Latest deals
Insights
FAQs
Reviews
Price Alerts

Cheap flights from Seattle to Belgium from $256

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 Belgium departing on 4/20. 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
1 adult, Economy, 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 Belgium

Cheap round-trip flights

Enter your travel dates to find the best prices.
Icelandair Logo
7:00 pm - 12:55 pm
SEA
-
BRU
32h 55m
1 stop
Icelandair Logo
1:50 pm - 5:55 pm
BRU
-
SEA
13h 05m
1 stop
$580Icelandair
Fri, Apr 24 - Thu, May 7
Icelandair Logo
3:40 pm - 12:55 pm
SEA
-
BRU
12h 15m
1 stop
Icelandair Logo
1:50 pm - 8:40 pm
BRU
-
SEA
15h 50m
1 stop
$605Icelandair
Thu, Apr 23 - Sun, Apr 26
Icelandair Logo
7:00 pm - 12:55 pm
SEA
-
BRU
32h 55m
1 stop
Icelandair Logo
1:50 pm - 5:55 pm
BRU
-
SEA
13h 05m
1 stop
$610Icelandair
Thu, May 7 - Wed, May 20
Icelandair Logo
7:00 pm - 12:55 pm
SEA
-
BRU
32h 55m
1 stop
Icelandair Logo
1:50 pm - 8:40 pm
BRU
-
SEA
15h 50m
1 stop
$618Icelandair
Mon, May 11 - Wed, May 20
Icelandair Logo
3:40 pm - 12:55 pm
SEA
-
BRU
12h 15m
1 stop
Icelandair Logo
1:50 pm - 8:40 pm
BRU
-
SEA
15h 50m
1 stop
$623Icelandair
Wed, Apr 22 - Thu, May 21
Icelandair Logo
7:00 pm - 12:55 pm
SEA
-
BRU
32h 55m
1 stop
Icelandair Logo
1:50 pm - 8:40 pm
BRU
-
SEA
15h 50m
1 stop
$625Icelandair
Tue, Apr 21 - Tue, May 26
Icelandair Logo
7:00 pm - 12:55 pm
SEA
-
BRU
32h 55m
1 stop
Icelandair Logo
1:50 pm - 5:55 pm
BRU
-
SEA
13h 05m
1 stop
$630Icelandair
Sat, Apr 18 - Sat, May 23
Icelandair Logo
7:00 pm - 12:55 pm
SEA
-
BRU
32h 55m
1 stop
Icelandair Logo
1:50 pm - 11:45 am
BRU
-
SEA
30h 55m
1 stop
$631Icelandair
Sat, Apr 18 - Sun, May 24
Multiple Airlines Logo
3:40 pm - 8:35 pm
SEA
-
CRL
19h 55m
2 stops
Multiple Airlines Logo
9:20 am - 10:08 am
CRL
-
SEA
33h 48m
3 stops
$761Multiple Airlines
Mon, Jun 1 - Wed, Jun 10
Multiple Airlines Logo
3:40 pm - 8:35 pm
SEA
-
CRL
19h 55m
2 stops
Multiple Airlines Logo
7:30 pm - 4:00 pm
CRL
-
SEA
29h 30m
2 stops
$828Multiple Airlines
Mon, Jun 1 - Wed, Jun 10

Icelandair flights from Seattle to Belgium

Our best Icelandair deals on Seattle to Belgium flight tickets
Icelandair
Apr 24
SEA7:00 pmSeattle/Tacoma Intl
32h 55m
1 stop
BRU12:55 pmBrussels Bruxelles-National
May 7
BRU1:50 pmBrussels Bruxelles-National
13h 05m
1 stop
SEA5:55 pmSeattle/Tacoma Intl
$580
Icelandair
Apr 23
SEA3:40 pmSeattle/Tacoma Intl
12h 15m
1 stop
BRU12:55 pmBrussels Bruxelles-National
Apr 26
BRU1:50 pmBrussels Bruxelles-National
15h 50m
1 stop
SEA8:40 pmSeattle/Tacoma Intl
$605
Icelandair
May 7
SEA7:00 pmSeattle/Tacoma Intl
32h 55m
1 stop
BRU12:55 pmBrussels Bruxelles-National
May 20
BRU1:50 pmBrussels Bruxelles-National
13h 05m
1 stop
SEA5:55 pmSeattle/Tacoma Intl
$610

Lufthansa flights from Seattle to Belgium

Our best Lufthansa deals on Seattle to Belgium flight tickets
Lufthansa
Apr 29
SEA6:50 pmSeattle/Tacoma Intl
13h 25m
1 stop
BRU5:15 pmBrussels Bruxelles-National
May 6
BRU9:30 amBrussels Bruxelles-National
22h 10m
2 stops
SEA10:40 pmSeattle/Tacoma Intl
$689
Lufthansa
Apr 30
SEA7:00 amSeattle/Tacoma Intl
18h 20m
2 stops
BRU10:20 amBrussels Bruxelles-National
May 5
BRU7:00 amBrussels Bruxelles-National
20h 30m
2 stops
SEA6:30 pmSeattle/Tacoma Intl
$698
Lufthansa
Apr 28
SEA2:10 pmSeattle/Tacoma Intl
13h 35m
1 stop
BRU12:45 pmBrussels Bruxelles-National
May 6
BRU8:30 amBrussels Bruxelles-National
12h 50m
1 stop
SEA12:20 pmSeattle/Tacoma Intl
$699

momondo Fare Finder

 
Customize your flight search to find flights from Seattle to Belgium 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 April 2, 2026.
Use the filters below to find and compare flights from Seattle to Belgium that are best for you.

Fly from

Fly to

Route

Depart

Return

Price

Cheapest round-trip

SeattleBrussels

SEA - BRU

SEABRU

Seattle/Tacoma Intl

Fri 4/24

7:00 pm-12:55 pm

1 stop32h 55m

Brussels Bruxelles-National

Thu 5/7

1:50 pm-5:55 pm

1 stop13h 05m

$580
Quickest round-trip

SeattleBrussels

SEA - BRU

SEABRU

Seattle/Tacoma Intl

Thu 4/23

3:40 pm-12:55 pm

1 stop12h 15m

Brussels Bruxelles-National

Sun 4/26

1:50 pm-8:40 pm

1 stop15h 50m

$605

SeattleBrussels

SEA - BRU

SEABRU

Seattle/Tacoma Intl

Thu 5/7

7:00 pm-12:55 pm

1 stop32h 55m

Brussels Bruxelles-National

Wed 5/20

1:50 pm-5:55 pm

1 stop13h 05m

$610

SeattleBrussels

SEA - BRU

SEABRU

Seattle/Tacoma Intl

Mon 5/11

7:00 pm-12:55 pm

1 stop32h 55m

Brussels Bruxelles-National

Wed 5/20

1:50 pm-8:40 pm

1 stop15h 50m

$618

SeattleBrussels

SEA - BRU

SEABRU

Seattle/Tacoma Intl

Wed 4/22

3:40 pm-12:55 pm

1 stop12h 15m

Brussels Bruxelles-National

Thu 5/21

1:50 pm-8:40 pm

1 stop15h 50m

$623

SeattleBrussels

SEA - BRU

SEABRU

Seattle/Tacoma Intl

Tue 4/21

7:00 pm-12:55 pm

1 stop32h 55m

Brussels Bruxelles-National

Tue 5/26

1:50 pm-8:40 pm

1 stop15h 50m

$625

SeattleBrussels

SEA - BRU

SEABRU

Seattle/Tacoma Intl

Sat 4/18

7:00 pm-12:55 pm

1 stop32h 55m

Brussels Bruxelles-National

Sat 5/23

1:50 pm-5:55 pm

1 stop13h 05m

$630

SeattleBrussels

SEA - BRU

SEABRU

Seattle/Tacoma Intl

Sat 4/18

7:00 pm-12:55 pm

1 stop32h 55m

Brussels Bruxelles-National

Sun 5/24

1:50 pm-11:45 am

1 stop30h 55m

$631

SeattleBrussels

SEA - CRL

SEACRL

Seattle/Tacoma Intl

Mon 6/1

3:40 pm-8:35 pm

2 stops19h 55m

Charleroi Brussels

Wed 6/10

9:20 am-10:08 am

3 stops33h 48m

$761

SeattleBrussels

SEA - CRL

SEACRL

Seattle/Tacoma Intl

Mon 6/1

3:40 pm-8:35 pm

2 stops19h 55m

Charleroi Brussels

Wed 6/10

7:30 pm-4:00 pm

2 stops29h 30m

$828

Flights are sorted by cheapest round-trip flights first.

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

See travel insights to Belgium from

How to get the cheapest flight ticket from Seattle to Belgium

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 cheapest month to fly to Belgium?

In general, October is the cheapest month to fly from Seattle to Belgium. Due to it being the ‘off-season’ during this time, you can expect flight prices to be around $463. If you are unable to visit Belgium during the month of October, then departing from Seattle during the month January is also very affordable. Most momondo users find prices during this month for around $510.

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

You are more likely to see cheaper flights to Belgium from Seattle when booking weeks ahead of your departure date. In general, you can expect to find flights to Belgium for around $610 when searching weeks out. However, flight prices might be lower outside of this timeframe. For example, people recently found flights to Belgium from Seattle for as low as $533 on momondo.

Can stopping save me money on Seattle to Belgium flights?

You could potentially save up to 18% on your flight if you consider stops on a Seattle to Belgium flight.

Cheap Seattle to Belgium flight deals and tips

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

Fastest flight time

12h 15m

Direct flights

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

Frequently asked questions about flying from Seattle to Belgium

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

    Prices for flights from Seattle/Tacoma Intl Airport to Belgium are refreshed on a daily basis.

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

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

    Although the minimum age for a child to fly alone is five, airlines that offer an unaccompanied minor (UMNR) service may have their own age limits, which could be impacted by factors such as flight length, timing, and layovers. It is recommended that you verify with the airline you are booking with for travel from Seattle/Tacoma Intl Airport to Belgium.

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

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

Best airlines flying from Seattle to Belgium

Compare and see reviews for airlines that fly from Seattle to Belgium with momondo
Airline
Rating
Free Cancellation
Price
IcelandairPriceFrom $383Free CancellationRating
7.0
630 reviews
Search Icelandair flights
British AirwaysPriceFrom $421Free CancellationRating
6.7
7,841 reviews
Search British Airways flights
United AirlinesPriceFrom $470Free CancellationRating
7.4
9,537 reviews
Search United Airlines flights
KLMPriceFrom $481Free CancellationRating
7.7
1,485 reviews
Search KLM flights
DeltaPriceFrom $482Free CancellationRating
7.9
8,373 reviews
Search Delta flights
Virgin AtlanticPriceFrom $488Free CancellationRating
7.5
685 reviews
Search Virgin Atlantic flights
LufthansaPriceFrom $494Free CancellationRating
6.8
7,885 reviews
Search Lufthansa flights
Air CanadaPriceFrom $518Free CancellationRating
7.1
10,884 reviews
Search Air Canada flights

Why use momondo?

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

We help find the flight that best suits your needs, momondo compares prices from hundreds of airlines and travel agents and helps you filter them to find the best flight from Seattle to Belgium for you.

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

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

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

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 Belgium.

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

Yes momondo offers price alerts on flights to Belgium from Seattle. After performing a search on this page you should be able to see the price alert set up feature. Simply provide a valid email address and momondo will instantly alert you when prices change.

An easier way to manage your Belgium 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
Sat 5/2
Sat 5/9
By creating a price alert you accept our terms of use and privacy policy.

Find better results for your trip to Belgium

Popular cities in Belgium

Popular flights according to clicks in the last 7 days on momondo
Flights to Brusselsfrom $493
Flights to Ostend