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Cheap flights from Seattle to Belgium from $375

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 8/17. 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

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Find the cheapest flights from Seattle to Belgium

Cheap round-trip flights

Icelandair Logo
3:45 pm - 12:50 pmSEA-BRU
12h 05m1 stop
Icelandair Logo
1:50 pm - 5:50 pmBRU-SEA
13h 00m1 stop
$404Icelandair
Find Deal
lun., ago. 18 - mar., ago. 26
Icelandair Logo
7:00 pm - 12:50 pmSEA-BRU
32h 50m1 stop
Icelandair Logo
1:50 pm - 5:50 pmBRU-SEA
13h 00m1 stop
$406Icelandair
Find Deal
jue., ago. 14 - mié., ago. 20
Logo
7:20 am - 8:00 amSEA-BRU
15h 40m1 stop
Logo
10:00 am - 10:16 pmBRU-SEA
45h 16m2 stops
$428
Find Deal
lun., ago. 18 - mar., ago. 26
United Airlines Logo
7:20 am - 8:00 amSEA-BRU
15h 40m1 stop
United Airlines Logo
10:00 am - 8:45 pmBRU-SEA
19h 45m1 stop
$442United Airlines
Find Deal
mar., ago. 12 - jue., ago. 21
Air Canada Logo
12:05 pm - 8:00 amSEA-BRU
34h 55m2 stops
Air Canada Logo
10:00 am - 8:45 pmBRU-SEA
19h 45m1 stop
$449Air Canada
Find Deal
dom., ago. 17 - mar., ago. 26
Air Canada Logo
7:20 am - 9:45 amSEA-BRU
17h 25m2 stops
Air Canada Logo
10:00 am - 8:45 pmBRU-SEA
19h 45m1 stop
$462Air Canada
Find Deal
mar., ago. 12 - jue., ago. 21
United Airlines Logo
8:00 am - 7:15 amSEA-BRU
14h 15m1 stop
United Airlines Logo
10:00 am - 8:42 pmBRU-SEA
43h 42m2 stops
$464United Airlines
Find Deal
mié., sep. 10 - jue., sep. 18
Logo
12:00 pm - 1:15 pmSEA-BRU
16h 15m2 stops
Logo
10:00 am - 10:16 pmBRU-SEA
21h 16m2 stops
$469
Find Deal
mié., sep. 10 - jue., sep. 18
Delta Logo
6:00 am - 8:40 amSEA-BRU
17h 40m1 stop
Delta Logo
8:00 am - 4:51 pmBRU-SEA
17h 51m2 stops
$488Delta
Find Deal
mar., ago. 12 - jue., ago. 21
Delta Logo
7:20 am - 8:40 amSEA-BRU
16h 20m1 stop
Delta Logo
10:25 am - 10:25 pmBRU-SEA
21h 00m2 stops
$489Delta
Find Deal
mar., ago. 12 - jue., ago. 21

Virgin Atlantic flights from Seattle to Belgium

Our best Virgin Atlantic deals on Seattle to Belgium flight tickets
Virgin Atlantic
Aug 12
SEA7:20 amSeattle/Tacoma Intl
16h 20m
1 stop
BRU8:40 amBrussels Bruxelles-National
Aug 21
BRU10:45 amBrussels Bruxelles-National
18h 29m
1 stop
SEA8:14 pmSeattle/Tacoma Intl
$458
Find similar
Virgin Atlantic
Aug 7
SEA9:45 pmSeattle/Tacoma Intl
25h 55m
1 stop
BRU8:40 amBrussels Bruxelles-National
Aug 21
BRU10:45 amBrussels Bruxelles-National
21h 30m
1 stop
SEA11:15 pmSeattle/Tacoma Intl
$475
Find similar
Virgin Atlantic
Aug 15
SEA5:30 amSeattle/Tacoma Intl
18h 10m
2 stops
BRU8:40 amBrussels Bruxelles-National
Aug 19
BRU10:45 amBrussels Bruxelles-National
18h 29m
1 stop
SEA8:14 pmSeattle/Tacoma Intl
$545
Find similar

Icelandair flights from Seattle to Belgium

Our best Icelandair deals on Seattle to Belgium flight tickets
Icelandair
Aug 18
SEA3:45 pmSeattle/Tacoma Intl
12h 05m
1 stop
BRU12:50 pmBrussels Bruxelles-National
Aug 26
BRU1:50 pmBrussels Bruxelles-National
13h 00m
1 stop
SEA5:50 pmSeattle/Tacoma Intl
$404
Find similar
Icelandair
Aug 14
SEA7:00 pmSeattle/Tacoma Intl
32h 50m
1 stop
BRU12:50 pmBrussels Bruxelles-National
Aug 20
BRU1:50 pmBrussels Bruxelles-National
13h 00m
1 stop
SEA5:50 pmSeattle/Tacoma Intl
$406
Find similar
Icelandair
Aug 17
SEA11:30 pmSeattle/Tacoma Intl
28h 20m
1 stop
BRU12:50 pmBrussels Bruxelles-National
Aug 26
BRU1:50 pmBrussels Bruxelles-National
15h 50m
1 stop
SEA8:40 pmSeattle/Tacoma Intl
$408
Find similar

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 agosto 2, 2025.
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

SeattleBrussels

SEA - BRU

SEABRU

Seattle/Tacoma Intl

lun. 8/18

3:45 pm-12:50 pm

1 stop12h 05m

Brussels Bruxelles-National

mar. 8/26

1:50 pm-5:50 pm

1 stop13h 00m

$404

SeattleBrussels

SEA - BRU

SEABRU

Seattle/Tacoma Intl

jue. 8/14

7:00 pm-12:50 pm

1 stop32h 50m

Brussels Bruxelles-National

mié. 8/20

1:50 pm-5:50 pm

1 stop13h 00m

$406

SeattleBrussels

SEA - BRU

SEABRU

Seattle/Tacoma Intl

lun. 8/18

7:20 am-8:00 am

1 stop15h 40m

Brussels Bruxelles-National

mar. 8/26

10:00 am-10:16 pm

2 stops45h 16m

$428

SeattleBrussels

SEA - BRU

SEABRU

Seattle/Tacoma Intl

mar. 8/12

7:20 am-8:00 am

1 stop15h 40m

Brussels Bruxelles-National

jue. 8/21

10:00 am-8:45 pm

1 stop19h 45m

$442

SeattleBrussels

SEA - BRU

SEABRU

Seattle/Tacoma Intl

dom. 8/17

12:05 pm-8:00 am

2 stops34h 55m

Brussels Bruxelles-National

mar. 8/26

10:00 am-8:45 pm

1 stop19h 45m

$449

SeattleBrussels

SEA - BRU

SEABRU

Seattle/Tacoma Intl

mar. 8/12

7:20 am-9:45 am

2 stops17h 25m

Brussels Bruxelles-National

jue. 8/21

10:00 am-8:45 pm

1 stop19h 45m

$462

SeattleBrussels

SEA - BRU

SEABRU

Seattle/Tacoma Intl

mié. 9/10

8:00 am-7:15 am

1 stop14h 15m

Brussels Bruxelles-National

jue. 9/18

10:00 am-8:42 pm

2 stops43h 42m

$464

SeattleBrussels

SEA - BRU

SEABRU

Seattle/Tacoma Intl

mié. 9/10

12:00 pm-1:15 pm

2 stops16h 15m

Brussels Bruxelles-National

jue. 9/18

10:00 am-10:16 pm

2 stops21h 16m

$469

SeattleBrussels

SEA - BRU

SEABRU

Seattle/Tacoma Intl

mar. 8/12

6:00 am-8:40 am

1 stop17h 40m

Brussels Bruxelles-National

jue. 8/21

8:00 am-4:51 pm

2 stops17h 51m

$488

SeattleBrussels

SEA - BRU

SEABRU

Seattle/Tacoma Intl

mar. 8/12

7:20 am-8:40 am

1 stop16h 20m

Brussels Bruxelles-National

jue. 8/21

10:25 am-10:25 pm

2 stops21h 00m

$489

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 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, September 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 $532. If you are unable to visit Belgium during the month of September, then departing from Seattle during the month November is also very affordable. Most momondo users find prices during this month for around $532.

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

Our data shows that Tuesday is the least expensive day to fly to Belgium. Tickets to fly out on this day can be as low as $626. If your travel schedule is flexible, try to avoid departing on a Wednesday because tickets tend to average around $783. These prices are subject to change though, so be sure to set up a Price Alert for flights to Belgium.

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

Our most recent data shows that the best time of day to fly to Belgium is in the morning. Flights from Seattle to Belgium during this time can be as low as $668. Flights to Belgium are more costly at noon, with an average ticket price of $738. Departure times at noon fall within the peak daily travel times, which is why tickets can be more expensive.

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 $623 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 $517 on momondo.

Cheap Seattle to Belgium flight deals and tips

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

Best Price Found

$375

Fastest flight time

12h 05m

Direct flights

None

Airports in Belgium

2 airports
The best one-way flight to Belgium from Seattle in the past 72 hours is $375. The best round-trip flight deal from Seattle to Belgium found on momondo in the last 72 hours is $404.
The fastest flight from Seattle to Belgium takes 12h 05m
There are no direct flights from Seattle to Belgium. Popular non-direct routes for this connection are Seattle/Tacoma Intl Airport - Brussels Bruxelles-National Airport and Seattle/Tacoma Intl Airport - Charleroi Brussels Airport.
There are 2 airports near Belgium: Brussels Bruxelles-National (BRU), Charleroi Brussels (CRL)
Search flight deals

  • 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 $389Free CancellationRating
7.0
520 reviews
Search Icelandair flights
American AirlinesPriceFrom $501Free CancellationRating
7.2
10,000 reviews
Search American Airlines flights
British AirwaysPriceFrom $502Free CancellationRating
6.6
7,224 reviews
Search British Airways flights
KLMPriceFrom $511Free CancellationRating
7.8
1,384 reviews
Search KLM flights
DeltaPriceFrom $514Free CancellationRating
8.0
7,983 reviews
Search Delta flights
United AirlinesPriceFrom $522Free CancellationRating
7.4
8,904 reviews
Search United Airlines flights
Aer LingusPriceFrom $532Free CancellationRating
7.1
1,193 reviews
Search Aer Lingus flights
Air CanadaPriceFrom $543Free CancellationRating
7.1
9,855 reviews
Search Air Canada flights
Air FrancePriceFrom $547Free CancellationRating
7.5
1,465 reviews
Search Air France flights
LufthansaPriceFrom $570Free CancellationRating
6.8
7,276 reviews
Search Lufthansa 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

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