfares without manually checking every day. It sends you automated price alerts for cheap Seattle to Brussels flights and uses historical data to indicate when the best time to book is. Download Expedia's free app to activate this handy tool in a few easy taps.

 

You could also save big by booking one of Expedia's vacation packages. Bundling together your Seattle to Brussels airfare with your accommodations and car rental is often cheaper than booking everything separately. There’s also One Key, Expedia's generous rewards program. Join for free and you could earn One Key cash on most bookings to save on future adventures.

 

*Terms apply.

 

Disclaimer: ARC The statistics are based on average round-trip ticket prices between January and August 2023. The percentages you see are averages.

 

Frequently asked questions

How much does a flight from Seattle - Tacoma Intl. Airport (SEA) to Brussels - National Airport (BRU) cost?
Discover the latest flight deals from SEA to BRU by entering your preferred travel dates and searching on Expedia. Easily compare prices by departure date if you have flexibility with your schedule and use handy filters to explore prices for your preferred journey. As a member of One Key™, our free loyalty program, you can use Price Tracking to watch fares and receive notifications if prices go up or down.
What is the cheapest month to fly from SEA to BRU?
The cheapest flights from SEA to BRU are usually during off-peak season, when demand is lower. To save money, avoid flying during public holidays, school breaks and major local events.
What is the cheapest airline that flies from SEA to BRU?
Use the filter tool on Expedia to compare airlines and find the cheapest carrier that'll take you from SEA to BRU. Sort your results by "Price (lowest to highest)" to snap up a great deal.
How many flights per day from Seattle - Tacoma Intl. Airport (SEA) to Brussels - National Airport (BRU)?
You'll have to book a flight with a layover if you're traveling from Seattle - Tacoma Intl. Airport (SEA) to Brussels - National Airport (BRU). Direct flights don't operate daily on this route. However, simply filter your search to include one or two stops to discover an option that works for you.
What day of the week has the most flights from SEA to BRU?
Generally you'll find the most flight options available on a Friday. Tuesdays tend to be the quietest.* However, this can vary based on the season, airline and other factors.*Busiest/quietest day to travel is based on Expedia flight demand through January to December 2024.
What is the best time to fly from Seattle - Tacoma Intl. Airport (SEA) to Brussels - National Airport (BRU)?
To avoid potential delays on the Seattle - Tacoma Intl. Airport (SEA) to Brussels - National Airport (BRU) route, aim to travel before 3 PM. Flights after this time have a 22% higher chance of being canceled.**Most reliable time of the day and month to travel recommendation is based on January through August 2024 flight status data sourced from OAG's global flight data platform.
Is it cheaper to buy a plane ticket from Seattle - Tacoma Intl. Airport (SEA) to Brussels - National Airport (BRU) last-minute?
Booking your plane ticket from SEA to BRU right before your getaway is usually more expensive. However, if you're flexible with your departure times and dates, you could score a cheap last-minute fare.
Is it cheaper to book a SEA to BRU flight and hotel package?
You can save money by booking a SEA to BRU flight and hotel package compared to booking separately. In fact, travelers could save hundreds of dollars by bundling with Expedia. And it's easy to manage everything in one convenient place. After choosing your preferred flights and accommodations, consider adding extras such as activities, tours and car rentals.
Can I cancel or change the date of my flight from Seattle - Tacoma Intl. Airport (SEA) to Brussels - National Airport (BRU)?
It's usually possible to cancel or reschedule your SEA to BRU flight. However, if it's been more than 24 hours since booking, additional charges may apply. Check your airline's policies in your itinerary to see what changes are allowed and if any costs are involved. You'll also find further details on our Customer Service portal.

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*Available to One Key members.