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 1/24. Fares are subject to change and may not be available on all flights or dates of travel.
SEA — BRU
Jan 27 — Feb 31
Tue 1/27
Tue 2/3
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

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 December 28, 2025.

This British Airways deal was found by Cheapflights users on 12/26. 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.
Wed 12/316:50 pmSEA - BRU
1 stop12h 30mBritish Airways
Wed 1/710:25 amBRU - SEA
2 stops20h 42mBritish Airways
Deal found 12/26$847
This United Airlines deal was found by Cheapflights users on 12/28. 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.
Wed 12/318:57 amSEA - BRU
3 stops19h 18mUnited Airlines
Wed 1/79:40 amBRU - SEA
2 stops18h 36mUnited Airlines
Deal found 12/28$922
This Cheapflightsfares deal was found by Cheapflights users on 12/28. 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 Cheapflightsfares is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Wed 12/3110:52 amSEA - BRU
1 stop13h 03mLufthansa
Wed 1/710:10 amBRU - SEA
1 stop17h 04mLufthansa
Deal found 12/28$955
This Cathay Pacific deal was found by Cheapflights users on 12/26. 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 Cathay Pacific is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Wed 12/317:09 amSEA - BRU
3 stops42h 41mMultiple Airlines
Wed 1/710:25 amBRU - SEA
3 stops43h 09mMultiple Airlines
Deal found 12/26$11,125

Find flight deals from Seattle to Belgium

Keep the following information in mind while searching for Seattle to Belgium flight deals. Data was last updated December 28, 2025.

Round-trip from

$445
(Kiwi.com)

One-way from

$211
(oojo)

Popular in

December

Cheapest in

October

Average price

$840
From Seattle/Tacoma Intl to Belgium
Search Deals
One-way flight from Seattle/Tacoma Intl to Belgium
Search Deals
Highest demand for flights based on searches. 0% potential increase in price ($6 potential increase over avg. RT price).
Search Deals
Cheapest flight prices on average. 3% potential price decrease ($20 potential savings vs. average RT price).
Search Deals
Average for round-trip flights in December 2025
Search Deals

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 December 28, 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

Thu 2/26

5:45 am-7:50 am

2 stops17h 05m

Brussels Bruxelles-National

Wed 3/4

10:00 am-7:16 pm

2 stops18h 16m

$467

SeattleBrussels

SEA - BRU

SEABRU

Seattle/Tacoma Intl

Wed 2/11

3:40 pm-8:55 am

2 stops32h 15m

Brussels Bruxelles-National

Wed 2/18

10:00 am-7:16 pm

2 stops18h 16m

$481

SeattleBrussels

SEA - BRU

SEABRU

Seattle/Tacoma Intl

Tue 3/3

7:00 am-8:55 am

1 stop16h 55m

Brussels Bruxelles-National

Wed 4/1

7:00 am-12:20 pm

1 stop14h 20m

$484

SeattleBrussels

SEA - BRU

SEABRU

Seattle/Tacoma Intl

Tue 3/3

11:59 pm-1:15 pm

2 stops28h 16m

Brussels Bruxelles-National

Wed 4/1

9:25 am-10:37 pm

2 stops46h 12m

$484

SeattleBrussels

SEA - BRU

SEABRU

Seattle/Tacoma Intl

Wed 2/11

8:40 am-1:15 pm

3 stops19h 35m

Brussels Bruxelles-National

Wed 2/18

10:00 am-8:56 pm

2 stops43h 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-7:03 pm

2 stops41h 03m

$485

SeattleBrussels

SEA - BRU

SEABRU

Seattle/Tacoma Intl

Fri 3/13

7:50 pm-5:20 pm

1 stop13h 30m

Brussels Bruxelles-National

Mon 3/23

8:45 pm-12:30 pm

1 stop23h 45m

$486

SeattleBrussels

SEA - CRL

SEACRL

Seattle/Tacoma Intl

Sun 4/5

6:45 pm-6:15 pm

1 stop14h 30m

Charleroi Brussels

Tue 4/14

8:50 pm-7:25 pm

2 stops31h 35m

$864

SeattleBrussels

SEA - CRL

SEACRL

Seattle/Tacoma Intl

Thu 2/26

2:35 pm-3:30 pm

2 stops15h 55m

Charleroi Brussels

Wed 3/4

11:35 am-6:20 pm

2 stops15h 45m

$1,154

SeattleBrussels

SEA - CRL

SEACRL

Seattle/Tacoma Intl

Thu 3/19

3:00 pm-10:55 pm

2 stops23h 55m

Charleroi Brussels

Sat 3/28

5:15 pm-12:20 pm

2 stops27h 05m

$1,256

Flights are sorted by cheapest round-trip flights first.

Deals found on 12/26

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 $380). Flying from Seattle to Belgium in July is currently the most expensive (average of $507). 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 December 28, 2025.
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
1,435 reviews

Entertainment

7.1

Crew

8.4

Overall

7.7

Comfort

7.6

Boarding

7.7

Food

7.2

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
1,435 reviews
KLM
7.7
Good
1,435 reviews

Entertainment

7.1

Crew

8.4

Overall

7.7

Comfort

7.6

Boarding

7.7

Food

7.2

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
9,117 reviews
KLM
7.7
Good
1,435 reviews

Entertainment

7.1

Crew

8.4

Overall

7.7

Comfort

7.6

Boarding

7.7

Food

7.2

Reviews

1 / 20
8.0
Excellent

Anonymous,Dec 2025

YYC - AMS

Not literally sitting in the very last row in the middle
Icelandair
7.0
Good
592 reviews
KLM
7.7
Good
1,435 reviews

Entertainment

7.1

Crew

8.4

Overall

7.7

Comfort

7.6

Boarding

7.7

Food

7.2

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
7,657 reviews
KLM
7.7
Good
1,435 reviews

Entertainment

7.1

Crew

8.4

Overall

7.7

Comfort

7.6

Boarding

7.7

Food

7.2

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
7,617 reviews
KLM
7.7
Good
1,435 reviews

Entertainment

7.1

Crew

8.4

Overall

7.7

Comfort

7.6

Boarding

7.7

Food

7.2

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 $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 $380). Flying from Seattle to Belgium in July is currently the most expensive (average of $507). 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
Portland to Heathrow flights
Seattle to Amsterdam flights
Seattle to Gatwick flights
Seattle to Athens flights
Seattle to Frankfurt flights
Seattle to Sabiha Gokcen flights
Seattle to Orly flights
Seattle to Lisbon flights
Seattle to Barcelona-El Prat flights
Seattle to London City flights
Seattle to Stansted flights
Seattle to Copenhagen flights
Seattle to Munich flights
Portland to Amsterdam flights
Seattle to Madrid flights
Seattle to Oslo Gardermoen flights
Seattle to Keflavik Intl flights
Portland to Gatwick flights
Seattle to Zurich flights
Seattle to Malpensa flights
Portland to Charles de Gaulle flights
Portland to Leonardo da Vinci/Fiumicino flights
Portland to Dublin flights
Seattle to Bruxelles-National flights
Seattle to Linate flights
Portland to Orly flights
Portland to Barcelona-El Prat flights
Seattle to Prague flights
Seattle to Berlin flights
Portland to London City flights
Portland to Athens flights
Seattle to Vicenza flights
Portland to Madrid flights
Seattle to Arlanda flights
Portland to Lisbon flights
Seattle to Frederic Chopin flights
Portland to Stansted flights
Seattle to Luton flights
Seattle to Glasgow Intl flights
Seattle to Florence flights
Seattle to Edinburgh flights
Seattle to Málaga flights
Portland to Vicenza flights
Seattle to Geneva flights
Portland to Frankfurt 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 December 28, 2025.
AirlineCheapestAverageFlexibilityOn-time
IcelandairCheapest$387Average$491FlexibilityNo 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$703FlexibilityNo 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.