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$311+ 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 11/5. Fares are subject to change and may not be available on all flights or dates of travel.
SEA — BRU
Aug 4 — Aug 111
Mon 8/4
Mon 8/11
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 July 30, 2025.

Round-trip from

$456
(Air Canada)

One-way from

$311
(Kiwi.com)

Popular in

June

Cheapest in

September

Average price

$743
From Seattle/Tacoma Intl to Belgium
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One-way flight from Seattle/Tacoma Intl to Belgium
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Highest demand for flights based on searches. 15% potential increase in price ($116 potential increase over avg. RT price).
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Cheapest flight prices on average. 3% potential price decrease ($20 potential savings vs. average RT price).
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Average for round-trip flights in July 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 July 30, 2025.

This Air Canada deal was found by Cheapflights users on 7/28. 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.
Sat 8/912:05 pmSEA - BRU
1 stop34h 45mAir Canada
Thu 8/219:40 amBRU - SEA
1 stop34h 20mAir Canada
Deal found 7/28$456
This Icelandair deal was found by Cheapflights users on 7/28. 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 Icelandair is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Thu 8/213:45 pmSEA - BRU
1 stop12h 05mIcelandair
Tue 9/21:50 pmBRU - SEA
1 stop13h 00mIcelandair
Deal found 7/28$457
This KLM deal was found by Cheapflights users on 7/28. 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.
Mon 11/177:20 amSEA - BRU
1 stop16h 40mKLM
Thu 12/411:00 amBRU - SEA
1 stop17h 29mKLM
Deal found 7/28$458
This Delta deal was found by Cheapflights users on 7/28. 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 Delta is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Sun 8/105:55 pmSEA - BRU
2 stops29h 45mDelta
Thu 8/2110:45 amBRU - SEA
1 stop18h 29mDelta
Deal found 7/28$462
This Ovago deal was found by Cheapflights users on 7/28. 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 Ovago is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Wed 11/1910:53 amSEA - BRU
1 stop13h 02mLufthansa
Wed 12/310:00 amBRU - SEA
2 stops18h 16mLufthansa
Deal found 7/28$466
This Ovago deal was found by Cheapflights users on 7/30. 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 Ovago is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Wed 11/196:50 pmSEA - BRU
1 stop12h 30mBritish Airways
Wed 12/311:50 amBRU - SEA
1 stop14h 05mBritish Airways
Deal found 7/30$469
This Booking.com deal was found by Cheapflights users on 7/28. 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 Booking.com is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Mon 8/257:15 pmSEA - BRU
2 stops27h 45mMultiple Airlines
Tue 9/210:00 amBRU - SEA
2 stops45h 16mMultiple Airlines
Deal found 7/28$473
This Virgin Atlantic deal was found by Cheapflights users on 7/30. 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 Virgin Atlantic is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Tue 8/265:30 amSEA - BRU
2 stops18h 10mVirgin Atlantic
Tue 9/210:45 amBRU - SEA
2 stops20h 29mVirgin Atlantic
Deal found 7/30$480
This United Airlines deal was found by Cheapflights users on 7/28. 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 8/247:20 amSEA - BRU
1 stop15h 40mUnited Airlines
Wed 9/310:00 amBRU - SEA
3 stops21h 52mUnited Airlines
Deal found 7/28$483
This Mytrip deal was found by Cheapflights users on 7/28. 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.
Mon 8/117:35 pmSEA - CRL
2 stops18h 20mMultiple Airlines
Wed 8/276:35 amCRL - SEA
2 stops20h 15mMultiple Airlines
Deal found 7/28$747

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 July 30, 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

Sat 8/9

12:05 pm-7:50 am

1 stop34h 45m

Brussels Bruxelles-National

Thu 8/21

9:40 am-11:00 am

1 stop34h 20m

$456

SeattleBrussels

SEA - BRU

SEABRU

Seattle/Tacoma Intl

Thu 8/21

3:45 pm-12:50 pm

1 stop12h 05m

Brussels Bruxelles-National

Thu 9/4

1:50 pm-5:50 pm

1 stop13h 00m

$457

SeattleBrussels

SEA - BRU

SEABRU

Seattle/Tacoma Intl

Mon 11/17

7:20 am-9:00 am

1 stop16h 40m

Brussels Bruxelles-National

Thu 12/4

11:00 am-7:29 pm

1 stop17h 29m

$458

SeattleBrussels

SEA - BRU

SEABRU

Seattle/Tacoma Intl

Sun 8/10

5:55 pm-8:40 am

2 stops29h 45m

Brussels Bruxelles-National

Thu 8/21

10:45 am-11:59 pm

2 stops22h 14m

$462

SeattleBrussels

SEA - BRU

SEABRU

Seattle/Tacoma Intl

Wed 11/19

10:53 am-8:55 am

1 stop13h 02m

Brussels Bruxelles-National

Wed 12/3

10:00 am-7:16 pm

2 stops18h 16m

$466

SeattleBrussels

SEA - BRU

SEABRU

Seattle/Tacoma Intl

Wed 11/19

6:50 pm-4:20 pm

1 stop12h 30m

Brussels Bruxelles-National

Wed 12/3

11:50 am-4:55 pm

1 stop14h 05m

$469

SeattleBrussels

SEA - BRU

SEABRU

Seattle/Tacoma Intl

Mon 8/25

7:15 pm-8:00 am

2 stops27h 45m

Brussels Bruxelles-National

Tue 9/2

10:00 am-10:16 pm

2 stops45h 16m

$473

SeattleBrussels

SEA - BRU

SEABRU

Seattle/Tacoma Intl

Tue 8/26

5:30 am-8:40 am

2 stops18h 10m

Brussels Bruxelles-National

Tue 9/2

10:45 am-10:14 pm

2 stops20h 29m

$480

SeattleBrussels

SEA - BRU

SEABRU

Seattle/Tacoma Intl

Sun 8/24

7:20 am-8:00 am

1 stop15h 40m

Brussels Bruxelles-National

Wed 9/3

10:00 am-10:52 pm

3 stops21h 52m

$483

SeattleBrussels

SEA - CRL

SEACRL

Seattle/Tacoma Intl

Mon 8/11

7:35 pm-10:55 pm

2 stops18h 20m

Charleroi Brussels

Wed 8/27

6:35 am-5:50 pm

2 stops20h 15m

$747

Flights are sorted by cheapest round-trip flights first.

Deals found on 7/28

Showing 1-10 of 21 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, 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 $1,081). 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 July 30, 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 July 30, 2025.
Peruse reviews from past customers who have flown with Delta, KLM, and United 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.
Delta
8.0
Very good
7,980 reviews

Food

7.3

Boarding

8.2

Comfort

7.9

Crew

8.5

Overall

8.0

Entertainment

7.9

Reviews

1 / 20
10.0
Excellent

Kim,May 2025

PIH - SLC

This trip was fine even with delay I had plenty of time to get connection flight!
Delta
8.0
Very good
7,980 reviews
Delta
8.0
Very good
7,980 reviews

Food

7.3

Boarding

8.2

Comfort

7.9

Crew

8.5

Overall

8.0

Entertainment

7.9

Reviews

1 / 20
10.0
Excellent

Kim,May 2025

PIH - SLC

This trip was fine even with delay I had plenty of time to get connection flight!
KLM
7.8
Good
1,383 reviews
Delta
8.0
Very good
7,980 reviews

Food

7.3

Boarding

8.2

Comfort

7.9

Crew

8.5

Overall

8.0

Entertainment

7.9

Reviews

1 / 20
10.0
Excellent

Kim,May 2025

PIH - SLC

This trip was fine even with delay I had plenty of time to get connection flight!
United Airlines
7.4
Good
8,896 reviews
Delta
8.0
Very good
7,980 reviews

Food

7.3

Boarding

8.2

Comfort

7.9

Crew

8.5

Overall

8.0

Entertainment

7.9

Reviews

1 / 20
10.0
Excellent

Kim,May 2025

PIH - SLC

This trip was fine even with delay I had plenty of time to get connection flight!
Virgin Atlantic
7.4
Good
655 reviews
Delta
8.0
Very good
7,980 reviews

Food

7.3

Boarding

8.2

Comfort

7.9

Crew

8.5

Overall

8.0

Entertainment

7.9

Reviews

1 / 20
10.0
Excellent

Kim,May 2025

PIH - SLC

This trip was fine even with delay I had plenty of time to get connection flight!
Brussels Airlines
7.3
Good
350 reviews
Delta
8.0
Very good
7,980 reviews

Food

7.3

Boarding

8.2

Comfort

7.9

Crew

8.5

Overall

8.0

Entertainment

7.9

Reviews

1 / 20
10.0
Excellent

Kim,May 2025

PIH - SLC

This trip was fine even with delay I had plenty of time to get connection flight!

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.

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

    The cheapest airline one-way is TAP AIR PORTUGAL, with whom users have recently found tickets for as low as $320. However, be on the lookout for offers from Icelandair and Delta, 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, 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 $1,081). 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 July 30, 2025.
AirlineCheapestAverageFlexibilityOn-time
IcelandairCheapest$389Average$496FlexibilityNo cancel feeOn-time76%
American AirlinesCheapest$501Average$620FlexibilityNo cancel feeOn-time71%
British AirwaysCheapest$502Average$691FlexibilityNo cancel feeOn-time70%
KLMCheapest$511Average$709FlexibilityNo cancel feeOn-time75%
DeltaCheapest$514Average$717FlexibilityNo cancel feeOn-timeN/A
United AirlinesCheapest$522Average$675FlexibilityNo cancel feeOn-time69%
Aer LingusCheapest$532Average$538FlexibilityNo cancel feeOn-timeN/A
Air CanadaCheapest$543Average$740FlexibilityNo cancel feeOn-time67%
Air FranceCheapest$547Average$665FlexibilityNo cancel feeOn-time77%
LufthansaCheapest$570Average$736FlexibilityNo cancel feeOn-time76%

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