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Belgium

$255+ Cheap flights from Seattle (SEA) to Belgium

This is the cheapest one-way flight price found by a Cheapflights user in the last 72 hours by searching for a flight departing on 10/18. Fares are subject to change and may not be available on all flights or dates of travel.
SEA — BRU
Oct 17 — Oct 241
Fri 10/17
Fri 10/24
1 adult, Economy
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Cheap flight deals from Seattle to Belgium

Keep the following information in mind while searching for Seattle to Belgium flight deals. Data was last updated September 17, 2025.

Round-trip from

$400
(oojo)

One-way from

$255
(Kiwi.com)

Popular in

June

Cheapest in

September

Average price

$527
From Seattle/Tacoma Intl to Belgium
Search Deals
One-way flight from Seattle/Tacoma Intl to Belgium
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Highest demand for flights based on searches. 14% potential increase in price ($106 potential increase over avg. RT price).
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Cheapest flight prices on average. 2% potential price decrease ($18 potential savings vs. average RT price).
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Average for round-trip flights in September 2025
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Find flight deals from Seattle to Belgium

Cheapest flights from Seattle to Belgium
Explore the most affordable flight options available from Seattle to Belgium. Find the lowest fares from popular airlines and budget airlines, with prices last updated on September 17, 2025.

This oojo deal was found by Cheapflights users on 9/15. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure oojo is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Sun 10/123:45 pmSEA - BRU
1 stop12h 05mIcelandair
Fri 10/241:50 pmBRU - SEA
1 stop15h 50mIcelandair
Deal found 9/15$400
This United Airlines deal was found by Cheapflights users on 9/15. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure United Airlines is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Wed 11/127:00 amSEA - BRU
1 stop16h 55mUnited Airlines
Tue 11/1810:00 amBRU - SEA
2 stops43h 54mUnited Airlines
Deal found 9/15$435
This oojo deal was found by Cheapflights users on 9/15. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure oojo is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Sun 10/53:45 pmSEA - BRU
1 stop12h 05mIcelandair
Fri 10/101:50 pmBRU - SEA
1 stop15h 50mIcelandair
Deal found 9/15$438
This Trip.com deal was found by Cheapflights users on 9/15. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Trip.com is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Wed 11/52:35 pmSEA - BRU
1 stop12h 20mIcelandair
Sun 11/1612:50 pmBRU - SEA
1 stop13h 10mIcelandair
Deal found 9/15$445
This Flightnetwork deal was found by Cheapflights users on 9/17. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Flightnetwork is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Thu 10/235:30 amSEA - BRU
2 stops17h 35mAir Canada
Thu 11/610:00 amBRU - SEA
2 stops18h 16mAir Canada
Deal found 9/17$456
This KLM deal was found by Cheapflights users on 9/15. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure KLM is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Wed 11/127:20 amSEA - BRU
1 stop16h 40mKLM
Tue 11/1811:00 amBRU - SEA
1 stop20h 25mKLM
Deal found 9/15$457
This United Airlines deal was found by Cheapflights users on 9/15. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure United Airlines is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Sun 10/127:15 amSEA - BRU
1 stop15h 50mUnited Airlines
Fri 10/2410:00 amBRU - SEA
2 stops38h 45mUnited Airlines
Deal found 9/15$460
This United Airlines deal was found by Cheapflights users on 9/16. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure United Airlines is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Sun 10/126:00 amSEA - BRU
1 stop16h 00mUnited Airlines
Wed 10/2210:00 amBRU - SEA
2 stops41h 49mUnited Airlines
Deal found 9/16$465
This United Airlines deal was found by Cheapflights users on 9/15. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure United Airlines is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Tue 10/141:57 pmSEA - BRU
1 stop34h 03mUnited Airlines
Tue 10/2810:00 amBRU - SEA
3 stops40h 52mUnited Airlines
Deal found 9/15$471
This Mytrip deal was found by Cheapflights users on 9/16. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Mytrip is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Wed 10/87:15 amSEA - BRU
1 stop15h 50mMultiple Airlines
Wed 10/159:40 amBRU - SEA
2 stops17h 56mMultiple Airlines
Deal found 9/16$472
This Mytrip deal was found by Cheapflights users on 9/16. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Mytrip is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Sat 10/43:45 pmSEA - CRL
2 stops17h 30mMultiple Airlines
Sun 10/126:40 pmCRL - SEA
2 stops35h 00mMultiple Airlines
Deal found 9/16$727
This Mytrip deal was found by Cheapflights users on 9/16. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Mytrip is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Thu 10/235:30 amSEA - CRL
3 stops32h 05mMultiple Airlines
Thu 11/69:30 amCRL - SEA
3 stops21h 54mMultiple Airlines
Deal found 9/16$801

Cheapflights 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, Cheapflights users made 2,558,603 searches. Data last updated September 17, 2025.
Use the filters below to find and compare flights from Seattle to Belgium that are best for you.

Fly from

Seattle

Fly to

Belgium

Route

Depart

Return

Price

SeattleBrussels

SEA - BRU

SEABRU

Seattle/Tacoma Intl

Sun 10/12

3:45 pm-12:50 pm

1 stop12h 05m

Brussels Bruxelles-National

Fri 10/24

1:50 pm-5:50 pm

1 stop13h 00m

$400

SeattleBrussels

SEA - BRU

SEABRU

Seattle/Tacoma Intl

Thu 1/22

2:35 pm-11:55 am

1 stop12h 20m

Brussels Bruxelles-National

Fri 1/30

12:50 pm-5:00 pm

1 stop13h 10m

$416

SeattleBrussels

SEA - BRU

SEABRU

Seattle/Tacoma Intl

Wed 11/5

7:00 am-8:55 am

1 stop16h 55m

Brussels Bruxelles-National

Tue 11/18

10:00 am-8:54 pm

2 stops43h 54m

$435

SeattleBrussels

SEA - BRU

SEABRU

Seattle/Tacoma Intl

Tue 2/10

10:58 am-8:55 am

1 stop12h 57m

Brussels Bruxelles-National

Tue 3/10

10:00 am-6:59 pm

2 stops40h 59m

$435

SeattleBrussels

SEA - BRU

SEABRU

Seattle/Tacoma Intl

Wed 11/12

7:00 am-8:05 am

2 stops16h 05m

Brussels Bruxelles-National

Tue 11/18

10:00 am-11:28 am

2 stops34h 28m

$439

SeattleBrussels

SEA - BRU

SEABRU

Seattle/Tacoma Intl

Thu 10/23

5:30 am-8:05 am

2 stops17h 35m

Brussels Bruxelles-National

Thu 11/6

10:00 am-7:16 pm

2 stops18h 16m

$456

SeattleBrussels

SEA - BRU

SEABRU

Seattle/Tacoma Intl

Wed 11/12

7:20 am-9:00 am

1 stop16h 40m

Brussels Bruxelles-National

Tue 11/18

11:00 am-10:25 pm

1 stop20h 25m

$457

SeattleBrussels

SEA - BRU

SEABRU

Seattle/Tacoma Intl

Wed 1/21

7:00 am-8:55 am

1 stop16h 55m

Brussels Bruxelles-National

Tue 1/27

11:55 am-8:37 pm

1 stop17h 42m

$457

SeattleBrussels

SEA - CRL

SEACRL

Seattle/Tacoma Intl

Thu 10/23

8:40 am-10:35 pm

2 stops28h 55m

Charleroi Brussels

Thu 11/6

9:30 am-10:24 pm

3 stops21h 54m

$659

SeattleBrussels

SEA - CRL

SEACRL

Seattle/Tacoma Intl

Sat 10/4

3:45 pm-6:15 pm

2 stops17h 30m

Charleroi Brussels

Sun 10/12

6:40 pm-8:40 pm

2 stops35h 00m

$727

Flights are sorted by cheapest round-trip flights first.

Deals found on 9/16

Showing 1-10 of 24 results
1
2
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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
Rates are based on past data. Find the cheapest month and day to book your flight based on your travel requirements, then search for cheap deals.

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, November is the cheapest month in which you can book a flight from Seattle to Belgium (average of $614). Flying from Seattle to Belgium in June is currently the most expensive (average of $1,077). 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.

What is the cheapest time of day to fly from SEA to BE?

Find hourly flight availability from Seattle to Belgium. Discover flight options and departure times throughout the day, allowing you to choose a departure time that suits your schedule. Data last updated September 17, 2025.

Regardless of the time of day you decide to fly, the ticket price will remain around the same. Book flights from Seattle to Belgium as you normally would.

Reviews of airlines servicing Belgium

Get insights into the airlines that provide service to Belgium. Read reviews, discover amenities, and learn about the overall travel experience offered by airlines. Use this information to make informed decisions when choosing an airline for your flight to Belgium. Reviews last updated September 17, 2025.
Peruse reviews from past customers who have flown with KLM, United Airlines, and Icelandair 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.
KLM
7.8
Good
1,386 reviews

Entertainment

7.2

Comfort

7.7

Overall

7.8

Crew

8.4

Boarding

7.8

Food

7.3

Reviews

1 / 20
4.0
Okay

Mark,Sep 2025

AMS - BHX

Crew and snacks were good, boarding wasn't great as busses were used rather than boarding tunnels. Also endured a one hour delay.
KLM
7.8
Good
1,386 reviews
KLM
7.8
Good
1,386 reviews

Entertainment

7.2

Comfort

7.7

Overall

7.8

Crew

8.4

Boarding

7.8

Food

7.3

Reviews

1 / 20
4.0
Okay

Mark,Sep 2025

AMS - BHX

Crew and snacks were good, boarding wasn't great as busses were used rather than boarding tunnels. Also endured a one hour delay.
United Airlines
7.4
Good
8,926 reviews
KLM
7.8
Good
1,386 reviews

Entertainment

7.2

Comfort

7.7

Overall

7.8

Crew

8.4

Boarding

7.8

Food

7.3

Reviews

1 / 20
4.0
Okay

Mark,Sep 2025

AMS - BHX

Crew and snacks were good, boarding wasn't great as busses were used rather than boarding tunnels. Also endured a one hour delay.
Icelandair
7.0
Good
545 reviews
KLM
7.8
Good
1,386 reviews

Entertainment

7.2

Comfort

7.7

Overall

7.8

Crew

8.4

Boarding

7.8

Food

7.3

Reviews

1 / 20
4.0
Okay

Mark,Sep 2025

AMS - BHX

Crew and snacks were good, boarding wasn't great as busses were used rather than boarding tunnels. Also endured a one hour delay.
Lufthansa
6.8
Okay
7,409 reviews
KLM
7.8
Good
1,386 reviews

Entertainment

7.2

Comfort

7.7

Overall

7.8

Crew

8.4

Boarding

7.8

Food

7.3

Reviews

1 / 20
4.0
Okay

Mark,Sep 2025

AMS - BHX

Crew and snacks were good, boarding wasn't great as busses were used rather than boarding tunnels. Also endured a one hour delay.
British Airways
6.7
Okay
7,367 reviews
KLM
7.8
Good
1,386 reviews

Entertainment

7.2

Comfort

7.7

Overall

7.8

Crew

8.4

Boarding

7.8

Food

7.3

Reviews

1 / 20
4.0
Okay

Mark,Sep 2025

AMS - BHX

Crew and snacks were good, boarding wasn't great as busses were used rather than boarding tunnels. Also endured a one hour delay.

Related info for your journey

Find useful and relevant information for your journey from Seattle to Belgium. Access travel guides, tips, and recommendations to enhance your travel experience. Get information about local attractions, weather, transportation options, and more.

  • 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 05m. Icelandair provides one of the quickest options available for as low as $400. Airlines will cover a distance of 4941 mi. Both multi-stop and nonstop flights can be found to your destination and back.

  • 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, November is the cheapest month in which you can book a flight from Seattle to Belgium (average of $614). Flying from Seattle to Belgium in June is currently the most expensive (average of $1,077). 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

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Top 10 airlines flying from Seattle to Belgium

Discover the top 10 airlines that operate flights from Seattle to Belgium. Compare their services, reliability, and customer satisfaction ratings to choose the airline that best suits your travel preferences and needs. Over the last 7 days, Cheapflights users made 2,558,603 searches. Data last updated September 17, 2025.
AirlineCheapestAverageFlexibilityOn-time
IcelandairCheapest$391Average$497FlexibilityNo cancel feeOn-time76%
United AirlinesCheapest$483Average$725FlexibilityNo cancel feeOn-time69%
Virgin AtlanticCheapest$488Average$491FlexibilityNo cancel feeOn-time72%
British AirwaysCheapest$502Average$714FlexibilityNo cancel feeOn-time70%
Air FranceCheapest$506Average$607FlexibilityNo cancel feeOn-time77%
KLMCheapest$511Average$702FlexibilityNo cancel feeOn-time75%
DeltaCheapest$514Average$722FlexibilityNo cancel feeOn-timeN/A
Aer LingusCheapest$532Average$556FlexibilityNo cancel feeOn-timeN/A
Air CanadaCheapest$543Average$740FlexibilityNo cancel feeOn-time67%
LufthansaCheapest$561Average$733FlexibilityNo cancel feeOn-time76%

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