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$256+ 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 4/22. Fares are subject to change and may not be available on all flights or dates of travel.
SEA — BRU
Apr 22 — Apr 291
Tue 4/22
Tue 4/29
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 April 17, 2025.

Round-trip from

$469
(Flightnetwork)

One-way from

$256
(Mytrip)

Popular in

June

Cheapest in

February

Average price

$633
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. 18% potential increase in price ($143 potential increase over avg. RT price).
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Cheapest flight prices on average. 3% potential price decrease ($22 potential savings vs. average RT price).
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Average for round-trip flights in April 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 April 17, 2025.

This Flightnetwork deal was found by Cheapflights users on 4/16. 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 Flightnetwork is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Sun 5/113:45 pmSEA - BRU
1 stop12h 05mIcelandair
Mon 5/191:50 pmBRU - SEA
1 stop13h 00mIcelandair
Deal found 4/16$469
This Air Canada deal was found by Cheapflights users on 4/16. 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 Air Canada is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Mon 11/245:45 amSEA - BRU
2 stops17h 10mAir Canada
Tue 12/210:00 amBRU - SEA
2 stops32h 50mAir Canada
Deal found 4/16$499
This United Airlines deal was found by Cheapflights users on 4/16. 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.
Wed 11/55:07 amSEA - BRU
2 stops17h 48mUnited Airlines
Thu 11/1310:00 amBRU - SEA
2 stops41h 09mUnited Airlines
Deal found 4/16$522
This Booking.com deal was found by Cheapflights users on 4/16. 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 Booking.com is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Tue 9/212:20 pmSEA - BRU
1 stop34h 30mBrussels Airlines
Tue 9/239:40 amBRU - SEA
1 stop34h 34mBrussels Airlines
Deal found 4/16$538
This FlightHub deal was found by Cheapflights users on 4/16. 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 FlightHub is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Mon 11/242:00 pmSEA - BRU
1 stop13h 35mLufthansa
Tue 12/210:00 amBRU - SEA
2 stops37h 30mLufthansa
Deal found 4/16$554
This United deal was found by Cheapflights users on 4/16. 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 is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Wed 11/56:30 amSEA - BRU
3 stops41h 25mMultiple Airlines
Thu 11/1310:30 amBRU - SEA
2 stops20h 20mMultiple Airlines
Deal found 4/16$573
This Delta deal was found by Cheapflights users on 4/16. 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 Delta is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Wed 7/302:05 pmSEA - BRU
1 stop15h 30mDelta
Mon 8/253:05 pmBRU - SEA
1 stop29h 30mDelta
Deal found 4/16$578
This SWISS deal was found by Cheapflights users on 4/17. 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 SWISS is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Mon 9/84:25 pmSEA - BRU
1 stop17h 50mSWISS
Mon 12/158:10 pmBRU - SEA
2 stops33h 44mSWISS
Deal found 4/17$579
This American Airlines deal was found by Cheapflights users on 4/16. 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 American Airlines is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Mon 9/229:44 amSEA - BRU
2 stops19h 36mAmerican Airlines
Mon 9/293:00 pmBRU - SEA
1 stop29h 10mAmerican Airlines
Deal found 4/16$583
This British Airways deal was found by Cheapflights users on 4/16. 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 British Airways is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Mon 8/48:20 pmSEA - BRU
1 stop33h 05mBritish Airways
Mon 8/2510:40 amBRU - SEA
1 stop33h 30mBritish Airways
Deal found 4/16$589
This Scandinavian Airlines deal was found by Cheapflights users on 4/17. 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 Scandinavian Airlines is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Mon 8/254:00 pmSEA - BRU
1 stop17h 30mScandinavian Airlines
Sat 8/307:10 pmBRU - SEA
1 stop27h 40mScandinavian Airlines
Deal found 4/17$646
This Austrian Airlines deal was found by Cheapflights users on 4/17. 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 Austrian Airlines is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Tue 8/197:00 amSEA - BRU
2 stops27h 10mAustrian Airlines
Sat 8/309:50 amBRU - SEA
2 stops41h 59mAustrian Airlines
Deal found 4/17$690

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 April 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 5/11

3:45 pm-12:50 pm

1 stop12h 05m

Brussels Bruxelles-National

Mon 5/19

1:50 pm-5:50 pm

1 stop13h 00m

$469

SeattleBrussels

SEA - BRU

SEABRU

Seattle/Tacoma Intl

Mon 8/4

10:00 am-8:00 am

2 stops37h 00m

Brussels Bruxelles-National

Thu 8/21

10:00 am-10:16 pm

2 stops45h 16m

$530

SeattleBrussels

SEA - BRU

SEABRU

Seattle/Tacoma Intl

Tue 9/2

12:20 pm-7:50 am

1 stop34h 30m

Brussels Bruxelles-National

Tue 9/23

9:40 am-11:14 am

1 stop34h 34m

$538

SeattleBrussels

SEA - BRU

SEABRU

Seattle/Tacoma Intl

Tue 9/9

7:20 am-8:05 am

1 stop15h 45m

Brussels Bruxelles-National

Wed 12/10

10:10 am-10:29 pm

1 stop21h 19m

$540

SeattleBrussels

SEA - BRU

SEABRU

Seattle/Tacoma Intl

Wed 7/30

2:20 pm-7:50 pm

2 stops20h 30m

Brussels Bruxelles-National

Thu 8/21

10:00 am-2:16 pm

2 stops37h 16m

$577

SeattleBrussels

SEA - BRU

SEABRU

Seattle/Tacoma Intl

Wed 7/30

2:05 pm-2:35 pm

1 stop15h 30m

Brussels Bruxelles-National

Mon 8/25

3:05 pm-11:35 am

1 stop29h 30m

$578

SeattleBrussels

SEA - BRU

SEABRU

Seattle/Tacoma Intl

Mon 9/8

4:25 pm-7:15 pm

1 stop17h 50m

Brussels Bruxelles-National

Mon 12/15

8:10 pm-8:54 pm

2 stops33h 44m

$579

SeattleBrussels

SEA - BRU

SEABRU

Seattle/Tacoma Intl

Mon 9/22

9:44 am-2:20 pm

2 stops19h 36m

Brussels Bruxelles-National

Mon 9/29

3:00 pm-11:10 am

1 stop29h 10m

$583

SeattleBrussels

SEA - BRU

SEABRU

Seattle/Tacoma Intl

Wed 5/14

11:30 am-1:15 pm

2 stops16h 45m

Brussels Bruxelles-National

Wed 5/21

10:00 am-7:37 pm

1 stop18h 37m

$585

SeattleBrussels

SEA - BRU

SEABRU

Seattle/Tacoma Intl

Mon 8/4

8:20 pm-2:25 pm

1 stop33h 05m

Brussels Bruxelles-National

Mon 8/25

10:40 am-11:10 am

1 stop33h 30m

$589

Flights are sorted by cheapest round-trip flights first.

Deals found on 4/16

Showing 1-10 of 21 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 $1,146). 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 April 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.

Rainfall in Belgium by month

Plan your trip to Belgium by taking into account the average rainfall totals by month.

In terms of precipitation, rainfall in Belgium ranges from 1.6 - 3.1 inches per month. January is typically the wettest month, when rainfall can reach 3.1 in. August is typically the driest time to visit Belgium when rainfall is around 1.6 in.

Temperature in Belgium by month

Plan your trip to Belgium by taking into account the average temperature totals by month.

If weather is an important factor for your trip to Belgium, use this chart to help with planning. For those seeking warmer temperatures, July is the ideal time of year to visit, when temperatures reach an average of 62.6 F. Travelers looking to avoid the cold should look outside of January, when temperatures are typically at their lowest (around 37.4 F).

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 April 17, 2025.
Peruse reviews from past customers who have flown with Delta, KLM and Austrian Airlines from Seattle to Belgium to help guide your decision. In addition to providing an overall rating, users have also rated airlines in terms of entertainment options, comfort, food, crew/service, and boarding process.
Delta
8.0
Very good
7,916 reviews

Boarding

8.2

Comfort

7.9

Crew

8.5

Entertainment

7.9

Food

7.3

Overall

8.0

Reviews

1 / 20
10.0
Excellent

Aaron,Oct 2024

LAX - LHR

This was a flight operated by Virgin Atlantic in their Upper Class cabin. Overall, an outstanding experience.
Delta
8.0
Very good
7,916 reviews
Delta
8.0
Very good
7,916 reviews

Boarding

8.2

Comfort

7.9

Crew

8.5

Entertainment

7.9

Food

7.3

Overall

8.0

Reviews

1 / 20
10.0
Excellent

Aaron,Oct 2024

LAX - LHR

This was a flight operated by Virgin Atlantic in their Upper Class cabin. Overall, an outstanding experience.
KLM
7.8
Good
1,327 reviews
Delta
8.0
Very good
7,916 reviews

Boarding

8.2

Comfort

7.9

Crew

8.5

Entertainment

7.9

Food

7.3

Overall

8.0

Reviews

1 / 20
10.0
Excellent

Aaron,Oct 2024

LAX - LHR

This was a flight operated by Virgin Atlantic in their Upper Class cabin. Overall, an outstanding experience.
Austrian Airlines
7.6
Good
775 reviews
Delta
8.0
Very good
7,916 reviews

Boarding

8.2

Comfort

7.9

Crew

8.5

Entertainment

7.9

Food

7.3

Overall

8.0

Reviews

1 / 20
10.0
Excellent

Aaron,Oct 2024

LAX - LHR

This was a flight operated by Virgin Atlantic in their Upper Class cabin. Overall, an outstanding experience.
SWISS
7.5
Good
1,580 reviews
Delta
8.0
Very good
7,916 reviews

Boarding

8.2

Comfort

7.9

Crew

8.5

Entertainment

7.9

Food

7.3

Overall

8.0

Reviews

1 / 20
10.0
Excellent

Aaron,Oct 2024

LAX - LHR

This was a flight operated by Virgin Atlantic in their Upper Class cabin. Overall, an outstanding experience.
United Airlines
7.4
Good
8,667 reviews
Delta
8.0
Very good
7,916 reviews

Boarding

8.2

Comfort

7.9

Crew

8.5

Entertainment

7.9

Food

7.3

Overall

8.0

Reviews

1 / 20
10.0
Excellent

Aaron,Oct 2024

LAX - LHR

This was a flight operated by Virgin Atlantic in their Upper Class cabin. Overall, an outstanding experience.

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 Icelandair, with whom users have recently found tickets for as low as $256. However, be on the lookout for offers from KLM 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 $1,146). 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 April 17, 2025.
AirlineCheapestAverageFlexibilityOn-time
IcelandairCheapest$403Average$538FlexibilityNo cancel feeOn-time76%
British AirwaysCheapest$495Average$659FlexibilityNo cancel feeOn-time70%
American AirlinesCheapest$501Average$589FlexibilityNo cancel feeOn-time71%
United AirlinesCheapest$529Average$656FlexibilityNo cancel feeOn-time69%
Aer LingusCheapest$532Average$544FlexibilityNo cancel feeOn-timeN/A
KLMCheapest$532Average$684FlexibilityNo cancel feeOn-time75%
Air CanadaCheapest$543Average$724FlexibilityNo cancel feeOn-time67%
DeltaCheapest$549Average$769FlexibilityNo cancel feeOn-timeN/A
Air FranceCheapest$554Average$768FlexibilityNo cancel feeOn-time77%
LufthansaCheapest$580Average$745FlexibilityNo cancel feeOn-time76%

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