$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 10/13. Fares are subject to change and may not be available on all flights or dates of travel.
SEA — BRU
Sep 16 — Sep 231
Round-trip
1 adult, Economy
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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
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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
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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 August 17, 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 August 17, 2026.
This SmartFares deal was found by Cheapflights users on 8/15. 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 SmartFares is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Wed 11/48:19 am -
2 stops24h 56m
Wed 11/1810:15 am -
2 stops18h 30m
Deal found 8/15![Multiple Airlines logo]()
$499
This Gotogate deal was found by Cheapflights users on 8/15. 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 10/57:00 pm -
1 stop32h 55m
Sun 10/181:50 pm -
1 stop13h 05m
Deal found 8/15![Icelandair logo]()
$556
This Gotogate deal was found by Cheapflights users on 8/16. 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 Gotogate is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Wed 9/303:40 pm -
1 stop12h 15m
Wed 10/71:50 pm -
1 stop13h 05m
Deal found 8/16![Icelandair logo]()
$557
This Mytrip deal was found by Cheapflights users on 8/15. 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.
Sat 10/103:40 pm -
1 stop12h 15m
Sun 10/2512:50 pm -
1 stop13h 10m
Deal found 8/15![Icelandair logo]()
$559
This Cheapflightsfares deal was found by Cheapflights users on 8/12. 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.
Sun 10/113:40 pm -
1 stop12h 15m
Sat 10/241:50 pm -
1 stop13h 05m
Deal found 8/12![Icelandair logo]()
$560
This Sembo deal was found by Cheapflights users on 8/14. 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 Sembo is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Fri 10/97:00 pm -
1 stop32h 55m
Thu 10/221:50 pm -
1 stop13h 05m
Deal found 8/14![Icelandair logo]()
$561
This deal was found by Cheapflights users on 8/14. 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 is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Sun 10/43:40 pm -
1 stop12h 15m
Fri 10/91:50 pm -
1 stop15h 50m
Deal found 8/14![Icelandair logo]()
$562
This oojo deal was found by Cheapflights users on 8/12. 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.
Sat 10/37:00 pm -
1 stop32h 55m
Sun 10/111:50 pm -
1 stop15h 50m
Deal found 8/12![Icelandair logo]()
$564
This oojo deal was found by Cheapflights users on 8/12. 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 10/57:00 pm -
1 stop32h 55m
Thu 10/151:50 pm -
1 stop15h 50m
Deal found 8/12![Icelandair logo]()
$565
This Justfly.com deal was found by Cheapflights users on 8/12. 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 Justfly.com is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Wed 9/303:40 pm -
1 stop12h 15m
Sun 10/181:50 pm -
1 stop13h 05m
Deal found 8/12![Icelandair logo]()
$567
This Mytrip deal was found by Cheapflights users on 8/14. 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 9/283:40 pm -
2 stops22h 15m
Fri 10/28:45 am -
2 stops18h 10m
Deal found 8/14![Multiple Airlines logo]()
$810
This Mytrip deal was found by Cheapflights users on 8/16. 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 Mytrip is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Wed 9/306:50 pm -
2 stops17h 40m
Tue 10/68:40 pm -
3 stops35h 02m
Deal found 8/16![Multiple Airlines logo]()
$908
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 August 17, 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 August 17, 2026.
This Icelandair deal was found by Cheapflights users on 8/16. 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 Icelandair is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Wed 12/22:35 pm -
1 stop12h 20m
Sun 12/612:50 pm -
1 stop13h 10m
Deal found 8/16![Icelandair logo]()
$579
This United Airlines deal was found by Cheapflights users on 8/14. 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 11/37:00 am -
2 stops21h 15m
Tue 11/1010:10 am -
1 stop17h 53m
Deal found 8/14![United Airlines logo]()
$724
This Delta deal was found by Cheapflights users on 8/16. 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.
Sun 10/116:00 am -
1 stop16h 40m
Mon 11/1610:45 am -
1 stop34h 02m
Deal found 8/16![Delta logo]()
$755
This British Airways deal was found by Cheapflights users on 8/16. 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.
Sun 10/118:20 pm -
1 stop33h 05m
Sat 11/149:40 am -
1 stop16h 10m
Deal found 8/16![British Airways logo]()
$766
This Kiwi.com deal was found by Cheapflights users on 8/14. 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 9/287:10 pm -
1 stop28h 15m
Fri 10/210:00 pm -
2 stops31h 40m
Deal found 8/14![Multiple Airlines logo]()
$923
This United Airlines deal was found by Cheapflights users on 8/13. 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.
Fri 12/46:50 am -
1 stop16h 15m
Fri 12/116:45 am -
1 stop15h 15m
Deal found 8/13![United Airlines logo]()
$732
This United Airlines deal was found by Cheapflights users on 8/13. 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.
Fri 12/411:00 am -
2 stops17h 15m
Sun 12/136:45 am -
1 stop15h 15m
Deal found 8/13![United Airlines logo]()
$734
This United Airlines deal was found by Cheapflights users on 8/13. 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 12/56:50 am -
1 stop16h 15m
Sat 12/127:00 am -
1 stop14h 00m
Deal found 8/13![United Airlines logo]()
$736
This Kiwi.com deal was found by Cheapflights users on 8/14. 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 9/217:10 pm -
1 stop28h 15m
Sun 10/49:05 am -
2 stops20h 35m
Deal found 8/14![Multiple Airlines logo]()
$926
This United Airlines deal was found by Cheapflights users on 8/16. 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.
Sun 10/115:40 am -
2 stops29h 20m
Fri 11/136:45 am -
1 stop15h 15m
Deal found 8/16![United Airlines logo]()
$748
This Kiwi.com deal was found by Cheapflights users on 8/16. 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 Kiwi.com is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Wed 9/307:10 pm -
1 stop28h 30m
Tue 10/69:00 pm -
2 stops29h 55m
Deal found 8/16![Multiple Airlines logo]()
$960
This Mytrip deal was found by Cheapflights users on 8/13. 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 9/108:00 am -
2 stops28h 30m
Thu 9/179:10 am -
3 stops33h 30m
Deal found 8/13![Multiple Airlines logo]()
$981
This Kiwi.com deal was found by Cheapflights users on 8/12. 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 10/47:10 pm -
1 stop17h 15m
Wed 10/149:20 am -
2 stops18h 40m
Deal found 8/12![Multiple Airlines logo]()
$983
This Kiwi.com deal was found by Cheapflights users on 8/14. 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 9/137:10 pm -
1 stop17h 15m
Mon 10/510:00 pm -
2 stops29h 45m
Deal found 8/14![Multiple Airlines logo]()
$988
This Mytrip deal was found by Cheapflights users on 8/17. 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 Mytrip is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Mon 10/53:40 pm -
2 stops22h 15m
Sun 10/189:05 am -
2 stops17h 50m
Deal found 8/17![Multiple Airlines logo]()
$1,001
This Kiwi.com deal was found by Cheapflights users on 8/14. 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 10/187:10 pm -
1 stop17h 15m
Thu 10/2912:00 pm -
2 stops38h 00m
Deal found 8/14![Multiple Airlines logo]()
$1,006
This Mytrip deal was found by Cheapflights users on 8/17. 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 Mytrip is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Wed 11/48:40 am -
3 stops23h 25m
Mon 11/911:10 am -
3 stops42h 49m
Deal found 8/17![Multiple Airlines logo]()
$1,065
Last-minute flights from Seattle to BelgiumDiscover last-minute flight deals from Seattle to Belgium. Data last updated August 17, 2026 and is based on user searches.
Discover last-minute flight deals from Seattle to Belgium. Data last updated August 17, 2026 and is based on user searches.
This oojo deal was found by Cheapflights users on 8/16. 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 oojo is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Tue 9/111:25 pm -
1 stop28h 30m
Wed 9/91:50 pm -
1 stop30h 55m
Deal found 8/16![Icelandair logo]()
$586
This oojo deal was found by Cheapflights users on 8/13. 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.
Sat 9/511:25 pm -
1 stop28h 30m
Wed 10/71:50 pm -
1 stop13h 05m
Deal found 8/13![Icelandair logo]()
$577
This Justfly.com deal was found by Cheapflights users on 8/13. 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 Justfly.com is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Sat 9/511:25 pm -
1 stop28h 30m
Thu 10/81:50 pm -
1 stop15h 50m
Deal found 8/13![Icelandair logo]()
$581
This Justfly.com deal was found by Cheapflights users on 8/13. 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 Justfly.com is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Sun 9/63:40 pm -
1 stop12h 15m
Thu 10/81:50 pm -
1 stop13h 05m
Deal found 8/13![Icelandair logo]()
$580
This Gotogate deal was found by Cheapflights users on 8/14. 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 9/217:00 pm -
1 stop32h 55m
Sun 10/41:50 pm -
1 stop15h 50m
Deal found 8/14![Icelandair logo]()
$562
This Justfly.com deal was found by Cheapflights users on 8/12. 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 Justfly.com is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Mon 9/287:00 pm -
1 stop32h 55m
Mon 10/191:50 pm -
1 stop13h 05m
Deal found 8/12![Icelandair logo]()
$575
This oojo deal was found by Cheapflights users on 8/12. 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 9/297:00 pm -
1 stop32h 55m
Sun 10/181:50 pm -
1 stop13h 05m
Deal found 8/12![Icelandair logo]()
$565
This Justfly.com deal was found by Cheapflights users on 8/12. 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 Justfly.com is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Tue 9/297:00 pm -
1 stop32h 55m
Mon 10/191:50 pm -
1 stop13h 05m
Deal found 8/12![Icelandair logo]()
$568
This Gotogate deal was found by Cheapflights users on 8/16. 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 Gotogate is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Wed 9/303:40 pm -
1 stop12h 15m
Wed 10/71:50 pm -
1 stop13h 05m
Deal found 8/16![Icelandair logo]()
$557
This deal was found by Cheapflights users on 8/14. 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 is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Wed 9/303:40 pm -
1 stop12h 15m
Fri 10/91:50 pm -
1 stop15h 50m
Deal found 8/14![Icelandair logo]()
$563
This Justfly.com deal was found by Cheapflights users on 8/12. 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 Justfly.com is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Wed 9/303:40 pm -
1 stop12h 15m
Sun 10/181:50 pm -
1 stop13h 05m
Deal found 8/12![Icelandair logo]()
$567
This Icelandair deal was found by Cheapflights users on 8/12. 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 Icelandair is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Wed 9/303:40 pm -
1 stop12h 15m
Thu 10/151:50 pm -
1 stop13h 05m
Deal found 8/12![Icelandair logo]()
$589
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 August 17, 2026.
Search for one-way flight options from Seattle to Belgium. Find affordable one-way fares based on user searches. Data last updated August 17, 2026.
This oojo deal was found by Cheapflights users on 8/13. 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 10/137:00 pm -
1 stop32h 55m
Deal found 8/13![Icelandair logo]()
$256
This FlightHub deal was found by Cheapflights users on 8/14. 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.
Sat 10/103:40 pm -
1 stop12h 15m
Deal found 8/14![Icelandair logo]()
$259
This Kiwi.com deal was found by Cheapflights users on 8/13. 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 10/197:00 pm -
3 stops30h 00m
Deal found 8/13![Multiple Airlines logo]()
$273
This Kiwi.com deal was found by Cheapflights users on 8/14. 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 10/117:00 pm -
3 stops39h 55m
Deal found 8/14![Multiple Airlines logo]()
$281
This Kiwi.com deal was found by Cheapflights users on 8/14. 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 10/127:00 pm -
3 stops39h 40m
Deal found 8/14![Multiple Airlines logo]()
$282
This Kiwi.com deal was found by Cheapflights users on 8/14. 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 10/127:00 pm -
3 stops29h 55m
Deal found 8/14![Multiple Airlines logo]()
$283
This Kiwi.com deal was found by Cheapflights users on 8/14. 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.
Sat 10/107:00 pm -
3 stops42h 30m
Deal found 8/14![Multiple Airlines logo]()
$283
This Kiwi.com deal was found by Cheapflights users on 8/13. 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 10/197:00 pm -
3 stops29h 55m
Deal found 8/13![Multiple Airlines logo]()
$284
This Mytrip deal was found by Cheapflights users on 8/16. 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 Mytrip is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Sat 12/122:35 pm -
1 stop12h 20m
Deal found 8/16![Icelandair logo]()
$305
This Mytrip deal was found by Cheapflights users on 8/16. 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 Mytrip is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Fri 9/411:25 pm -
1 stop28h 30m
Deal found 8/16![Icelandair logo]()
$313
This Kiwi.com deal was found by Cheapflights users on 8/14. 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 10/117:00 pm -
3 stops40h 35m
Deal found 8/14![Multiple Airlines logo]()
$325
This Kiwi.com deal was found by Cheapflights users on 8/14. 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.
Sat 10/107:00 pm -
2 stops29h 40m
Deal found 8/14![Multiple Airlines logo]()
$376
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 August 17, 2026.
Round-trip from | $482 (KAYAK) |
|---|---|
One-way from | $256 (oojo) |
Popular in | June |
Cheapest in | January |
Average price | $773 |
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 August 17, 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
Quickest round-trip
SeattleBrussels
SEA Seattle/Tacoma Intl - BRU Brussels Bruxelles-National
SEABRU
Seattle/Tacoma Intl
Wed 12/2
2:35 pm-11:55 am
1 stop12h 20m
Brussels Bruxelles-National
Sun 12/6
12:50 pm-5:00 pm
1 stop13h 10m
$579
SeattleBrussels
SEA Seattle/Tacoma Intl - BRU Brussels Bruxelles-National
SEABRU
Seattle/Tacoma Intl
Tue 11/3
7:00 am-1:15 pm
2 stops21h 15m
Brussels Bruxelles-National
Tue 11/10
10:10 am-7:03 pm
1 stop17h 53m
$724
SeattleBrussels
SEA Seattle/Tacoma Intl - BRU Brussels Bruxelles-National
SEABRU
Seattle/Tacoma Intl
Fri 12/4
6:50 am-8:05 am
1 stop16h 15m
Brussels Bruxelles-National
Fri 12/11
6:45 am-1:00 pm
1 stop15h 15m
$732
SeattleBrussels
SEA Seattle/Tacoma Intl - BRU Brussels Bruxelles-National
SEABRU
Seattle/Tacoma Intl
Fri 12/4
11:00 am-1:15 pm
2 stops17h 15m
Brussels Bruxelles-National
Sun 12/13
6:45 am-1:00 pm
1 stop15h 15m
$734
SeattleBrussels
SEA Seattle/Tacoma Intl - BRU Brussels Bruxelles-National
SEABRU
Seattle/Tacoma Intl
Sat 12/5
6:50 am-8:05 am
1 stop16h 15m
Brussels Bruxelles-National
Sat 12/12
7:00 am-12:00 pm
1 stop14h 00m
$736
SeattleBrussels
SEA Seattle/Tacoma Intl - BRU Brussels Bruxelles-National
SEABRU
Seattle/Tacoma Intl
Sun 10/11
5:40 am-8:00 pm
2 stops29h 20m
Brussels Bruxelles-National
Fri 11/13
6:45 am-1:00 pm
1 stop15h 15m
$748
SeattleBrussels
SEA Seattle/Tacoma Intl - BRU Brussels Bruxelles-National
SEABRU
Seattle/Tacoma Intl
Sun 10/11
6:00 am-7:40 am
1 stop16h 40m
Brussels Bruxelles-National
Mon 11/16
10:45 am-11:47 am
1 stop34h 02m
$755
SeattleBrussels
SEA Seattle/Tacoma Intl - BRU Brussels Bruxelles-National
SEABRU
Seattle/Tacoma Intl
Sun 10/11
8:20 pm-2:25 pm
1 stop33h 05m
Brussels Bruxelles-National
Sat 11/14
9:40 am-4:50 pm
1 stop16h 10m
$766
SeattleBrussels
SEA Seattle/Tacoma Intl - CRL Charleroi Brussels
SEACRL
Seattle/Tacoma Intl
Mon 9/28
7:10 pm-8:25 am
1 stop28h 15m
Charleroi Brussels
Fri 10/2
10:00 pm-8:40 pm
2 stops31h 40m
$923
SeattleBrussels
SEA Seattle/Tacoma Intl - CRL Charleroi Brussels
SEACRL
Seattle/Tacoma Intl
Mon 9/21
7:10 pm-8:25 am
1 stop28h 15m
Charleroi Brussels
Sun 10/4
9:05 am-8:40 pm
2 stops20h 35m
$926
Showing 1-10 of 33 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
SEA-CRL
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
SEA-CRL
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 $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 72 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 August 17, 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.
Overall
7.8
Comfort
7.7
Crew
8.4
Food
7.3
Boarding
7.8
Entertainment
7.2
Reviews
1 / 20
4.0
OkayAbhisek,Aug 2026
JFK - AMS
Overall
7.8
Comfort
7.7
Crew
8.4
Food
7.3
Boarding
7.8
Entertainment
7.2
Reviews
1 / 20
4.0
OkayAbhisek,Aug 2026
JFK - AMS
Overall
7.8
Comfort
7.7
Crew
8.4
Food
7.3
Boarding
7.8
Entertainment
7.2
Reviews
1 / 20
4.0
OkayAbhisek,Aug 2026
JFK - AMS
Overall
7.8
Comfort
7.7
Crew
8.4
Food
7.3
Boarding
7.8
Entertainment
7.2
Reviews
1 / 20
4.0
OkayAbhisek,Aug 2026
JFK - AMS
Overall
7.8
Comfort
7.7
Crew
8.4
Food
7.3
Boarding
7.8
Entertainment
7.2
Reviews
1 / 20
4.0
OkayAbhisek,Aug 2026
JFK - AMS
Overall
7.8
Comfort
7.7
Crew
8.4
Food
7.3
Boarding
7.8
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.
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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 August 17, 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 2,558,603 searches. Data last updated August 17, 2026.
| Airline | Cheapest | Average | Flexibility | On-time |
|---|---|---|---|---|
| Cheapest$382 | Average$557 | FlexibilityNo cancel fee | On-time76% | |
| Cheapest$421 | Average$621 | FlexibilityNo cancel fee | On-time70% | |
| Cheapest$481 | Average$764 | FlexibilityNo cancel fee | On-time75% | |
| Cheapest$494 | Average$697 | FlexibilityNo cancel fee | On-time76% | |
| Cheapest$502 | Average$789 | FlexibilityNo cancel fee | On-time69% | |
| Cheapest$509 | Average$759 | FlexibilityNo cancel fee | On-timeN/A |