$333+ Cheap flights from Seattle (SEA) to Belgium
This is the cheapest round-trip flight price found by a Cheapflights user in the last 72 hours by searching for a flight departing on 4/6. Fares are subject to change and may not be available on all flights or dates of travel.
SEA — BRU
Nov 29 — Dec 61
Round-trip
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
Best
Last-minute
One-way
Cheapest flights from Seattle to BelgiumExplore 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 October 30, 2026.
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 October 30, 2026.
This Gotogate deal was found by Cheapflights users on 10/29. 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.
Mon 11/232:35 pm -
1 stop12h 20m
Tue 12/812:50 pm -
1 stop13h 10m
Deal found 10/29![Icelandair logo]()
$567
This Mytrip deal was found by Cheapflights users on 10/28. 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.
Sun 11/292:50 pm -
3 stops35h 00m
Fri 12/47:20 pm -
3 stops34h 39m
Deal found 10/28![Multiple Airlines logo]()
$705
This Mytrip deal was found by Cheapflights users on 10/29. 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 11/232:35 pm -
2 stops19h 05m
Tue 12/86:15 am -
3 stops19h 45m
Deal found 10/29![Multiple Airlines logo]()
$745
This Gotogate deal was found by Cheapflights users on 10/25. 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.
Mon 11/237:05 pm -
2 stops27h 45m
Tue 12/810:00 am -
2 stops41h 22m
Deal found 10/25![Air Canada logo]()
$769
This Kiwi.com deal was found by Cheapflights users on 10/26. 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 Kiwi.com is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Mon 11/22:35 pm -
1 stop12h 20m
Thu 12/312:50 pm -
1 stop13h 10m
Deal found 10/26![Icelandair logo]()
$782
This Mytrip deal was found by Cheapflights users on 10/29. 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.
Wed 12/22:35 pm -
3 stops34h 00m
Mon 12/78:30 pm -
2 stops29h 30m
Deal found 10/29![Multiple Airlines logo]()
$787
This United Airlines deal was found by Cheapflights users on 10/25. 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.
Mon 11/237:00 am -
2 stops21h 15m
Tue 12/811:55 am -
1 stop18h 06m
Deal found 10/25![United Airlines logo]()
$792
Best flights from Seattle to BelgiumDiscover carefully curated flight deals from Seattle to Belgium that have cost, travel time, and layovers in mind to ensure you get the best travel experience. Data last updated October 30, 2026.
Discover carefully curated flight deals from Seattle to Belgium that have cost, travel time, and layovers in mind to ensure you get the best travel experience. Data last updated October 30, 2026.
This United Airlines deal was found by Cheapflights users on 10/26. 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 United Airlines is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Sun 4/1810:10 am -
2 stops24h 50m
Thu 4/228:35 am -
1 stop12h 45m
Deal found 10/26![United Airlines logo]()
$748
This Turkish Airlines deal was found by Cheapflights users on 10/28. 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 Turkish Airlines is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Thu 12/37:05 pm -
1 stop18h 15m
Wed 12/93:15 pm -
1 stop34h 55m
Deal found 10/28![Turkish Airlines logo]()
$807
This Gotogate deal was found by Cheapflights users on 10/30. 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 Gotogate is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Mon 11/233:15 pm -
2 stops19h 55m
Tue 12/810:00 am -
2 stops37h 37m
Deal found 10/30![Air Canada logo]()
$819
This Delta deal was found by Cheapflights users on 10/25. 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.
Tue 3/96:00 am -
1 stop20h 00m
Fri 3/196:15 am -
1 stop14h 20m
Deal found 10/25![Delta logo]()
$835
This United deal was found by Cheapflights users on 10/28. 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 is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Thu 12/32:05 pm -
1 stop33h 50m
Wed 12/910:00 am -
2 stops37h 37m
Deal found 10/28![Multiple Airlines logo]()
$843
This United Airlines deal was found by Cheapflights users on 10/25. 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.
Sat 4/1011:50 pm -
2 stops28h 25m
Sun 4/1810:15 am -
1 stop22h 59m
Deal found 10/25![United Airlines logo]()
$806
This United Airlines deal was found by Cheapflights users on 10/25. 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.
Thu 1/288:30 am -
3 stops19h 45m
Mon 2/11:45 pm -
2 stops37h 27m
Deal found 10/25![United Airlines logo]()
$814
This United Airlines deal was found by Cheapflights users on 10/30. 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 United Airlines is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Mon 11/237:00 am -
2 stops21h 15m
Tue 12/811:55 am -
1 stop18h 06m
Deal found 10/30![United Airlines logo]()
$850
Last-minute flights from Seattle to BelgiumDiscover last-minute flight deals from Seattle to Belgium. Data last updated October 30, 2026 and is based on user searches.
Discover last-minute flight deals from Seattle to Belgium. Data last updated October 30, 2026 and is based on user searches.
This Kiwi.com deal was found by Cheapflights users on 10/26. 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 Kiwi.com is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Mon 11/22:35 pm -
1 stop12h 20m
Thu 12/312:50 pm -
1 stop13h 10m
Deal found 10/26![Icelandair logo]()
$782
This Gotogate deal was found by Cheapflights users on 10/29. 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.
Mon 11/232:35 pm -
1 stop12h 20m
Tue 12/812:50 pm -
1 stop13h 10m
Deal found 10/29![Icelandair logo]()
$567
This Mytrip deal was found by Cheapflights users on 10/29. 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 11/232:35 pm -
2 stops19h 05m
Tue 12/86:15 am -
3 stops19h 45m
Deal found 10/29![Multiple Airlines logo]()
$745
This Gotogate deal was found by Cheapflights users on 10/25. 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.
Mon 11/237:05 pm -
2 stops27h 45m
Tue 12/810:00 am -
2 stops41h 22m
Deal found 10/25![Air Canada logo]()
$769
This United Airlines deal was found by Cheapflights users on 10/25. 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.
Mon 11/237:00 am -
2 stops21h 15m
Tue 12/811:55 am -
1 stop18h 06m
Deal found 10/25![United Airlines logo]()
$792
This Mytrip deal was found by Cheapflights users on 10/28. 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.
Sun 11/292:50 pm -
3 stops35h 00m
Fri 12/47:20 pm -
3 stops34h 39m
Deal found 10/28![Multiple Airlines logo]()
$705
One-way flights from Seattle to BelgiumSearch for one-way flight options from Seattle to Belgium. Find affordable one-way fares based on user searches. Data last updated October 30, 2026.
Search for one-way flight options from Seattle to Belgium. Find affordable one-way fares based on user searches. Data last updated October 30, 2026.
This Air Canada deal was found by Cheapflights users on 10/29. 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.
Tue 4/68:40 am -
2 stops26h 20m
Wed 12/3112:00 am -
Nonstop0h 00m
Deal found 10/29![Air Canada logo]()
$333
This British Airways deal was found by Cheapflights users on 10/29. 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.
Tue 4/68:20 pm -
1 stop15h 05m
Wed 12/3112:00 am -
Nonstop0h 00m
Deal found 10/29![British Airways logo]()
$334
This Kiwi.com deal was found by Cheapflights users on 10/27. 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.
Mon 12/72:35 pm -
2 stops19h 05m
Wed 12/3112:00 am -
Nonstop0h 00m
Deal found 10/27![Multiple Airlines logo]()
$358
This Cheapflightsfares deal was found by Cheapflights users on 10/26. 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 Cheapflightsfares is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Mon 11/911:34 pm -
2 stops25h 06m
Wed 12/3112:00 am -
Nonstop0h 00m
Deal found 10/26![Aer Lingus logo]()
$434
This Kiwi.com deal was found by Cheapflights users on 10/29. 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 1/32:30 pm -
3 stops58h 20m
Wed 12/3112:00 am -
Nonstop0h 00m
Deal found 10/29![Multiple Airlines logo]()
$445
This United Airlines deal was found by Cheapflights users on 10/29. 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.
Tue 4/68:30 am -
3 stops26h 30m
Wed 12/3112:00 am -
Nonstop0h 00m
Deal found 10/29![United Airlines logo]()
$458
This Kiwi.com deal was found by Cheapflights users on 10/26. 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 Kiwi.com is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Mon 11/97:48 pm -
3 stops52h 27m
Wed 12/3112:00 am -
Nonstop0h 00m
Deal found 10/26![Multiple Airlines logo]()
$505
This FlightHub deal was found by Cheapflights users on 10/26. 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 FlightHub is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Fri 11/61:35 pm -
2 stops35h 05m
Wed 12/3112:00 am -
Nonstop0h 00m
Deal found 10/26![Aer Lingus logo]()
$528
This oojo deal was found by Cheapflights users on 10/26. 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 oojo is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Mon 11/97:05 pm -
1 stop30h 30m
Wed 12/3112:00 am -
Nonstop0h 00m
Deal found 10/26![Turkish Airlines logo]()
$560
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 October 30, 2026.
Round-trip from | $567 (Gotogate) |
|---|---|
One-way from | $333 (Air Canada) |
Popular in | June |
Cheapest in | February |
Average price | $677 |
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 7,457,451 searches. Data last updated October 30, 2026.
Use the filters below to find and compare flights from Seattle to Belgium that are best for you.
Fly from
Fly to
Route
Depart
Return
Cheapest round-trip
SeattleBrussels
SEA Seattle/Tacoma Intl - BRU Brussels Bruxelles-National
SEABRU
Seattle/Tacoma Intl
Tue 4/6
8:40 am-8:00 pm
2 stops26h 20m
Brussels Bruxelles-National
Wed 12/31
12:00 am-3:00 pm
Nonstop0h 00m
$333
SeattleBrussels
SEA Seattle/Tacoma Intl - BRU Brussels Bruxelles-National
SEABRU
Seattle/Tacoma Intl
Mon 12/7
2:35 pm-7:50 pm
3 stops20h 15m
Brussels Bruxelles-National
Wed 12/31
12:00 am-3:00 pm
Nonstop0h 00m
$382
SeattleBrussels
SEA Seattle/Tacoma Intl - BRU Brussels Bruxelles-National
SEABRU
Seattle/Tacoma Intl
Mon 11/9
11:34 pm-9:40 am
2 stops25h 06m
Brussels Bruxelles-National
Wed 12/31
12:00 am-3:00 pm
Nonstop0h 00m
$434
SeattleBrussels
SEA Seattle/Tacoma Intl - BRU Brussels Bruxelles-National
SEABRU
Seattle/Tacoma Intl
Mon 11/9
7:48 pm-9:15 am
3 stops52h 27m
Brussels Bruxelles-National
Wed 12/31
12:00 am-3:00 pm
Nonstop0h 00m
$505
SeattleBrussels
SEA Seattle/Tacoma Intl - BRU Brussels Bruxelles-National
SEABRU
Seattle/Tacoma Intl
Mon 11/9
7:05 pm-10:35 am
1 stop30h 30m
Brussels Bruxelles-National
Wed 12/31
12:00 am-3:00 pm
Nonstop0h 00m
$560
SeattleBrussels
SEA Seattle/Tacoma Intl - BRU Brussels Bruxelles-National
SEABRU
Seattle/Tacoma Intl
Sun 1/3
9:38 pm-9:50 am
2 stops51h 12m
Brussels Bruxelles-National
Wed 12/31
12:00 am-3:00 pm
Nonstop0h 00m
$563
SeattleBrussels
SEA Seattle/Tacoma Intl - BRU Brussels Bruxelles-National
SEABRU
Seattle/Tacoma Intl
Sun 1/3
6:45 pm-11:10 am
1 stop31h 25m
Brussels Bruxelles-National
Wed 12/31
12:00 am-3:00 pm
Nonstop0h 00m
$582
SeattleBrussels
SEA Seattle/Tacoma Intl - BRU Brussels Bruxelles-National
SEABRU
Seattle/Tacoma Intl
Sun 1/3
11:44 pm-7:15 am
2 stops22h 31m
Brussels Bruxelles-National
Wed 12/31
12:00 am-3:00 pm
Nonstop0h 00m
$588
SeattleBrussels
SEA Seattle/Tacoma Intl - BRU Brussels Bruxelles-National
SEABRU
Seattle/Tacoma Intl
Sat 1/2
11:14 pm-7:35 am
2 stops23h 21m
Brussels Bruxelles-National
Wed 12/31
12:00 am-3:00 pm
Nonstop0h 00m
$595
SeattleBrussels
SEA Seattle/Tacoma Intl - BRU Brussels Bruxelles-National
SEABRU
Seattle/Tacoma Intl
Sat 1/2
7:10 pm-5:10 pm
2 stops37h 00m
Brussels Bruxelles-National
Wed 12/31
12:00 am-3:00 pm
Nonstop0h 00m
$608
Showing 1-10 of 20 resultsSorted by cheapest first
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.
SEA-BRU
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
SEA-BE0
SEA-BRU
What is the cheapest month to book a flight from Seattle to Belgium?
Currently, February is the cheapest month in which you can book a flight from Seattle to Belgium (average of $510). Flying from Seattle to Belgium in June is currently the most expensive (average of $1,284). 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.
How far ahead should I book a flight from Seattle to Belgium?
Booking 70 days in advance of your planned departure date is, on average, the best time to get cheap flights from Seattle to Belgium. The general trend is that the closer you book to the departure date, the more expensive your flight will be.
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 October 30, 2026.
Peruse reviews from past customers who have flown with KLM,Delta, andUnited 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.
Boarding
7.8
Crew
8.4
Food
7.4
Overall
7.8
Comfort
7.7
Entertainment
7.2
Reviews
1 / 20
4.0
OkayAbhisek,Aug 2026
JFK - AMS
Boarding
7.8
Crew
8.4
Food
7.4
Overall
7.8
Comfort
7.7
Entertainment
7.2
Reviews
1 / 20
4.0
OkayAbhisek,Aug 2026
JFK - AMS
Boarding
7.8
Crew
8.4
Food
7.4
Overall
7.8
Comfort
7.7
Entertainment
7.2
Reviews
1 / 20
4.0
OkayAbhisek,Aug 2026
JFK - AMS
Boarding
7.8
Crew
8.4
Food
7.4
Overall
7.8
Comfort
7.7
Entertainment
7.2
Reviews
1 / 20
4.0
OkayAbhisek,Aug 2026
JFK - AMS
Boarding
7.8
Crew
8.4
Food
7.4
Overall
7.8
Comfort
7.7
Entertainment
7.2
Reviews
1 / 20
4.0
OkayAbhisek,Aug 2026
JFK - AMS
Boarding
7.8
Crew
8.4
Food
7.4
Overall
7.8
Comfort
7.7
Entertainment
7.2
Reviews
1 / 20
4.0
OkayAbhisek,Aug 2026
JFK - AMS
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.
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
Complete your trip
Flights by cabin class
Other flight options
Popular flights
Alternative routes for Seattle to Belgium
See prices for flight routes from nearby airports that may be better suited for you.
Complete your trip
Complete your trip to Belgium by adding a car rental and/or hotel reservation to your travel itinerary.
Search flights from Seattle to Belgium by cabin class
Find flights from Seattle to Belgium, based on your preferred cabin class, be it economy, premium economy, business, or first class.
Seattle and Belgium flights
Browse other Seattle and Belgium flight options. Last updated on October 30, 2026.
Popular flight searches
Check out other popular destinations found by fellow travelers in 2026
Top 6 airlines flying from Seattle to Belgium
Discover the top 6 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 7,457,451 searches. Data last updated October 30, 2026.
| Airline | Cheapest | Average | Flexibility | On-time |
|---|---|---|---|---|
| Cheapest$393 | Average$579 | FlexibilityNo cancel fee | On-time76% | |
| Cheapest$421 | Average$689 | FlexibilityNo cancel fee | On-time70% | |
| Cheapest$481 | Average$680 | FlexibilityNo cancel fee | On-time75% | |
| Cheapest$496 | Average$779 | FlexibilityNo cancel fee | On-time76% | |
| Cheapest$509 | Average$759 | FlexibilityNo cancel fee | On-timeN/A | |
| Cheapest$522 | Average$847 | FlexibilityNo cancel fee | On-time69% |