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Cheap flights from Seattle to Brussels from $255

This is the cheapest one-way flight price found by a momondo user in the last 72 hours by searching for a flight from Seattle to Brussels departing on 10/18. Fares may change, and may not be available for all flights or travel dates. Click the price to refresh the search for this deal.
1 adult
0 bags

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Find the cheapest flights from Seattle to Brussels

Cheap round-trip flights

Icelandair Logo
3:45 pm - 12:50 pmSEA-BRU
12h 05m1 stop
Icelandair Logo
1:50 pm - 8:40 pmBRU-SEA
15h 50m1 stop
$400Icelandair
Find Deal
dom., oct. 12 - vie., oct. 24
Icelandair Logo
2:35 pm - 11:55 amSEA-BRU
12h 20m1 stop
Icelandair Logo
12:50 pm - 5:00 pmBRU-SEA
13h 10m1 stop
$409Icelandair
Find Deal
mié., ene. 21 - dom., ene. 25
United Airlines Logo
5:00 am - 7:15 amSEA-BRU
17h 15m2 stops
United Airlines Logo
10:00 am - 6:59 pmBRU-SEA
40h 59m2 stops
$435United Airlines
Find Deal
mar., feb. 10 - mar., mar. 10
United Airlines Logo
7:00 am - 8:05 amSEA-BRU
16h 05m2 stops
United Airlines Logo
10:00 am - 11:28 amBRU-SEA
34h 28m2 stops
$439United Airlines
Find Deal
mié., nov. 12 - mar., nov. 18
British Airways Logo
6:50 pm - 4:40 pmSEA-BRU
12h 50m1 stop
British Airways Logo
11:50 am - 11:30 amBRU-SEA
32h 40m1 stop
$476British Airways
Find Deal
dom., ene. 18 - lun., ene. 26
Delta Logo
7:25 am - 8:40 amSEA-BRU
16h 15m1 stop
Delta Logo
11:00 am - 10:18 amBRU-SEA
32h 18m1 stop
$500Delta
Find Deal
jue., oct. 23 - jue., nov. 6
Delta Logo
7:25 am - 8:40 amSEA-BRU
16h 15m1 stop
Delta Logo
11:00 am - 10:18 amBRU-SEA
32h 18m1 stop
$502Delta
Find Deal
jue., oct. 23 - jue., nov. 6
Lufthansa Logo
3:00 pm - 1:35 pmSEA-BRU
14h 35m1 stop
Lufthansa Logo
10:00 am - 7:16 pmBRU-SEA
18h 16m2 stops
$505Lufthansa
Find Deal
jue., oct. 30 - jue., nov. 6
British Airways Logo
6:50 pm - 4:40 pmSEA-BRU
12h 50m1 stop
British Airways Logo
7:25 pm - 4:55 pmBRU-SEA
30h 30m1 stop
$526British Airways
Find Deal
dom., ene. 18 - sáb., ene. 24
Lufthansa Logo
3:00 pm - 1:35 pmSEA-BRU
14h 35m1 stop
Lufthansa Logo
7:00 am - 12:10 pmBRU-SEA
14h 10m1 stop
$548Lufthansa
Find Deal
jue., oct. 30 - jue., nov. 6

Lufthansa flights from Seattle to Brussels Bruxelles-National Airport

Our best Lufthansa deals on Seattle to Brussels Bruxelles-National Airport flight tickets
Lufthansa
Oct 30
SEA3:00 pmSeattle/Tacoma Intl
14h 35m
1 stop
BRU1:35 pmBrussels Bruxelles-National
Nov 6
BRU10:00 amBrussels Bruxelles-National
18h 16m
2 stops
SEA7:16 pmSeattle/Tacoma Intl
$505
Find similar
Lufthansa
Oct 30
SEA3:00 pmSeattle/Tacoma Intl
14h 35m
1 stop
BRU1:35 pmBrussels Bruxelles-National
Nov 6
BRU7:00 amBrussels Bruxelles-National
14h 10m
1 stop
SEA12:10 pmSeattle/Tacoma Intl
$548
Find similar
Lufthansa
Sep 24
SEA6:50 pmSeattle/Tacoma Intl
12h 25m
1 stop
BRU4:15 pmBrussels Bruxelles-National
Oct 11
BRU9:35 amBrussels Bruxelles-National
35h 20m
2 stops
SEA11:55 amSeattle/Tacoma Intl
$645
Find similar

Icelandair flights from Seattle to Brussels Bruxelles-National Airport

Our best Icelandair deals on Seattle to Brussels Bruxelles-National Airport flight tickets
Icelandair
Oct 12
SEA3:45 pmSeattle/Tacoma Intl
12h 05m
1 stop
BRU12:50 pmBrussels Bruxelles-National
Oct 24
BRU1:50 pmBrussels Bruxelles-National
15h 50m
1 stop
SEA8:40 pmSeattle/Tacoma Intl
$400
Find similar
Icelandair
Jan 21
SEA2:35 pmSeattle/Tacoma Intl
12h 20m
1 stop
BRU11:55 amBrussels Bruxelles-National
Jan 25
BRU12:50 pmBrussels Bruxelles-National
13h 10m
1 stop
SEA5:00 pmSeattle/Tacoma Intl
$409
Find similar
Icelandair
Jan 21
SEA2:35 pmSeattle/Tacoma Intl
12h 20m
1 stop
BRU11:55 amBrussels Bruxelles-National
Jan 30
BRU12:50 pmBrussels Bruxelles-National
13h 10m
1 stop
SEA5:00 pmSeattle/Tacoma Intl
$416
Find similar

momondo Fare Finder

 
Customize your flight search to find flights from Seattle to Brussels Bruxelles-National Airport 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, momondo users made 832,500 searches. Data last updated septiembre 17, 2025.
Use the filters below to find and compare flights from Seattle to Brussels Bruxelles-National Airport that are best for you.

Fly from

Fly to

Route

Depart

Return

Price

SeattleBrussels

SEA - BRU

SEABRU

Seattle/Tacoma Intl

dom. 10/12

3:45 pm-12:50 pm

1 stop12h 05m

Brussels Bruxelles-National

vie. 10/24

1:50 pm-8:40 pm

1 stop15h 50m

$400

SeattleBrussels

SEA - BRU

SEABRU

Seattle/Tacoma Intl

mié. 1/21

2:35 pm-11:55 am

1 stop12h 20m

Brussels Bruxelles-National

dom. 1/25

12:50 pm-5:00 pm

1 stop13h 10m

$409

SeattleBrussels

SEA - BRU

SEABRU

Seattle/Tacoma Intl

mar. 2/10

5:00 am-7:15 am

2 stops17h 15m

Brussels Bruxelles-National

mar. 3/10

10:00 am-6:59 pm

2 stops40h 59m

$435

SeattleBrussels

SEA - BRU

SEABRU

Seattle/Tacoma Intl

mié. 11/12

7:00 am-8:05 am

2 stops16h 05m

Brussels Bruxelles-National

mar. 11/18

10:00 am-11:28 am

2 stops34h 28m

$439

SeattleBrussels

SEA - BRU

SEABRU

Seattle/Tacoma Intl

dom. 1/18

6:50 pm-4:40 pm

1 stop12h 50m

Brussels Bruxelles-National

lun. 1/26

11:50 am-11:30 am

1 stop32h 40m

$476

SeattleBrussels

SEA - BRU

SEABRU

Seattle/Tacoma Intl

jue. 10/23

7:25 am-8:40 am

1 stop16h 15m

Brussels Bruxelles-National

jue. 11/6

11:00 am-10:18 am

1 stop32h 18m

$500

SeattleBrussels

SEA - BRU

SEABRU

Seattle/Tacoma Intl

jue. 10/23

7:25 am-8:40 am

1 stop16h 15m

Brussels Bruxelles-National

jue. 11/6

11:00 am-10:18 am

1 stop32h 18m

$502

SeattleBrussels

SEA - BRU

SEABRU

Seattle/Tacoma Intl

jue. 10/30

3:00 pm-1:35 pm

1 stop14h 35m

Brussels Bruxelles-National

jue. 11/6

10:00 am-7:16 pm

2 stops18h 16m

$505

SeattleBrussels

SEA - BRU

SEABRU

Seattle/Tacoma Intl

dom. 1/18

6:50 pm-4:40 pm

1 stop12h 50m

Brussels Bruxelles-National

sáb. 1/24

7:25 pm-4:55 pm

1 stop30h 30m

$526

SeattleBrussels

SEA - BRU

SEABRU

Seattle/Tacoma Intl

jue. 10/30

3:00 pm-1:35 pm

1 stop14h 35m

Brussels Bruxelles-National

jue. 11/6

7:00 am-12:10 pm

1 stop14h 10m

$548

Flights are sorted by cheapest round-trip flights first.

Showing 1-10 of 20 resultsSorted by cheapest first
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See travel insights to Brussels from

How to get the cheapest flight ticket from Seattle to Brussels Bruxelles-National Airport

Look no further. We've gone through all the searches for this route on momondo so you have the important information and insights to find the cheapest flight ticket for your trip

What is the typical price of a round-trip flight between Seattle and Brussels Bruxelles-National Airport?

What is the cheapest month to fly to Brussels Bruxelles-National Airport?

The cheapest month to fly to Brussels Bruxelles-National Airport from Seattle is in September. Flight prices, which tend to average around $527, are often lower during this time because this is during the off-season. If you aren’t able to travel during the month of September, then book flights to Brussels Bruxelles-National Airport from Seattle during October instead. Flights to Brussels Bruxelles-National Airport in October, while not as cheap as those in September, still average around $533.

What is the cheapest day to depart on your flight to Brussels Bruxelles-National Airport?

The cheapest day to depart from Seattle to Brussels Bruxelles-National Airport is on a Tuesday. Travelers who choose to depart for Brussels Bruxelles-National Airport on a Tuesday will often find tickets for as low as $626. When flying out on a Wednesday, the most expensive travel day of the week, you can expect to see flight prices from Seattle to Brussels Bruxelles-National Airport for around $783.

What is the cheapest time of day to depart on your flight to Brussels Bruxelles-National Airport?

Our most recent data shows that the best time of day to fly to Brussels Bruxelles-National Airport is in the morning. Flights from Seattle to Brussels Bruxelles-National Airport during this time can be as low as $668. If you have a flexible travel schedule, then try to avoid flying at noon when prices are $738 on average. Flights to Brussels Bruxelles-National Airport from Seattle at noon are generally more expensive because this time of day is more convenient for travelers’ schedules.

How far in advance should I book a flight to Brussels Bruxelles-National Airport?

You are more likely to see cheaper flights to Brussels Bruxelles-National Airport from Seattle when booking weeks ahead of your departure date. In general, you can expect to find flights to Brussels Bruxelles-National Airport for around $628 when searching weeks out. However, flight prices might be lower outside of this timeframe. For example, people recently found flights to Brussels Bruxelles-National Airport from Seattle for as low as $513 on momondo.

When to book flights from Seattle to Brussels Bruxelles-National Airport

Are you open to changing your travel dates? Check out the ideal times to fly from Seattle to Brussels Bruxelles-National Airport according to our flight data. Find out which month and days have the cheapest flights.
Estimated round-trip price

Cheap Seattle to Brussels Bruxelles-National Airport (SEA to BRU) flight deals and tips

Find info about flight duration, direct flights, and airports for your flight from Seattle to Brussels Bruxelles-National Airport

Direct flights

None
There are no direct flights from Seattle to Brussels Bruxelles-National Airport. There are no popular flight routes from Seattle to Brussels Bruxelles-National Airport.
Search flight deals

  • How far is Seattle/Tacoma Intl to Brussels Bruxelles-National by plane?

    The straight-line distance from Seattle/Tacoma Intl to Brussels Bruxelles-National is 4932.2 mi. Typically, this will take 12h 05m by plane in normal conditions.

  • When did momondo last update prices for flights from Seattle/Tacoma Intl Airport to Brussels Bruxelles-National Airport?

    Prices for flights from Seattle/Tacoma Intl Airport to Brussels Bruxelles-National Airport refresh daily.

  • How many operators does momondo search for flights from Seattle/Tacoma Intl Airport to Brussels Bruxelles-National Airport?

  • How old do you have to be to fly from Seattle/Tacoma Intl Airport to Brussels Bruxelles-National Airport?

    The minimum age a child must be to fly alone is five but airlines that offer an unaccompanied minor (UNMR) service will have their own age restrictions, including rules around flight length, timings, and stopovers. We always recommend checking with the individual airline you are booking with to travel from Seattle/Tacoma Intl Airport to Brussels Bruxelles-National Airport.

  • What documentation or ID do you need to fly to Brussels Bruxelles-National Airport?

    The travel and health documents required for your trip to Brussels Bruxelles-National Airport can vary based on your itinerary and personal situation. As a rule, consider having multiple documents such as a national ID card or driver’s license, and a passport valid for six-months after you plan to arrive at Brussels Bruxelles-National Airport. We always recommend checking with your airline or a trusted third party such as IATA to get advice.

  • What is the most popular airline from Seattle to Brussels Bruxelles-National Airport?

Best airlines flying from Seattle to Brussels Bruxelles-National Airport

Compare and see reviews for airlines that fly from Seattle to Brussels Bruxelles-National Airport with momondo
Airline
Rating
Free Cancellation
Price
IcelandairPriceFrom $391Free CancellationRating
7.0
545 reviews
Search Icelandair flights
United AirlinesPriceFrom $483Free CancellationRating
7.4
8,926 reviews
Search United Airlines flights
Virgin AtlanticPriceFrom $488Free CancellationRating
7.4
664 reviews
Search Virgin Atlantic flights
British AirwaysPriceFrom $502Free CancellationRating
6.7
7,367 reviews
Search British Airways flights
Air FrancePriceFrom $506Free CancellationRating
7.4
1,468 reviews
Search Air France flights
DeltaPriceFrom $514Free CancellationRating
7.9
7,961 reviews
Search Delta flights
KLMPriceFrom $521Free CancellationRating
7.8
1,386 reviews
Search KLM flights
Aer LingusPriceFrom $532Free CancellationRating
7.2
1,277 reviews
Search Aer Lingus flights
Air CanadaPriceFrom $543Free CancellationRating
7.1
10,000 reviews
Search Air Canada flights
LufthansaPriceFrom $561Free CancellationRating
6.8
7,409 reviews
Search Lufthansa flights

Traveling to a place near Brussels?

Book flights to Brussels if you plan to visit one of these locations
Bruges
Ghent
Leuven
Charleroi
Hasselt
Spa
Namur
Aalst
Dinant
Mons
Zaventem
Waterloo
Genk
Mechelen
Francorchamps
Knokke-Heist
Tournai
Durbuy
Oostkamp
Halle

Why use momondo?

Why should I use momondo to find a flight deal from Seattle to Brussels?

momondo compares prices from hundreds of airlines and agents so you can find and book the best deal on flights from Seattle to Brussels. Millions of users trust and use momondo every year so you are in good hands.

Can I find flights from Seattle to Brussels with flexible booking policies on momondo?

Yes. momondo enables you to select and highlight flights to Brussels from Seattle with this policy.

How can momondo help me find flights from Seattle to Brussels?

momondo offers useful filters to help you find the right flight. Choose specific flight times, airports or even what payment method you prefer. We have numerous options to help you book your ideal flight from Seattle to Brussels.

I’m not ready to book a flight from Seattle to Brussels right now. Can momondo alert me if prices change?

Yes. momondo can track prices for Seattle to Brussels flights and alert you when they change. Perform a search to set up the price alert. All that is required is a valid email address.

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