Belgium

$274+ Cheap flights from Seattle (SEA) to Belgium

SEA — BRU
Dec 4 — Dec 111
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Cheap flight deals from Seattle to Belgium

Cheapest flights from Seattle to Belgium

Mon 11/232:35 pm -
1 stop12h 20m
Tue 12/812:50 pm -
1 stop13h 10m
Deal found 11/2$569
Mon 11/232:35 pm -
2 stops19h 05m
Tue 12/86:15 am -
3 stops19h 45m
Deal found 11/2$657
Wed 12/22:50 pm -
2 stops18h 50m
Sun 12/67:45 pm -
3 stops34h 14m
Deal found 10/31$709
Thu 11/121:50 pm -
3 stops24h 20m
Wed 11/188:45 pm -
3 stops34h 12m
Deal found 10/31$717
Mon 12/77:45 am -
3 stops25h 55m
Tue 12/2210:20 am -
3 stops35h 40m
Deal found 11/1$773
Sun 11/81:50 pm -
3 stops36h 00m
Wed 11/117:20 pm -
3 stops35h 37m
Deal found 11/3$782
Sun 12/68:40 am -
2 stops39h 10m
Tue 12/1510:00 am -
2 stops32h 32m
Deal found 11/2$795

Find flight deals from Seattle to Belgium

Round-trip from

$569
(Gotogate)

One-way from

$274
(oojo)

Popular in

June

Cheapest in

February

Average price

$699
From Seattle/Tacoma Intl to Belgium
One-way flight from Seattle/Tacoma Intl to Belgium
Highest demand for flights based on searches. 16% potential increase in price ($150 potential increase over avg. RT price).
Cheapest flight prices on average. 6% potential price decrease ($46 potential savings vs. average RT price).
Average for round-trip flights in November 2026

Cheapflights Fare Finder

 
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 Seattle/Tacoma Intl - BRU Brussels Bruxelles-National

SEABRU

Seattle/Tacoma Intl

Tue 4/6

8:20 pm-3:05 pm

1 stop33h 45m

Brussels Bruxelles-National

Wed 12/31

12:00 am-3:00 pm

Nonstop0h 00m

$338

SeattleBrussels

SEA Seattle/Tacoma Intl - BRU Brussels Bruxelles-National

SEABRU

Seattle/Tacoma Intl

Tue 4/6

11:00 am-1:15 pm

2 stops17h 15m

Brussels Bruxelles-National

Wed 12/31

12:00 am-3:00 pm

Nonstop0h 00m

$339

SeattleBrussels

SEA Seattle/Tacoma Intl - BRU Brussels Bruxelles-National

SEABRU

Seattle/Tacoma Intl

Tue 11/24

2:35 pm-6:40 pm

2 stops19h 05m

Brussels Bruxelles-National

Wed 12/31

12:00 am-3:00 pm

Nonstop0h 00m

$348

SeattleBrussels

SEA Seattle/Tacoma Intl - BRU Brussels Bruxelles-National

SEABRU

Seattle/Tacoma Intl

Sat 4/3

7:05 pm-7:10 am

2 stops27h 05m

Brussels Bruxelles-National

Wed 12/31

12:00 am-3:00 pm

Nonstop0h 00m

$379

SeattleBrussels

SEA Seattle/Tacoma Intl - BRU Brussels Bruxelles-National

SEABRU

Seattle/Tacoma Intl

Sun 11/29

2:35 pm-9:15 am

3 stops33h 40m

Brussels Bruxelles-National

Wed 12/31

12:00 am-3:00 pm

Nonstop0h 00m

$382

SeattleBrussels

SEA Seattle/Tacoma Intl - BRU Brussels Bruxelles-National

SEABRU

Seattle/Tacoma Intl

Wed 12/9

2:35 pm-6:40 pm

2 stops19h 05m

Brussels Bruxelles-National

Wed 12/31

12:00 am-3:00 pm

Nonstop0h 00m

$385

SeattleBrussels

SEA Seattle/Tacoma Intl - BRU Brussels Bruxelles-National

SEABRU

Seattle/Tacoma Intl

Fri 11/27

2:35 pm-8:40 am

3 stops33h 05m

Brussels Bruxelles-National

Wed 12/31

12:00 am-3:00 pm

Nonstop0h 00m

$408

SeattleBrussels

SEA Seattle/Tacoma Intl - BRU Brussels Bruxelles-National

SEABRU

Seattle/Tacoma Intl

Thu 11/26

2:35 pm-6:40 pm

2 stops19h 05m

Brussels Bruxelles-National

Wed 12/31

12:00 am-3:00 pm

Nonstop0h 00m

$413
Quickest round-trip

SeattleBrussels

SEA Seattle/Tacoma Intl - BRU Brussels Bruxelles-National

SEABRU

Seattle/Tacoma Intl

Fri 3/19

3:50 pm-4:15 pm

1 stop16h 25m

Brussels Bruxelles-National

Wed 12/31

12:00 am-3:00 pm

Nonstop0h 00m

$429

SeattleBrussels

SEA Seattle/Tacoma Intl - BRU Brussels Bruxelles-National

SEABRU

Seattle/Tacoma Intl

Sun 4/18

10:10 am-8:55 am

2 stops37h 45m

Brussels Bruxelles-National

Thu 4/22

9:55 am-8:48 pm

1 stop19h 53m

$749

Flights are sorted by cheapest round-trip flights first.

Deals found on 11/2

Showing 1-10 of 19 resultsSorted by cheapest first
1
2

Best time to book a flight from Seattle to Belgium

Have a flexible travel schedule? Discover the best time to fly to Belgium from Seattle with our price prediction graph.
Estimated round-trip price

Cheapflights Insights

Everything you need to know about your flight from Seattle to Belgium

What is the cheapest month to book a flight from Seattle to Belgium?

Currently, February is the cheapest month in which you can book a flight from Seattle to Belgium (average of $510). Flying from Seattle to Belgium in June is currently the most expensive (average of $1,284). There are several factors that can impact the price of a flight, so comparing airlines, departure airports and flight times can provide users with more options.

How far ahead should I book a flight from Seattle to Belgium?

Booking 82 days in advance of your planned departure date is, on average, the best time to get cheap flights from Seattle to Belgium. The general trend is that the closer you book to the departure date, the more expensive your flight will be.

Reviews of airlines servicing Belgium

Peruse reviews from past customers who have flown with KLM,Delta, andUnited Airlines from Seattle to Belgium to help guide your decision. You can also see how each airline stacks up in terms of entertainment options, comfort, food, crew/service, and boarding process.

Entertainment

7.2

Overall

7.8

Comfort

7.7

Boarding

7.8

Crew

8.4

Food

7.4

Reviews

1 / 20
4.0
Okay

Abhisek,Aug 2026

JFK - AMS

They didn’t offer any options for breakfast and had only one option which was cold meat and cheese. I would expect at least one more option in premium economy

Entertainment

7.2

Overall

7.8

Comfort

7.7

Boarding

7.8

Crew

8.4

Food

7.4

Reviews

1 / 20
4.0
Okay

Abhisek,Aug 2026

JFK - AMS

They didn’t offer any options for breakfast and had only one option which was cold meat and cheese. I would expect at least one more option in premium economy

Entertainment

7.2

Overall

7.8

Comfort

7.7

Boarding

7.8

Crew

8.4

Food

7.4

Reviews

1 / 20
4.0
Okay

Abhisek,Aug 2026

JFK - AMS

They didn’t offer any options for breakfast and had only one option which was cold meat and cheese. I would expect at least one more option in premium economy

Entertainment

7.2

Overall

7.8

Comfort

7.7

Boarding

7.8

Crew

8.4

Food

7.4

Reviews

1 / 20
4.0
Okay

Abhisek,Aug 2026

JFK - AMS

They didn’t offer any options for breakfast and had only one option which was cold meat and cheese. I would expect at least one more option in premium economy

Entertainment

7.2

Overall

7.8

Comfort

7.7

Boarding

7.8

Crew

8.4

Food

7.4

Reviews

1 / 20
4.0
Okay

Abhisek,Aug 2026

JFK - AMS

They didn’t offer any options for breakfast and had only one option which was cold meat and cheese. I would expect at least one more option in premium economy

Entertainment

7.2

Overall

7.8

Comfort

7.7

Boarding

7.8

Crew

8.4

Food

7.4

Reviews

1 / 20
4.0
Okay

Abhisek,Aug 2026

JFK - AMS

They didn’t offer any options for breakfast and had only one option which was cold meat and cheese. I would expect at least one more option in premium economy

Related info for your journey

  • What airport do you fly from for flights from Seattle to Belgium?

    Seattle/Tacoma Intl (SEA), located 11.4 mi from the city center, is the airport you fly out of when you book flights from Seattle to Belgium.

  • How long is the flight from Seattle to Belgium?

    A quick flight from Seattle to Belgium can take about 12h 20m. Icelandair provides one of the quickest options available for as low as $569. Airlines will cover a distance of 4941 mi.

  • What are the cheapest airlines to fly from Seattle to Belgium one-way?

    The cheapest airline one-way is Icelandair, with whom users have recently found tickets for as low as $237. However, be on the lookout for offers from United Airlines and KLM, as they are both options that can get you from Seattle to Belgium for a low price.

  • Can I find deals for flights from Seattle to Belgium that include hotel bookings?

    Yes. In addition to deals on Seattle to Belgium flights, Cheapflights offers vacation packages that include both flights and hotel.

  • How can I find direct flights from Seattle to Belgium?

    After entering your origin and destination, apply the non-stop filter on the search result page to find direct flights from Seattle to Belgium.

  • Can I find deals for business class flights from Seattle to Belgium?

    Yes. Cheapflights offers flight deals from Seattle to Belgium by cabin class. In addition to browsing deals, you can also filter by cabin class on the search results page after making a search.

  • What is the cheapest month to book a flight from Seattle to Belgium?

    Currently, February is the cheapest month in which you can book a flight from Seattle to Belgium (average of $510). Flying from Seattle to Belgium in June is currently the most expensive (average of $1,284). There are several factors that can impact the price of a flight, so comparing airlines, departure airports and flight times can provide users with more options.

See more FAQs

Browse thousands of different options on Cheapflights for your next trip

Top 7 airlines flying from Seattle to Belgium

AirlineCheapestAverageFlexibilityOn-time
IcelandairCheapest$396Average$583FlexibilityNo cancel feeOn-time76%
British AirwaysCheapest$421Average$689FlexibilityNo cancel feeOn-time70%
KLMCheapest$481Average$680FlexibilityNo cancel feeOn-time75%
LufthansaCheapest$496Average$783FlexibilityNo cancel feeOn-time76%
DeltaCheapest$509Average$759FlexibilityNo cancel feeOn-timeN/A
United AirlinesCheapest$522Average$850FlexibilityNo cancel feeOn-time69%
Turkish AirlinesCheapest$638Average$772FlexibilityNo cancel feeOn-time77%

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