Latest deals
Insights
FAQs
Reviews
Price Alerts

Cheap flights from Seattle to Brussels from $383

This is the cheapest round-trip flight price found by a momondo user in the last 72 hours by searching for a flight from Seattle to Brussels departing on 1/17. 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

Discover deals from 900+ travel sites with momondo.

Save money when you book flights with momondo

Big names and deals

Big names and deals

Search 100s of travel sites to compare prices.

Filter for what you want

Filter for what you want

Free Wi-Fi? Stopover? Instantly customize your results.

Trusted and free

Trusted and free

We’re completely free to use - no hidden charges or fees.

Price Alerts

Price Alerts

Not ready to book? to track prices.
Search flight deals

Find the cheapest flights from Seattle to Brussels

Cheap round-trip flights

Enter your travel dates to find the best prices.
Icelandair Logo
2:35 pm - 11:55 am
SEA
-
BRU
12h 20m1 stop
Icelandair Logo
12:50 pm - 5:00 pm
BRU
-
SEA
13h 10m1 stop
$383Icelandair
Sat, Jan 17 - Fri, Jan 30
Icelandair Logo
2:35 pm - 11:55 am
SEA
-
BRU
12h 20m1 stop
Icelandair Logo
12:50 pm - 5:00 pm
BRU
-
SEA
13h 10m1 stop
$389Icelandair
Sat, Jan 17 - Fri, Jan 30
Icelandair Logo
2:35 pm - 11:55 am
SEA
-
BRU
12h 20m1 stop
Icelandair Logo
12:50 pm - 5:00 pm
BRU
-
SEA
13h 10m1 stop
$393Icelandair
Wed, Feb 4 - Fri, Feb 13
Icelandair Logo
3:35 pm - 11:55 am
SEA
-
BRU
12h 20m1 stop
Icelandair Logo
1:50 pm - 5:50 pm
BRU
-
SEA
13h 00m1 stop
$394Icelandair
Wed, Mar 25 - Mon, Mar 30
Icelandair Logo
2:35 pm - 11:55 am
SEA
-
BRU
12h 20m1 stop
Icelandair Logo
12:50 pm - 5:00 pm
BRU
-
SEA
13h 10m1 stop
$414Icelandair
Wed, Jan 14 - Fri, Jan 23
Air Canada Logo
3:40 pm - 7:50 am
SEA
-
BRU
31h 10m2 stops
Air Canada Logo
10:00 am - 9:31 am
BRU
-
SEA
32h 31m2 stops
$419Air Canada
Sat, Jan 17 - Fri, Jan 30
Brussels Airlines Logo
10:58 am - 8:55 am
SEA
-
BRU
12h 57m1 stop
Brussels Airlines Logo
10:10 am - 6:14 pm
BRU
-
SEA
17h 04m1 stop
$421Brussels Airlines
Wed, Jan 14 - Wed, Jan 21
Lufthansa Logo
7:00 am - 8:55 am
SEA
-
BRU
16h 55m1 stop
Lufthansa Logo
11:55 am - 8:57 pm
BRU
-
SEA
18h 02m1 stop
$426Lufthansa
Fri, Jan 16 - Fri, Jan 23
Multiple Airlines Logo
8:10 am - 9:40 pm
SEA
-
CRL
28h 30m3 stops
Multiple Airlines Logo
9:40 pm - 10:16 pm
CRL
-
SEA
33h 36m2 stops
$631Multiple Airlines
Sat, Jan 17 - Sat, Jan 24
Multiple Airlines Logo
8:10 am - 9:40 pm
SEA
-
CRL
28h 30m3 stops
Multiple Airlines Logo
7:00 am - 9:31 am
CRL
-
SEA
35h 31m3 stops
$642Multiple Airlines
Sat, Jan 17 - Sat, Jan 24

Icelandair flights from Seattle to Brussels

Our best Icelandair deals on Seattle to Brussels flight tickets
Icelandair
Jan 10
SEA2:35 pmSeattle/Tacoma Intl
12h 20m
1 stop
BRU11:55 amBrussels Bruxelles-National
Jan 23
BRU12:50 pmBrussels Bruxelles-National
13h 10m
1 stop
SEA5:00 pmSeattle/Tacoma Intl
$385
Find similar
Icelandair
Jan 17
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
$389
Find similar
Icelandair
Jan 28
SEA2:35 pmSeattle/Tacoma Intl
12h 20m
1 stop
BRU11:55 amBrussels Bruxelles-National
Feb 1
BRU12:50 pmBrussels Bruxelles-National
13h 10m
1 stop
SEA5:00 pmSeattle/Tacoma Intl
$416
Find similar

British Airways flights from Seattle to Brussels

Our best British Airways deals on Seattle to Brussels flight tickets
British Airways
Feb 10
SEA6:50 pmSeattle/Tacoma Intl
34h 00m
1 stop
BRU1:50 pmBrussels Bruxelles-National
Mar 10
BRU9:45 pmBrussels Bruxelles-National
28h 10m
1 stop
SEA5:55 pmSeattle/Tacoma Intl
$454
Find similar
British Airways
Mar 3
SEA7:15 amSeattle/Tacoma Intl
24h 45m
2 stops
BRU5:00 pmBrussels Bruxelles-National
Apr 1
BRU10:55 amBrussels Bruxelles-National
16h 30m
1 stop
SEA6:25 pmSeattle/Tacoma Intl
$455
Find similar
British Airways
Mar 23
SEA7:15 amSeattle/Tacoma Intl
29h 45m
2 stops
BRU9:00 pmBrussels Bruxelles-National
Apr 1
BRU10:55 amBrussels Bruxelles-National
16h 30m
1 stop
SEA6:25 pmSeattle/Tacoma Intl
$457
Find similar

momondo 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, momondo users made 832,500 searches. Data last updated December 5, 2025.
Use the filters below to find and compare flights from Seattle to Brussels that are best for you.

Fly from

Fly to

Route

Depart

Return

Price

SeattleBrussels

SEA - BRU

SEABRU

Seattle/Tacoma Intl

Sat 1/17

2:35 pm-11:55 am

1 stop12h 20m

Brussels Bruxelles-National

Fri 1/30

12:50 pm-5:00 pm

1 stop13h 10m

$383

SeattleBrussels

SEA - BRU

SEABRU

Seattle/Tacoma Intl

Sat 1/17

2:35 pm-11:55 am

1 stop12h 20m

Brussels Bruxelles-National

Fri 1/30

12:50 pm-5:00 pm

1 stop13h 10m

$389

SeattleBrussels

SEA - BRU

SEABRU

Seattle/Tacoma Intl

Wed 2/4

2:35 pm-11:55 am

1 stop12h 20m

Brussels Bruxelles-National

Fri 2/13

12:50 pm-5:00 pm

1 stop13h 10m

$393

SeattleBrussels

SEA - BRU

SEABRU

Seattle/Tacoma Intl

Wed 3/25

3:35 pm-11:55 am

1 stop12h 20m

Brussels Bruxelles-National

Mon 3/30

1:50 pm-5:50 pm

1 stop13h 00m

$394

SeattleBrussels

SEA - BRU

SEABRU

Seattle/Tacoma Intl

Wed 1/14

2:35 pm-11:55 am

1 stop12h 20m

Brussels Bruxelles-National

Fri 1/23

12:50 pm-5:00 pm

1 stop13h 10m

$414

SeattleBrussels

SEA - BRU

SEABRU

Seattle/Tacoma Intl

Sat 1/17

3:40 pm-7:50 am

2 stops31h 10m

Brussels Bruxelles-National

Fri 1/30

10:00 am-9:31 am

2 stops32h 31m

$419

SeattleBrussels

SEA - BRU

SEABRU

Seattle/Tacoma Intl

Wed 1/14

10:58 am-8:55 am

1 stop12h 57m

Brussels Bruxelles-National

Wed 1/21

10:10 am-6:14 pm

1 stop17h 04m

$421

SeattleBrussels

SEA - BRU

SEABRU

Seattle/Tacoma Intl

Fri 1/16

7:00 am-8:55 am

1 stop16h 55m

Brussels Bruxelles-National

Fri 1/23

11:55 am-8:57 pm

1 stop18h 02m

$426

SeattleBrussels

SEA - CRL

SEACRL

Seattle/Tacoma Intl

Sat 1/17

8:10 am-9:40 pm

3 stops28h 30m

Charleroi Brussels

Sat 1/24

9:40 pm-10:16 pm

2 stops33h 36m

$631

SeattleBrussels

SEA - CRL

SEACRL

Seattle/Tacoma Intl

Sat 1/17

8:10 am-9:40 pm

3 stops28h 30m

Charleroi Brussels

Sat 1/24

7:00 am-9:31 am

3 stops35h 31m

$642

Flights are sorted by cheapest round-trip flights first.

Showing 1-10 of 20 resultsSorted by cheapest first
1
2

See travel insights to Brussels from

How to get the cheapest flight ticket from Seattle to Brussels

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?

What is the cheapest month to fly to Brussels?

In general, October is the cheapest month to fly from Seattle to Brussels. Due to it being the ‘off-season’ during this time, you can expect flight prices to be around $476. If you are unable to visit Brussels during the month of October, then departing from Seattle during the month September is also very affordable. Most momondo users find prices during this month for around $514.

What is the cheapest day to depart on your flight to Brussels?

On average, the least expensive day to fly to Brussels from Seattle is on a Tuesday. momondo users have found tickets for Tuesday departures for as low as $626. However, this price may fluctuate depending on the airline, the season, and holidays. On the other hand, Wednesday is the most expensive day to depart from Seattle because it is more convenient for both business and leisure travelers. As a result, prices tend to be around $783.

What is the cheapest time of day to depart on your flight to Brussels?

According to our data, the cheapest time of day to fly to Brussels is in the morning. momondo users have found flights departing from Seattle to Brussels in the morning for as low as $668. Keep in mind that these prices may fluctuate based on what airline you choose and the time of year you plan to travel. Flights at noon are often more expensive with an average ticket price of $738.

How far in advance should I book a flight to Brussels?

You are more likely to see cheaper flights to Brussels from Seattle when booking weeks ahead of your departure date. In general, you can expect to find flights to Brussels for around $636 when searching weeks out. However, flight prices might be lower outside of this timeframe. For example, people recently found flights to Brussels from Seattle for as low as $537 on momondo.

Cheap Seattle to Brussels flight deals and tips

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

Fastest flight time

12h 15m

Direct flights

None
The fastest flight from Seattle to Brussels takes 12h 15m
There are no direct flights from Seattle to Brussels. There are no popular flight routes from Seattle to Brussels.
Search flight deals

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

    A flight from Seattle/Tacoma Intl to Brussels will travel around 4931.7 mi. 12h 15m is a normal flight duration for this route.

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

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

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

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

    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.

  • What documentation or ID do you need to fly to Brussels?

    The travel and health documents required for your trip to Brussels 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. We always recommend checking with your airline or a trusted third party such as IATA to get advice.

Best airlines flying from Seattle to Brussels

Compare and see reviews for airlines that fly from Seattle to Brussels with momondo
Airline
Rating
Free Cancellation
Price
IcelandairPriceFrom $387Free CancellationRating
7.0
584 reviews
Search Icelandair flights
DeltaPriceFrom $482Free CancellationRating
7.9
8,009 reviews
Search Delta flights
United AirlinesPriceFrom $483Free CancellationRating
7.4
9,065 reviews
Search United Airlines flights
Virgin AtlanticPriceFrom $488Free CancellationRating
7.5
675 reviews
Search Virgin Atlantic flights
LufthansaPriceFrom $501Free CancellationRating
6.8
7,612 reviews
Search Lufthansa flights
British AirwaysPriceFrom $503Free CancellationRating
6.7
7,562 reviews
Search British Airways flights
Air FrancePriceFrom $506Free CancellationRating
7.4
1,500 reviews
Search Air France flights
KLMPriceFrom $511Free CancellationRating
7.7
1,430 reviews
Search KLM flights
Air CanadaPriceFrom $518Free CancellationRating
7.1
10,500 reviews
Search Air Canada flights
Aer LingusPriceFrom $532Free CancellationRating
7.2
1,384 reviews
Search Aer Lingus flights

Why use momondo?

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

It is quick and easy to find Seattle to Brussels flights on momondo. We search and return numerous flight options from various airlines and agents. You can then use our filters to narrow your search until you have found the most convenient flight to Brussels that suits you.

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

Yes. momondo allows you to filter the results for Seattle to Brussels flights to just show those with flexible booking policies.

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

momondo helps you find the best flight between Seattle and Brussels by providing filters to narrow your choice of flights to those matching your criteria. You can select flights based on numerous factors such as price, departure and landing times, airport and airline.

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

If you are not ready to book a flight from Seattle to Brussels now, use our insights above to find helpful tips or alternatively set up a price alert, where momondo will track prices on flights to Brussels and let you know when they change.

An easier way to manage your Brussels trip

We make it super easy to schedule, organize and travel with friends or family. Trips is free — and available to use no matter where you book.
Start using Trips
Find my bookings

Get notified when prices go down

Daily price changes in your inbox - only with Price Alerts.
1 adult
Sun 1/4
Sun 1/11
By creating a price alert you accept our terms of use and privacy policy.

Find better results for your trip to Belgium

Fly into one of these airports located in Brussels

Airports listed have a maximum distance of 27.4 mi from Brussels
Brussels Bruxelles-National Airport
Charleroi Brussels Airport