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$172+ 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 10/4. Fares are subject to change and may not be available on all flights or dates of travel.
SEA — BRU
jul. 8 — jul. 151
mar. 7/8
mar. 7/15
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 julio 3, 2025.

Round-trip from

$393
(oojo)

One-way from

$172
(FlightHub)

Popular in

June

Cheapest in

February

Average price

$761
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 ($118 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 julio 3, 2025.

This oojo deal was found by Cheapflights users on 7/2. 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.
vie. 10/103:45 pmSEA - BRU
1 stop12h 05mIcelandair
lun. 10/201:50 pmBRU - SEA
1 stop15h 50mIcelandair
Deal found 7/2$393
This United Airlines deal was found by Cheapflights users on 7/1. 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.
mar. 11/411:05 amSEA - BRU
1 stop12h 50mUnited Airlines
mar. 11/1110:00 amBRU - SEA
2 stops41h 57mUnited Airlines
Deal found 7/1$433
This Gotogate deal was found by Cheapflights users on 7/1. 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 Gotogate is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
mar. 11/43:40 pmSEA - BRU
2 stops19h 20mMultiple Airlines
mar. 11/1110:00 amBRU - SEA
2 stops20h 56mMultiple Airlines
Deal found 7/1$438
This Air Canada deal was found by Cheapflights users on 7/3. 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.
dom. 8/35:30 amSEA - BRU
2 stops17h 30mAir Canada
lun. 8/2510:00 amBRU - SEA
1 stop19h 41mAir Canada
Deal found 7/3$442
This Delta deal was found by Cheapflights users on 7/1. 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.
sáb. 8/96:00 amSEA - BRU
1 stop17h 40mDelta
sáb. 8/2310:45 amBRU - SEA
1 stop21h 30mDelta
Deal found 7/1$482
This KLM deal was found by Cheapflights users on 7/1. 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.
mié. 10/227:20 amSEA - BRU
1 stop16h 20mKLM
lun. 10/278:05 amBRU - SEA
1 stop12h 45mKLM
Deal found 7/1$496
This Finnair deal was found by Cheapflights users on 7/1. 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 Finnair is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
mié. 10/227:44 amSEA - BRU
2 stops29h 51mFinnair
lun. 10/277:10 pmBRU - SEA
2 stops34h 38mFinnair
Deal found 7/1$502
This Lufthansa deal was found by Cheapflights users on 7/1. 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 Lufthansa is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
lun. 8/182:20 pmSEA - BRU
2 stops20h 30mLufthansa
mar. 8/2610:00 amBRU - SEA
2 stops21h 16mLufthansa
Deal found 7/1$516
This British Airways deal was found by Cheapflights users on 7/1. 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.
vie. 8/151:30 pmSEA - BRU
1 stop22h 45mBritish Airways
vie. 8/2210:45 amBRU - SEA
2 stops18h 17mBritish Airways
Deal found 7/1$535
This Mytrip deal was found by Cheapflights users on 7/1. 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.
dom. 7/273:45 pmSEA - CRL
3 stops22h 10mMultiple Airlines
sáb. 8/96:40 amCRL - SEA
3 stops44h 58mMultiple Airlines
Deal found 7/1$894

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 julio 3, 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

vie. 10/10

3:45 pm-12:50 pm

1 stop12h 05m

Brussels Bruxelles-National

lun. 10/20

1:50 pm-8:40 pm

1 stop15h 50m

$393

SeattleBrussels

SEA - BRU

SEABRU

Seattle/Tacoma Intl

mar. 11/4

11:05 am-8:55 am

1 stop12h 50m

Brussels Bruxelles-National

mar. 11/11

10:00 am-6:57 pm

2 stops41h 57m

$433

SeattleBrussels

SEA - BRU

SEABRU

Seattle/Tacoma Intl

mar. 11/4

3:40 pm-8:00 pm

2 stops19h 20m

Brussels Bruxelles-National

mar. 11/11

10:00 am-9:56 pm

2 stops20h 56m

$438

SeattleBrussels

SEA - BRU

SEABRU

Seattle/Tacoma Intl

dom. 8/3

5:30 am-8:00 am

2 stops17h 30m

Brussels Bruxelles-National

lun. 8/25

10:00 am-8:41 pm

1 stop19h 41m

$442

SeattleBrussels

SEA - BRU

SEABRU

Seattle/Tacoma Intl

sáb. 8/9

6:00 am-8:40 am

1 stop17h 40m

Brussels Bruxelles-National

sáb. 8/23

10:45 am-11:15 pm

1 stop21h 30m

$482

SeattleBrussels

SEA - BRU

SEABRU

Seattle/Tacoma Intl

mié. 10/22

7:20 am-8:40 am

1 stop16h 20m

Brussels Bruxelles-National

lun. 10/27

8:05 am-12:50 pm

1 stop12h 45m

$496

SeattleBrussels

SEA - BRU

SEABRU

Seattle/Tacoma Intl

mié. 10/22

7:44 am-10:35 pm

2 stops29h 51m

Brussels Bruxelles-National

lun. 10/27

7:10 pm-9:48 pm

2 stops34h 38m

$502

SeattleBrussels

SEA - BRU

SEABRU

Seattle/Tacoma Intl

lun. 8/18

2:20 pm-7:50 pm

2 stops20h 30m

Brussels Bruxelles-National

mar. 8/26

10:00 am-10:16 pm

2 stops21h 16m

$516

SeattleBrussels

SEA - BRU

SEABRU

Seattle/Tacoma Intl

vie. 8/15

1:30 pm-9:15 pm

1 stop22h 45m

Brussels Bruxelles-National

vie. 8/22

10:45 am-8:02 pm

2 stops18h 17m

$535

SeattleBrussels

SEA - CRL

SEACRL

Seattle/Tacoma Intl

dom. 7/27

3:45 pm-10:55 pm

3 stops22h 10m

Charleroi Brussels

sáb. 8/9

6:40 am-6:38 pm

3 stops44h 58m

$894

Flights are sorted by cheapest round-trip flights first.

Deals found on 7/2

Showing 1-10 of 18 results
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
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 $1,079). 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 julio 3, 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 julio 3, 2025.
Peruse reviews from past customers who have flown with Delta, KLM, and Finnair 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
7,982 reviews

Entertainment

7.9

Crew

8.5

Food

7.3

Comfort

7.9

Boarding

8.2

Overall

8.0

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
7,982 reviews
Delta
8.0
Very good
7,982 reviews

Entertainment

7.9

Crew

8.5

Food

7.3

Comfort

7.9

Boarding

8.2

Overall

8.0

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
1,367 reviews
Delta
8.0
Very good
7,982 reviews

Entertainment

7.9

Crew

8.5

Food

7.3

Comfort

7.9

Boarding

8.2

Overall

8.0

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!
Finnair
7.6
Good
1,306 reviews
Delta
8.0
Very good
7,982 reviews

Entertainment

7.9

Crew

8.5

Food

7.3

Comfort

7.9

Boarding

8.2

Overall

8.0

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
8,861 reviews
Delta
8.0
Very good
7,982 reviews

Entertainment

7.9

Crew

8.5

Food

7.3

Comfort

7.9

Boarding

8.2

Overall

8.0

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!
Air Canada
7.1
Good
9,681 reviews
Delta
8.0
Very good
7,982 reviews

Entertainment

7.9

Crew

8.5

Food

7.3

Comfort

7.9

Boarding

8.2

Overall

8.0

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 Icelandair, with whom users have recently found tickets for as low as $172. However, be on the lookout for offers from TAP AIR PORTUGAL and Lufthansa, 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 $1,079). 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 julio 3, 2025.
AirlineCheapestAverageFlexibilityOn-time
IcelandairCheapest$393Average$499FlexibilityNo cancel feeOn-time76%
American AirlinesCheapest$501Average$589FlexibilityNo cancel feeOn-time71%
British AirwaysCheapest$502Average$679FlexibilityNo cancel feeOn-time70%
DeltaCheapest$514Average$741FlexibilityNo cancel feeOn-timeN/A
KLMCheapest$527Average$663FlexibilityNo cancel feeOn-time75%
United AirlinesCheapest$529Average$699FlexibilityNo 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$739FlexibilityNo cancel feeOn-time76%

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