$242+ 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 10/10. Fares are subject to change and may not be available on all flights or dates of travel.
SEA — BRU
Sep 23 — Sep 301
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 24, 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 24, 2026.
This oojo deal was found by Cheapflights users on 8/19. 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.
Wed 12/22:35 pm -
1 stop12h 20m
Sun 12/612:50 pm -
1 stop13h 10m
Deal found 8/19![Icelandair logo]()
$510
This Mytrip deal was found by Cheapflights users on 8/20. 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 10/163:40 pm -
1 stop12h 15m
Sun 10/2512:50 pm -
1 stop13h 10m
Deal found 8/20![Icelandair logo]()
$519
This oojo deal was found by Cheapflights users on 8/20. 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 10/173:40 pm -
1 stop12h 15m
Sun 10/2512:50 pm -
1 stop15h 50m
Deal found 8/20![Icelandair logo]()
$520
This oojo deal was found by Cheapflights users on 8/19. 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 10/103:40 pm -
1 stop12h 15m
Fri 10/231:50 pm -
1 stop13h 05m
Deal found 8/19![Icelandair logo]()
$521
This oojo deal was found by Cheapflights users on 8/19. 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 8/19![Icelandair logo]()
$523
This oojo deal was found by Cheapflights users on 8/19. 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 9/263:40 pm -
1 stop12h 15m
Fri 10/21:50 pm -
1 stop15h 50m
Deal found 8/19![Icelandair logo]()
$527
This oojo deal was found by Cheapflights users on 8/19. 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 8/19![Icelandair logo]()
$538
This Gotogate deal was found by Cheapflights users on 8/22. 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 8/22![Icelandair logo]()
$544
This Icelandair deal was found by Cheapflights users on 8/20. 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 10/283:35 pm -
1 stop12h 20m
Thu 11/512:50 pm -
1 stop13h 10m
Deal found 8/20![Icelandair logo]()
$545
This Mytrip deal was found by Cheapflights users on 8/21. 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 9/105:50 am -
3 stops30h 40m
Tue 9/159:00 pm -
2 stops28h 59m
Deal found 8/21![Multiple Airlines logo]()
$549
This Kiwi.com deal was found by Cheapflights users on 8/20. 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 10/57:00 pm -
1 stop32h 55m
Mon 10/191:50 pm -
1 stop13h 05m
Deal found 8/20![Icelandair logo]()
$550
This Mytrip deal was found by Cheapflights users on 8/20. 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 stops19h 55m
Mon 10/198:50 am -
2 stops18h 05m
Deal found 8/20![Multiple Airlines logo]()
$655
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 24, 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 24, 2026.
This Mytrip deal was found by Cheapflights users on 8/21. 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 9/105:50 am -
3 stops30h 40m
Tue 9/159:00 pm -
2 stops28h 59m
Deal found 8/21![Multiple Airlines logo]()
$549
This Icelandair deal was found by Cheapflights users on 8/21. 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 8/21![Icelandair logo]()
$580
This United Airlines deal was found by Cheapflights users on 8/21. 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 11/310:50 am -
1 stop13h 05m
Tue 11/1011:15 am -
1 stop19h 34m
Deal found 8/21![United Airlines logo]()
$728
This Expedia deal was found by Cheapflights users on 8/23. 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 Expedia is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Thu 11/266:09 am -
2 stops19h 36m
Wed 12/25:55 pm -
1 stop26h 30m
Deal found 8/23![British Airways logo]()
$762
This Delta deal was found by Cheapflights users on 8/20. 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.
Wed 10/2811:50 am -
2 stops21h 40m
Mon 11/92:45 pm -
1 stop30h 02m
Deal found 8/20![Delta logo]()
$764
This Scandinavian Airlines deal was found by Cheapflights users on 8/19. 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 Scandinavian Airlines is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Fri 10/93:55 pm -
1 stop18h 55m
Thu 10/2210:20 am -
2 stops21h 44m
Deal found 8/19![Scandinavian Airlines logo]()
$789
This Icelandair deal was found by Cheapflights users on 8/21. 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 2/32:35 pm -
1 stop12h 20m
Tue 3/1612:50 pm -
1 stop13h 10m
Deal found 8/21![Icelandair logo]()
$594
This United Airlines deal was found by Cheapflights users on 8/21. 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 10/1311:14 pm -
1 stop23h 01m
Wed 11/187:00 am -
1 stop14h 00m
Deal found 8/21![United Airlines logo]()
$754
This United Airlines deal was found by Cheapflights users on 8/21. 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 2/17:00 am -
1 stop16h 55m
Fri 3/126:45 am -
1 stop15h 15m
Deal found 8/21![United Airlines logo]()
$767
This Mytrip deal was found by Cheapflights users on 8/19. 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.
Tue 12/12:35 pm -
2 stops23h 20m
Tue 12/87:05 am -
2 stops18h 55m
Deal found 8/19![Multiple Airlines logo]()
$923
This United Airlines deal was found by Cheapflights users on 8/21. 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 2/16:50 am -
1 stop16h 15m
Wed 3/177:00 am -
1 stop14h 00m
Deal found 8/21![United Airlines logo]()
$767
This United Airlines deal was found by Cheapflights users on 8/21. 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 1/3111:00 am -
1 stop12h 55m
Tue 3/1610:10 am -
1 stop16h 49m
Deal found 8/21![United Airlines logo]()
$768
This Kiwi.com deal was found by Cheapflights users on 8/20. 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 10/57:10 pm -
1 stop28h 15m
Sun 10/184:20 pm -
2 stops32h 50m
Deal found 8/20![Multiple Airlines logo]()
$949
This United Airlines deal was found by Cheapflights users on 8/20. 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 10/3110:56 pm -
1 stop25h 59m
Sun 11/810:10 am -
1 stop17h 53m
Deal found 8/20![United Airlines logo]()
$772
This Mytrip deal was found by Cheapflights users on 8/22. 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 10/157:00 pm -
3 stops18h 45m
Mon 10/198:50 am -
2 stops18h 05m
Deal found 8/22![Multiple Airlines logo]()
$965
This United Airlines deal was found by Cheapflights users on 8/23. 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 10/203:00 pm -
2 stops20h 00m
Tue 10/2710:10 am -
1 stop16h 53m
Deal found 8/23![United Airlines logo]()
$780
This Mytrip deal was found by Cheapflights users on 8/20. 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 10/167:00 pm -
3 stops18h 35m
Mon 10/267:10 pm -
2 stops29h 45m
Deal found 8/20![Multiple Airlines logo]()
$988
This Mytrip deal was found by Cheapflights users on 8/23. 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.
Tue 9/223:55 pm -
2 stops20h 20m
Tue 9/299:05 am -
2 stops17h 50m
Deal found 8/23![Multiple Airlines logo]()
$1,007
This Kiwi.com deal was found by Cheapflights users on 8/18. 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 9/167:10 pm -
1 stop28h 30m
Wed 9/239:45 pm -
2 stops31h 55m
Deal found 8/18![Multiple Airlines logo]()
$1,009
This Kiwi.com deal was found by Cheapflights users on 8/19. 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.
Fri 10/93:40 pm -
2 stops14h 50m
Thu 10/229:05 pm -
1 stop27h 39m
Deal found 8/19![Multiple Airlines logo]()
$1,009
This Kiwi.com deal was found by Cheapflights users on 8/20. 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 10/197:10 pm -
1 stop28h 15m
Sun 10/256:50 am -
2 stops19h 15m
Deal found 8/20![Multiple Airlines logo]()
$1,019
Last-minute flights from Seattle to BelgiumDiscover last-minute flight deals from Seattle to Belgium. Data last updated August 24, 2026 and is based on user searches.
Discover last-minute flight deals from Seattle to Belgium. Data last updated August 24, 2026 and is based on user searches.
This oojo deal was found by Cheapflights users on 8/19. 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 8/19![Icelandair logo]()
$538
This oojo deal was found by Cheapflights users on 8/20. 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.
Wed 9/23:40 pm -
1 stop12h 15m
Wed 9/91:50 pm -
1 stop30h 55m
Deal found 8/20![Icelandair logo]()
$696
This Kiwi.com deal was found by Cheapflights users on 8/21. 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 9/97:10 pm -
1 stop28h 30m
Tue 9/156:15 pm -
2 stops34h 34m
Deal found 8/21![Multiple Airlines logo]()
$1,203
This Mytrip deal was found by Cheapflights users on 8/21. 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 9/105:50 am -
3 stops30h 40m
Tue 9/159:00 pm -
2 stops28h 59m
Deal found 8/21![Multiple Airlines logo]()
$549
This Kiwi.com deal was found by Cheapflights users on 8/21. 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 9/1011:25 pm -
1 stop28h 30m
Tue 9/1510:00 am -
2 stops35h 02m
Deal found 8/21![Multiple Airlines logo]()
$734
This Kiwi.com deal was found by Cheapflights users on 8/18. 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 9/167:10 pm -
1 stop28h 30m
Wed 9/239:45 pm -
2 stops31h 55m
Deal found 8/18![Multiple Airlines logo]()
$1,009
This Mytrip deal was found by Cheapflights users on 8/22. 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 9/178:00 am -
3 stops28h 30m
Mon 9/218:50 am -
2 stops18h 05m
Deal found 8/22![Multiple Airlines logo]()
$1,144
This Gotogate deal was found by Cheapflights users on 8/23. 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.
Tue 9/226:50 pm -
1 stop19h 20m
Tue 9/299:10 am -
2 stops18h 22m
Deal found 8/23![Multiple Airlines logo]()
$767
This Cheapflightsfares deal was found by Cheapflights users on 8/21. 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.
Tue 9/226:50 pm -
1 stop13h 25m
Tue 10/139:10 am -
2 stops22h 32m
Deal found 8/21![Lufthansa logo]()
$769
This Mytrip deal was found by Cheapflights users on 8/23. 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.
Tue 9/223:55 pm -
2 stops20h 20m
Tue 9/299:05 am -
2 stops17h 50m
Deal found 8/23![Multiple Airlines logo]()
$1,007
This oojo deal was found by Cheapflights users on 8/19. 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 9/263:40 pm -
1 stop12h 15m
Fri 10/21:50 pm -
1 stop15h 50m
Deal found 8/19![Icelandair logo]()
$527
This Mytrip deal was found by Cheapflights users on 8/19. 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 9/273:55 pm -
3 stops33h 20m
Fri 10/22:00 pm -
3 stops32h 45m
Deal found 8/19![Multiple Airlines logo]()
$700
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 24, 2026.
Search for one-way flight options from Seattle to Belgium. Find affordable one-way fares based on user searches. Data last updated August 24, 2026.
This Kiwi.com deal was found by Cheapflights users on 8/23. 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 10/103:55 pm -
2 stops31h 10m
Deal found 8/23![Multiple Airlines logo]()
$242
This oojo deal was found by Cheapflights users on 8/20. 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 2/12:35 pm -
1 stop12h 20m
Deal found 8/20![Icelandair logo]()
$247
This deal was found by Cheapflights users on 8/22. 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 9/203:40 pm -
1 stop12h 15m
Deal found 8/22![Icelandair logo]()
$253
This oojo deal was found by Cheapflights users on 8/21. 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 8/21![Icelandair logo]()
$254
This Booking.com deal was found by Cheapflights users on 8/22. 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 Booking.com is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Sun 9/273:40 pm -
1 stop12h 15m
Deal found 8/22![Icelandair logo]()
$258
This FlightHub deal was found by Cheapflights users on 8/20. 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 8/20![Icelandair logo]()
$259
This Kiwi.com deal was found by Cheapflights users on 8/19. 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 1/302:35 pm -
1 stop12h 20m
Deal found 8/19![Icelandair logo]()
$260
This Kiwi.com deal was found by Cheapflights users on 8/22. 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 9/273:55 pm -
3 stops42h 20m
Deal found 8/22![Multiple Airlines logo]()
$267
This Kiwi.com deal was found by Cheapflights users on 8/23. 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 10/113:55 pm -
2 stops43h 00m
Deal found 8/23![Multiple Airlines logo]()
$276
This Kiwi.com deal was found by Cheapflights users on 8/20. 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 stops27h 20m
Deal found 8/20![Multiple Airlines logo]()
$277
This Kiwi.com deal was found by Cheapflights users on 8/23. 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 8/23![Multiple Airlines logo]()
$278
This Kiwi.com deal was found by Cheapflights users on 8/22. 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 9/273:55 pm -
3 stops57h 00m
Deal found 8/22![Multiple Airlines logo]()
$286
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 24, 2026.
Round-trip from | $510 (oojo) |
|---|---|
One-way from | $242 (Kiwi.com) |
Popular in | June |
Cheapest in | January |
Average price | $811 |
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 August 24, 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 - CRL Charleroi Brussels
SEACRL
Seattle/Tacoma Intl
Thu 9/10
5:50 am-9:30 pm
3 stops30h 40m
Charleroi Brussels
Tue 9/15
9:00 pm-4:59 pm
2 stops28h 59m
$549
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
$580
SeattleBrussels
SEA Seattle/Tacoma Intl - BRU Brussels Bruxelles-National
SEABRU
Seattle/Tacoma Intl
Wed 2/3
2:35 pm-11:55 am
1 stop12h 20m
Brussels Bruxelles-National
Tue 3/16
12:50 pm-6:00 pm
1 stop13h 10m
$594
SeattleBrussels
SEA Seattle/Tacoma Intl - BRU Brussels Bruxelles-National
SEABRU
Seattle/Tacoma Intl
Tue 11/3
10:50 am-8:55 am
1 stop13h 05m
Brussels Bruxelles-National
Tue 11/10
11:15 am-9:49 pm
1 stop19h 34m
$728
SeattleBrussels
SEA Seattle/Tacoma Intl - BRU Brussels Bruxelles-National
SEABRU
Seattle/Tacoma Intl
Tue 10/13
11:14 pm-7:15 am
1 stop23h 01m
Brussels Bruxelles-National
Wed 11/18
7:00 am-12:00 pm
1 stop14h 00m
$754
SeattleBrussels
SEA Seattle/Tacoma Intl - BRU Brussels Bruxelles-National
SEABRU
Seattle/Tacoma Intl
Thu 11/26
6:09 am-10:45 am
2 stops19h 36m
Brussels Bruxelles-National
Wed 12/2
5:55 pm-11:25 am
1 stop26h 30m
$762
SeattleBrussels
SEA Seattle/Tacoma Intl - BRU Brussels Bruxelles-National
SEABRU
Seattle/Tacoma Intl
Wed 10/28
11:50 am-5:30 pm
2 stops21h 40m
Brussels Bruxelles-National
Mon 11/9
2:45 pm-11:47 am
1 stop30h 02m
$764
SeattleBrussels
SEA Seattle/Tacoma Intl - BRU Brussels Bruxelles-National
SEABRU
Seattle/Tacoma Intl
Mon 2/1
7:00 am-8:55 am
1 stop16h 55m
Brussels Bruxelles-National
Fri 3/12
6:45 am-1:00 pm
1 stop15h 15m
$767
SeattleBrussels
SEA Seattle/Tacoma Intl - BRU Brussels Bruxelles-National
SEABRU
Seattle/Tacoma Intl
Mon 2/1
6:50 am-8:05 am
1 stop16h 15m
Brussels Bruxelles-National
Wed 3/17
7:00 am-1:00 pm
1 stop14h 00m
$767
SeattleBrussels
SEA Seattle/Tacoma Intl - BRU Brussels Bruxelles-National
SEABRU
Seattle/Tacoma Intl
Sun 1/31
11:00 am-8:55 am
1 stop12h 55m
Brussels Bruxelles-National
Tue 3/16
10:10 am-6:59 pm
1 stop16h 49m
$768
Showing 1-10 of 36 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 24, 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
Entertainment
7.2
Comfort
7.7
Crew
8.4
Boarding
7.8
Food
7.3
Reviews
1 / 20
4.0
OkayAbhisek,Aug 2026
JFK - AMS
Overall
7.8
Entertainment
7.2
Comfort
7.7
Crew
8.4
Boarding
7.8
Food
7.3
Reviews
1 / 20
4.0
OkayAbhisek,Aug 2026
JFK - AMS
Overall
7.8
Entertainment
7.2
Comfort
7.7
Crew
8.4
Boarding
7.8
Food
7.3
Reviews
1 / 20
4.0
OkayAbhisek,Aug 2026
JFK - AMS
Overall
7.8
Entertainment
7.2
Comfort
7.7
Crew
8.4
Boarding
7.8
Food
7.3
Reviews
1 / 20
4.0
OkayAbhisek,Aug 2026
JFK - AMS
Overall
7.8
Entertainment
7.2
Comfort
7.7
Crew
8.4
Boarding
7.8
Food
7.3
Reviews
1 / 20
4.0
OkayAbhisek,Aug 2026
JFK - AMS
Overall
7.8
Entertainment
7.2
Comfort
7.7
Crew
8.4
Boarding
7.8
Food
7.3
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 24, 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 August 24, 2026.
| Airline | Cheapest | Average | Flexibility | On-time |
|---|---|---|---|---|
| Cheapest$382 | Average$559 | 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$744 | FlexibilityNo cancel fee | On-time76% | |
| Cheapest$502 | Average$789 | FlexibilityNo cancel fee | On-time69% | |
| Cheapest$509 | Average$805 | FlexibilityNo cancel fee | On-timeN/A |