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$225+ 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 5/17. Fares are subject to change and may not be available on all flights or dates of travel.
SEA — BRU
Feb 7 — Feb 141
Sat 2/7
Sat 2/14
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 January 8, 2026.

Round-trip from

$389
(Mytrip)

One-way from

$225
(Delta)

Popular in

December

Cheapest in

January

Average price

$463
From Seattle/Tacoma Intl to Belgium
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One-way flight from Seattle/Tacoma Intl to Belgium
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High demand for flights, 0% potential price rise
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Cheapest flight prices on average. 3% potential price decrease ($21 potential savings vs. average RT price).
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Average for round-trip flights in January 2026
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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 January 8, 2026.

This Mytrip deal was found by Cheapflights users on 1/8. 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 2/42:35 pmSEA - BRU
1 stop12h 20mIcelandair
Thu 2/1212:50 pmBRU - SEA
1 stop13h 10mIcelandair
Deal found 1/8$389
This oojo deal was found by Cheapflights users on 1/7. 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.
Thu 1/222:35 pmSEA - BRU
1 stop12h 20mIcelandair
Thu 2/512:50 pmBRU - SEA
1 stop13h 10mIcelandair
Deal found 1/7$390
This oojo deal was found by Cheapflights users on 1/7. 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.
Fri 5/17:00 pmSEA - BRU
1 stop32h 55mIcelandair
Sun 5/101:50 pmBRU - SEA
1 stop15h 50mIcelandair
Deal found 1/7$409
This Mytrip deal was found by Cheapflights users on 1/7. 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.
Sun 2/89:55 amSEA - BRU
2 stops36h 55mAir Canada
Tue 2/2410:00 amBRU - SEA
2 stops21h 51mAir Canada
Deal found 1/7$422
This United Airlines deal was found by Cheapflights users on 1/7. 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 2/1010:58 amSEA - BRU
1 stop12h 57mUnited Airlines
Tue 3/1010:00 amBRU - SEA
2 stops41h 03mUnited Airlines
Deal found 1/7$438
This Cheapflightsfares deal was found by Cheapflights users on 1/7. 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 Cheapflightsfares is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Tue 2/107:00 amSEA - BRU
1 stop16h 55mLufthansa
Tue 3/1010:10 amBRU - SEA
1 stop16h 53mLufthansa
Deal found 1/7$443
This Mytrip deal was found by Cheapflights users on 1/8. 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.
Sun 2/229:55 amSEA - BRU
2 stops36h 55mAir Canada
Sun 3/110:00 amBRU - SEA
2 stops38h 01mAir Canada
Deal found 1/8$445
This Flighttix deal was found by Cheapflights users on 1/7. 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 Flighttix is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Wed 2/45:50 amSEA - BRU
2 stops17h 00mMultiple Airlines
Wed 2/1110:10 amBRU - SEA
1 stop17h 04mMultiple Airlines
Deal found 1/7$446
This United Airlines deal was found by Cheapflights users on 1/7. 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 2/812:57 pmSEA - BRU
2 stops34h 58mUnited Airlines
Tue 2/2411:15 amBRU - SEA
1 stop32h 59mUnited Airlines
Deal found 1/7$450
This Air Canada deal was found by Cheapflights users on 1/7. 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 Air Canada is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Tue 2/108:00 pmSEA - BRU
2 stops26h 50mAir Canada
Tue 3/1010:00 amBRU - SEA
2 stops31h 31mAir Canada
Deal found 1/7$451
This oojo deal was found by Cheapflights users on 1/8. 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.
Wed 2/45:45 pmSEA - BRU
2 stops16h 50mBritish Airways
Thu 2/123:00 pmBRU - SEA
1 stop29h 30mBritish Airways
Deal found 1/8$452
This Mytrip deal was found by Cheapflights users on 1/7. 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 2/212:00 pmSEA - CRL
2 stops23h 45mMultiple Airlines
Sat 2/285:15 pmCRL - SEA
2 stops29h 05mMultiple Airlines
Deal found 1/7$724

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 January 8, 2026.
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 2/8

9:55 am-7:50 am

2 stops36h 55m

Brussels Bruxelles-National

Tue 2/24

10:00 am-10:51 pm

2 stops21h 51m

$422

SeattleBrussels

SEA - BRU

SEABRU

Seattle/Tacoma Intl

Tue 2/10

7:00 am-8:55 am

1 stop16h 55m

Brussels Bruxelles-National

Tue 3/10

10:00 am-11:49 am

2 stops33h 49m

$439

SeattleBrussels

SEA - BRU

SEABRU

Seattle/Tacoma Intl

Sun 2/8

7:00 am-8:05 am

1 stop16h 05m

Brussels Bruxelles-National

Tue 2/24

11:15 am-11:51 pm

1 stop21h 36m

$450

SeattleBrussels

SEA - BRU

SEABRU

Seattle/Tacoma Intl

Wed 2/4

7:00 am-8:55 am

1 stop16h 55m

Brussels Bruxelles-National

Wed 2/11

11:55 am-8:57 pm

1 stop18h 02m

$459

SeattleBrussels

SEA - BRU

SEABRU

Seattle/Tacoma Intl

Fri 3/13

9:20 am-1:15 pm

2 stops19h 55m

Brussels Bruxelles-National

Mon 3/23

10:00 am-8:56 pm

2 stops42h 56m

$485

SeattleBrussels

SEA - BRU

SEABRU

Seattle/Tacoma Intl

Thu 3/12

8:10 am-1:15 pm

2 stops21h 05m

Brussels Bruxelles-National

Mon 3/16

7:00 am-1:10 pm

1 stop14h 10m

$487

SeattleBrussels

SEA - BRU

SEABRU

Seattle/Tacoma Intl

Thu 1/22

2:00 pm-1:35 pm

1 stop14h 35m

Brussels Bruxelles-National

Thu 2/5

10:00 am-7:16 pm

2 stops18h 16m

$487

SeattleBrussels

SEA - BRU

SEABRU

Seattle/Tacoma Intl

Fri 1/23

10:58 am-8:55 am

1 stop12h 57m

Brussels Bruxelles-National

Tue 1/27

10:00 am-4:01 pm

2 stops39h 01m

$489

SeattleBrussels

SEA - BRU

SEABRU

Seattle/Tacoma Intl

Thu 1/22

7:00 am-8:55 am

1 stop16h 55m

Brussels Bruxelles-National

Thu 2/5

11:55 am-10:43 pm

2 stops19h 48m

$499

SeattleBrussels

SEA - BRU

SEABRU

Seattle/Tacoma Intl

Mon 1/19

3:10 pm-10:20 pm

1 stop22h 10m

Brussels Bruxelles-National

Mon 1/26

2:45 pm-11:50 am

1 stop30h 05m

$508

Flights are sorted by cheapest round-trip flights first.

Deals found on 1/7

Showing 1-10 of 36 results
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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, January is the cheapest month in which you can book a flight from Seattle to Belgium (average of $378). Flying from Seattle to Belgium in July is currently the most expensive (average of $505). 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.

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 January 8, 2026.
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
7.7
Good
1,434 reviews

Comfort

7.6

Overall

7.7

Boarding

7.8

Food

7.2

Crew

8.4

Entertainment

7.1

Reviews

1 / 20
8.0
Excellent

Anonymous,Dec 2025

YYC - AMS

Not literally sitting in the very last row in the middle
KLM
7.7
Good
1,434 reviews
KLM
7.7
Good
1,434 reviews

Comfort

7.6

Overall

7.7

Boarding

7.8

Food

7.2

Crew

8.4

Entertainment

7.1

Reviews

1 / 20
8.0
Excellent

Anonymous,Dec 2025

YYC - AMS

Not literally sitting in the very last row in the middle
United Airlines
7.4
Good
9,139 reviews
KLM
7.7
Good
1,434 reviews

Comfort

7.6

Overall

7.7

Boarding

7.8

Food

7.2

Crew

8.4

Entertainment

7.1

Reviews

1 / 20
8.0
Excellent

Anonymous,Dec 2025

YYC - AMS

Not literally sitting in the very last row in the middle
Icelandair
7.1
Good
593 reviews
KLM
7.7
Good
1,434 reviews

Comfort

7.6

Overall

7.7

Boarding

7.8

Food

7.2

Crew

8.4

Entertainment

7.1

Reviews

1 / 20
8.0
Excellent

Anonymous,Dec 2025

YYC - AMS

Not literally sitting in the very last row in the middle
Lufthansa
6.8
Okay
7,694 reviews
KLM
7.7
Good
1,434 reviews

Comfort

7.6

Overall

7.7

Boarding

7.8

Food

7.2

Crew

8.4

Entertainment

7.1

Reviews

1 / 20
8.0
Excellent

Anonymous,Dec 2025

YYC - AMS

Not literally sitting in the very last row in the middle
British Airways
6.7
Okay
7,657 reviews
KLM
7.7
Good
1,434 reviews

Comfort

7.6

Overall

7.7

Boarding

7.8

Food

7.2

Crew

8.4

Entertainment

7.1

Reviews

1 / 20
8.0
Excellent

Anonymous,Dec 2025

YYC - AMS

Not literally sitting in the very last row in the middle

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 16h 55m. Air Canada provides one of the quickest options available for as low as $439. Airlines will cover a distance of 4941 mi. Both multi-stop and nonstop flights can be found to your destination and back.

  • 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 $175. 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, January is the cheapest month in which you can book a flight from Seattle to Belgium (average of $378). Flying from Seattle to Belgium in July is currently the most expensive (average of $505). 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 January 8, 2026.
AirlineCheapestAverageFlexibilityOn-time
IcelandairCheapest$386Average$490FlexibilityNo cancel feeOn-time76%
DeltaCheapest$482Average$705FlexibilityNo cancel feeOn-timeN/A
United AirlinesCheapest$483Average$730FlexibilityNo cancel feeOn-time69%
British AirwaysCheapest$485Average$748FlexibilityNo cancel feeOn-time70%
Virgin AtlanticCheapest$488Average$491FlexibilityNo cancel feeOn-time72%
LufthansaCheapest$501Average$704FlexibilityNo cancel feeOn-time76%
Air FranceCheapest$506Average$558FlexibilityNo cancel feeOn-time77%
KLMCheapest$511Average$690FlexibilityNo cancel feeOn-time75%
Air CanadaCheapest$518Average$808FlexibilityNo cancel feeOn-time67%
Aer LingusCheapest$532Average$556FlexibilityNo cancel feeOn-timeN/A

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