HomeSearch by dateVacation packagesHotelsFlight dealsCar rentalTravel tips & news
Belgium

$211+ 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 4/25. Fares are subject to change and may not be available on all flights or dates of travel.
SEA — BRU
Feb 5 — Feb 121
Thu 2/5
Thu 2/12
1 adult, Economy
We work with more than 300 partners to bring you better travel deals

Find cheap flights from Seattle to Belgium with Cheapflights

1. Tell us where you want to go

Enter your travel information like dates, passengers, trip type (one-way or round trip), and preferred cabin class then click “Find deals”

2. Select your favorite providers

We find the providers serving your travel needs. Choose up to four travel providers to compare side-by-side for flights, hotels, or car rentals.

3. Compare prices and book

Review each provider’s pricing and select the best option for you! Book through your favorite provider’s website for a seamless experience.

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 6, 2026.

Round-trip from

$388
(Mytrip)

One-way from

$211
(oojo)

Popular in

December

Cheapest in

January

Average price

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

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 6, 2026.

This Mytrip deal was found by Cheapflights users on 1/5. 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 1/222:35 pmSEA - BRU
1 stop12h 20mIcelandair
Thu 2/512:50 pmBRU - SEA
1 stop13h 10mIcelandair
Deal found 1/5$388
This oojo deal was found by Cheapflights users on 1/6. 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 stop13h 05mIcelandair
Deal found 1/6$409
This Kiwi.com deal was found by Cheapflights users on 1/4. 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 Kiwi.com is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Thu 2/1910:55 amSEA - BRU
1 stop13h 00mLufthansa
Thu 2/2610:00 amBRU - SEA
2 stops18h 16mLufthansa
Deal found 1/4$442
This Kiwi.com deal was found by Cheapflights users on 1/5. 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 Kiwi.com is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Thu 2/1910:55 amSEA - BRU
1 stop13h 00mMultiple Airlines
Thu 2/2610:00 amBRU - SEA
2 stops18h 16mMultiple Airlines
Deal found 1/5$446
This Kiwi.com deal was found by Cheapflights users on 1/6. 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 Kiwi.com is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Thu 2/1910:55 amSEA - BRU
2 stops17h 20mMultiple Airlines
Fri 2/279:05 amBRU - SEA
1 stop13h 15mMultiple Airlines
Deal found 1/6$451
This oojo deal was found by Cheapflights users on 1/6. 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.
Tue 2/105:45 pmSEA - BRU
2 stops17h 00mBritish Airways
Tue 3/105:30 pmBRU - SEA
1 stop32h 25mBritish Airways
Deal found 1/6$452
This oojo deal was found by Cheapflights users on 1/6. 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 2/227:15 amSEA - BRU
2 stops27h 40mBritish Airways
Mon 3/23:00 pmBRU - SEA
1 stop34h 55mBritish Airways
Deal found 1/6$456
This oojo deal was found by Cheapflights users on 1/6. 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.
Tue 3/36:50 pmSEA - BRU
1 stop13h 10mBritish Airways
Wed 4/111:00 amBRU - SEA
1 stop16h 25mBritish Airways
Deal found 1/6$458
This Kiwi.com deal was found by Cheapflights users on 1/6. 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 Kiwi.com is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Thu 2/1910:55 amSEA - BRU
1 stop13h 00mLufthansa
Fri 2/276:45 amBRU - SEA
1 stop15h 35mLufthansa
Deal found 1/6$460
This Mytrip deal was found by Cheapflights users on 1/5. 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 4/266:50 pmSEA - CRL
2 stops18h 40mMultiple Airlines
Mon 5/48:15 pmCRL - SEA
2 stops25h 05mMultiple Airlines
Deal found 1/5$710
This Mytrip deal was found by Cheapflights users on 1/5. 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 4/232:10 pmSEA - CRL
2 stops23h 45mMultiple Airlines
Wed 4/298:55 pmCRL - SEA
2 stops24h 25mMultiple Airlines
Deal found 1/5$722
This Kiwi.com deal was found by Cheapflights users on 1/6. 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 Kiwi.com is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Sun 4/196:55 pmSEA - CRL
1 stop14h 20mMultiple Airlines
Wed 4/299:20 amCRL - SEA
1 stop16h 50mMultiple Airlines
Deal found 1/6$900

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 6, 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

Tue 3/3

1:37 pm-5:00 pm

2 stops18h 23m

Brussels Bruxelles-National

Wed 4/1

4:00 pm-11:13 pm

2 stops40h 13m

$458

SeattleBrussels

SEA - BRU

SEABRU

Seattle/Tacoma Intl

Thu 2/19

5:50 am-7:50 am

2 stops17h 00m

Brussels Bruxelles-National

Thu 2/26

9:40 am-7:16 pm

2 stops18h 36m

$476

SeattleBrussels

SEA - BRU

SEABRU

Seattle/Tacoma Intl

Fri 2/20

8:17 am-7:15 am

1 stop13h 58m

Brussels Bruxelles-National

Fri 2/27

10:10 am-7:03 pm

1 stop17h 53m

$484

SeattleBrussels

SEA - BRU

SEABRU

Seattle/Tacoma Intl

Fri 3/13

7:15 am-1:15 pm

2 stops22h 00m

Brussels Bruxelles-National

Mon 3/23

10:00 am-8:56 pm

2 stops42h 56m

$485

SeattleBrussels

SEA - BRU

SEABRU

Seattle/Tacoma Intl

Tue 2/10

8:40 am-1:15 pm

3 stops19h 35m

Brussels Bruxelles-National

Tue 3/10

10:00 am-11:49 am

2 stops33h 49m

$485

SeattleBrussels

SEA - BRU

SEABRU

Seattle/Tacoma Intl

Thu 2/19

6:50 pm-5:00 pm

1 stop13h 10m

Brussels Bruxelles-National

Fri 2/27

9:50 am-4:55 pm

1 stop16h 05m

$486

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

7:00 am-1:10 pm

1 stop14h 10m

$487

SeattleBrussels

SEA - BRU

SEABRU

Seattle/Tacoma Intl

Thu 2/19

3:40 pm-8:00 pm

2 stops19h 20m

Brussels Bruxelles-National

Fri 2/27

10:00 am-9:31 am

2 stops32h 31m

$494

SeattleBrussels

SEA - BRU

SEABRU

Seattle/Tacoma Intl

Wed 3/25

6:44 am-4:20 pm

2 stops25h 36m

Brussels Bruxelles-National

Mon 3/30

9:55 pm-12:24 am

2 stops35h 29m

$501

SeattleBrussels

SEA - CRL

SEACRL

Seattle/Tacoma Intl

Sun 4/26

6:50 pm-10:30 pm

2 stops18h 40m

Charleroi Brussels

Mon 5/4

8:15 pm-12:20 pm

2 stops25h 05m

$710

Flights are sorted by cheapest round-trip flights first.

Deals found on 1/6

Showing 1-10 of 23 results
1
2
3

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 6, 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

Crew

8.4

Overall

7.7

Comfort

7.6

Boarding

7.8

Food

7.2

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

Crew

8.4

Overall

7.7

Comfort

7.6

Boarding

7.8

Food

7.2

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
9,132 reviews
KLM
7.7
Good
1,434 reviews

Crew

8.4

Overall

7.7

Comfort

7.6

Boarding

7.8

Food

7.2

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

Crew

8.4

Overall

7.7

Comfort

7.6

Boarding

7.8

Food

7.2

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
7,683 reviews
KLM
7.7
Good
1,434 reviews

Crew

8.4

Overall

7.7

Comfort

7.6

Boarding

7.8

Food

7.2

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

Crew

8.4

Overall

7.7

Comfort

7.6

Boarding

7.8

Food

7.2

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 13h 58m. British Airways provides one of the quickest options available for as low as $484. 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

Browse thousands of different options on Cheapflights for your next trip

Toggle through the tabs below to find thousands of options on Cheapflights for your next trip.

Alternative routes for Seattle to Belgium

See prices for flight routes from nearby airports that may be better suited for you.
Seattle to Heathrow flights
Seattle to Istanbul flights
Seattle to Charles de Gaulle flights
Seattle to Leonardo da Vinci/Fiumicino flights
Seattle to Dublin flights
Seattle to Amsterdam flights
Seattle to Gatwick flights
Seattle to London City flights
Portland to Heathrow flights
Seattle to Stansted flights
Seattle to Orly flights
Seattle to Athens flights
Seattle to Sabiha Gokcen flights
Seattle to Barcelona-El Prat flights
Seattle to Lisbon flights
Seattle to Frankfurt flights
Seattle to Keflavik Intl flights
Seattle to Copenhagen flights
Portland to Amsterdam flights
Portland to Gatwick flights
Portland to Dublin flights
Seattle to Malpensa flights
Seattle to Madrid flights
Portland to Leonardo da Vinci/Fiumicino flights
Seattle to Linate flights
Portland to Charles de Gaulle flights
Seattle to Bruxelles-National flights
Seattle to Luton flights
Seattle to Zurich flights
Seattle to Munich flights
Seattle to Oslo Gardermoen flights
Portland to Barcelona-El Prat flights
Portland to Lisbon flights
Portland to Athens flights
Seattle to Geneva flights
Seattle to Vicenza flights
Portland to London City flights
Seattle to Edinburgh flights
Portland to Madrid flights
Portland to Orly flights
Seattle to Glasgow Intl flights
Portland to Stansted flights
Seattle to Prague flights
Portland to Frankfurt flights
Seattle to Porto flights
Seattle to Arlanda flights
Seattle to Berlin flights
Seattle to Helsinki flights
Portland to Vicenza flights
Portland to Oslo Gardermoen flights

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 6, 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

100% Free

Cheapflights is completely free to use, so you can start saving the moment you arrive.

Book with Flexibility

Our users can plan ahead with confidence and find flights with no change fees

Travel Smart

Millions of people come to us for their flight needs every year. We help make travel planning easy by providing useful insights and data-driven graphs that can inform your decisions.