$238+ 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 9 — Sep 161
Round-trip
1 adult, Economy
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Find cheap flights from Seattle to Belgium with Cheapflights
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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 10, 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 10, 2026.
This Justfly.com deal was found by Cheapflights users on 8/7. 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 12/22:35 pm -
1 stop12h 20m
Sun 12/1312:50 pm -
1 stop13h 10m
Deal found 8/7![Icelandair logo]()
$557
This Cheapflightsfares deal was found by Cheapflights users on 8/7. 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 8/7![Icelandair logo]()
$560
This deal was found by Cheapflights users on 8/9. 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
Mon 10/121:50 pm -
1 stop13h 05m
Deal found 8/9![Icelandair logo]()
$562
This oojo deal was found by Cheapflights users on 8/7. 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 stop13h 05m
Deal found 8/7![Icelandair logo]()
$563
This oojo deal was found by Cheapflights users on 8/9. 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
Sun 10/181:50 pm -
1 stop15h 50m
Deal found 8/9![Icelandair logo]()
$564
This oojo deal was found by Cheapflights users on 8/5. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure oojo is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Sun 9/273:40 pm -
1 stop12h 15m
Sat 10/31:50 pm -
1 stop13h 05m
Deal found 8/5![Icelandair logo]()
$565
This deal was found by Cheapflights users on 8/9. 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.
Fri 9/253:40 pm -
1 stop12h 15m
Fri 10/91:50 pm -
1 stop13h 05m
Deal found 8/9![Icelandair logo]()
$567
This deal was found by Cheapflights users on 8/9. 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.
Fri 9/253:40 pm -
1 stop12h 15m
Sun 10/111:50 pm -
1 stop15h 50m
Deal found 8/9![Icelandair logo]()
$568
This deal was found by Cheapflights users on 8/9. 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 9/273:40 pm -
1 stop12h 15m
Fri 10/91:50 pm -
1 stop15h 50m
Deal found 8/9![Icelandair logo]()
$569
This deal was found by Cheapflights users on 8/9. 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 9/273:40 pm -
1 stop12h 15m
Sun 10/111:50 pm -
1 stop15h 50m
Deal found 8/9![Icelandair logo]()
$570
This Justfly.com deal was found by Cheapflights users on 8/5. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Justfly.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
Sun 10/41:50 pm -
1 stop13h 05m
Deal found 8/5![Icelandair logo]()
$574
This FlightHub deal was found by Cheapflights users on 8/9. 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.
Mon 9/287:00 pm -
1 stop32h 55m
Mon 10/191:50 pm -
1 stop13h 05m
Deal found 8/9![Icelandair logo]()
$575
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 10, 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 10, 2026.
This Icelandair deal was found by Cheapflights users on 8/8. 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.
Sun 10/43:40 pm -
1 stop12h 15m
Thu 10/81:50 pm -
1 stop15h 50m
Deal found 8/8![Icelandair logo]()
$589
This Mytrip deal was found by Cheapflights users on 8/8. 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 10/810:30 am -
3 stops26h 00m
Wed 10/149:45 pm -
3 stops29h 47m
Deal found 8/8![Multiple Airlines logo]()
$688
This United Airlines deal was found by Cheapflights users on 8/9. 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 11/312:45 pm -
2 stops35h 05m
Tue 11/1010:10 am -
1 stop22h 07m
Deal found 8/9![United Airlines logo]()
$724
This Delta deal was found by Cheapflights users on 8/9. 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 9/228:59 am -
1 stop13h 41m
Tue 10/138:05 am -
1 stop17h 30m
Deal found 8/9![Delta logo]()
$785
This KLM deal was found by Cheapflights users on 8/6. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure KLM is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Tue 11/1011:45 am -
1 stop14h 15m
Sun 11/296:10 am -
1 stop14h 37m
Deal found 8/6![KLM logo]()
$815
This United Airlines deal was found by Cheapflights users on 8/7. 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 11/305:05 am -
2 stops23h 10m
Sat 12/127:00 am -
1 stop14h 00m
Deal found 8/7![United Airlines logo]()
$726
This Delta deal was found by Cheapflights users on 8/6. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Delta is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Wed 9/27:15 am -
2 stops22h 25m
Wed 9/910:25 am -
1 stop15h 10m
Deal found 8/6![Delta logo]()
$794
This United Airlines deal was found by Cheapflights users on 8/7. 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 12/17:00 am -
1 stop16h 55m
Mon 12/147:00 am -
1 stop14h 00m
Deal found 8/7![United Airlines logo]()
$730
This United deal was found by Cheapflights users on 8/7. 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.
Mon 9/213:54 pm -
2 stops19h 06m
Sun 10/49:10 am -
2 stops22h 32m
Deal found 8/7![Multiple Airlines logo]()
$832
This United Airlines deal was found by Cheapflights users on 8/9. 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 12/116:50 am -
1 stop16h 15m
Tue 12/2210:10 am -
1 stop17h 51m
Deal found 8/9![United Airlines logo]()
$733
This Mytrip deal was found by Cheapflights users on 8/6. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Mytrip is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Fri 10/163:40 pm -
3 stops21h 55m
Wed 10/219:20 am -
3 stops42h 25m
Deal found 8/6![Multiple Airlines logo]()
$892
This United Airlines deal was found by Cheapflights users on 8/9. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure United Airlines is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Wed 9/307:00 am -
2 stops21h 15m
Wed 10/216:20 am -
1 stop15h 00m
Deal found 8/9![United Airlines logo]()
$781
This Mytrip deal was found by Cheapflights users on 8/8. 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 10/33:40 pm -
2 stops21h 00m
Fri 10/168:45 am -
2 stops20h 55m
Deal found 8/8![Multiple Airlines logo]()
$969
This Kiwi.com deal was found by Cheapflights users on 8/8. 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 9/277:10 pm -
1 stop17h 15m
Sun 10/49:05 am -
2 stops20h 35m
Deal found 8/8![Multiple Airlines logo]()
$971
This Mytrip deal was found by Cheapflights users on 8/5. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Mytrip is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Thu 10/227:00 pm -
3 stops18h 45m
Mon 10/269:45 am -
2 stops34h 40m
Deal found 8/5![Multiple Airlines logo]()
$990
This Mytrip deal was found by Cheapflights users on 8/7. 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 9/218:00 am -
3 stops27h 35m
Sun 10/49:05 am -
2 stops20h 35m
Deal found 8/7![Multiple Airlines logo]()
$997
This Kiwi.com deal was found by Cheapflights users on 8/5. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Kiwi.com is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Sun 9/277:10 pm -
1 stop17h 15m
Sat 10/310:30 am -
2 stops19h 10m
Deal found 8/5![Multiple Airlines logo]()
$1,007
This Mytrip deal was found by Cheapflights users on 8/8. 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 9/182:10 pm -
2 stops21h 15m
Sat 10/310:30 am -
2 stops19h 10m
Deal found 8/8![Multiple Airlines logo]()
$1,014
This Mytrip deal was found by Cheapflights users on 8/5. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Mytrip is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Sat 9/263:40 pm -
2 stops21h 00m
Sat 10/310:30 am -
2 stops19h 10m
Deal found 8/5![Multiple Airlines logo]()
$1,028
This Mytrip deal was found by Cheapflights users on 8/5. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Mytrip is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Tue 9/156:50 pm -
2 stops17h 25m
Thu 9/248:00 am -
2 stops21h 40m
Deal found 8/5![Multiple Airlines logo]()
$1,052
Last-minute flights from Seattle to BelgiumDiscover last-minute flight deals from Seattle to Belgium. Data last updated August 10, 2026 and is based on user searches.
Discover last-minute flight deals from Seattle to Belgium. Data last updated August 10, 2026 and is based on user searches.
This Mytrip deal was found by Cheapflights users on 8/7. 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 8/258:00 am -
2 stops28h 15m
Sat 9/58:55 pm -
2 stops29h 04m
Deal found 8/7![Multiple Airlines logo]()
$650
This Gotogate deal was found by Cheapflights users on 8/7. 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 8/7![Icelandair logo]()
$560
This Gotogate deal was found by Cheapflights users on 8/10. 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.
Thu 9/247:00 pm -
1 stop32h 55m
Thu 10/11:50 pm -
1 stop13h 05m
Deal found 8/10![Icelandair logo]()
$580
This deal was found by Cheapflights users on 8/9. 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.
Fri 9/253:40 pm -
1 stop12h 15m
Mon 10/121:50 pm -
1 stop13h 05m
Deal found 8/9![Icelandair logo]()
$567
This deal was found by Cheapflights users on 8/9. 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.
Fri 9/253:40 pm -
1 stop12h 15m
Sun 10/111:50 pm -
1 stop15h 50m
Deal found 8/9![Icelandair logo]()
$568
This oojo deal was found by Cheapflights users on 8/5. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure oojo is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Sun 9/273:40 pm -
1 stop12h 15m
Sat 10/31:50 pm -
1 stop13h 05m
Deal found 8/5![Icelandair logo]()
$565
This deal was found by Cheapflights users on 8/9. 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 9/273:40 pm -
1 stop12h 15m
Fri 10/91:50 pm -
1 stop15h 50m
Deal found 8/9![Icelandair logo]()
$569
This deal was found by Cheapflights users on 8/6. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Sun 9/273:40 pm -
1 stop12h 15m
Sun 10/41:50 pm -
1 stop15h 50m
Deal found 8/6![Icelandair logo]()
$570
This FlightHub deal was found by Cheapflights users on 8/9. 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.
Mon 9/287:00 pm -
1 stop32h 55m
Mon 10/191:50 pm -
1 stop13h 05m
Deal found 8/9![Icelandair logo]()
$575
This oojo deal was found by Cheapflights users on 8/9. 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 8/9![Icelandair logo]()
$564
This deal was found by Cheapflights users on 8/9. 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
Mon 10/121:50 pm -
1 stop13h 05m
Deal found 8/9![Icelandair logo]()
$562
This Icelandair deal was found by Cheapflights users on 8/9. 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 8/9![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 10, 2026.
Search for one-way flight options from Seattle to Belgium. Find affordable one-way fares based on user searches. Data last updated August 10, 2026.
This oojo deal was found by Cheapflights users on 8/5. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure 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 8/5![Icelandair logo]()
$238
This Icelandair deal was found by Cheapflights users on 8/6. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Icelandair is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Wed 8/267:00 pm -
1 stop32h 55m
Deal found 8/6![Icelandair logo]()
$273
This oojo deal was found by Cheapflights users on 8/8. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure oojo is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Sun 9/63:40 pm -
1 stop12h 15m
Deal found 8/8![Icelandair logo]()
$308
This oojo deal was found by Cheapflights users on 8/7. 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.
Thu 9/37:00 pm -
1 stop32h 55m
Deal found 8/7![Icelandair logo]()
$312
This FlightHub deal was found by Cheapflights users on 8/8. 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.
Wed 9/23:40 pm -
1 stop12h 15m
Deal found 8/8![Icelandair logo]()
$323
This FlightHub deal was found by Cheapflights users on 8/8. 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 9/411:25 pm -
1 stop28h 30m
Deal found 8/8![Icelandair logo]()
$325
This Kiwi.com deal was found by Cheapflights users on 8/6. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Kiwi.com is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Sat 9/193:40 pm -
2 stops31h 10m
Deal found 8/6![Multiple Airlines logo]()
$356
This Kiwi.com deal was found by Cheapflights users on 8/8. 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 9/411:25 pm -
2 stops48h 50m
Deal found 8/8![Multiple Airlines logo]()
$359
This Kiwi.com deal was found by Cheapflights users on 8/8. 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 9/67:00 pm -
2 stops40h 35m
Deal found 8/8![Multiple Airlines logo]()
$365
This Kiwi.com deal was found by Cheapflights users on 8/6. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Kiwi.com is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Sat 9/197:52 am -
3 stops39h 18m
Deal found 8/6![Multiple Airlines logo]()
$386
This Kiwi.com deal was found by Cheapflights users on 8/8. 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 9/211:25 pm -
2 stops37h 05m
Deal found 8/8![Multiple Airlines logo]()
$389
This Mytrip deal was found by Cheapflights users on 8/8. 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 9/38:00 am -
2 stops28h 30m
Deal found 8/8![Multiple Airlines logo]()
$410
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 10, 2026.
Round-trip from | $557 (Justfly.com) |
|---|---|
One-way from | $238 (oojo) |
Popular in | June |
Cheapest in | January |
Average price | $648 |
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 10, 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
Sun 10/4
3:40 pm-12:55 pm
1 stop12h 15m
Brussels Bruxelles-National
Thu 10/8
1:50 pm-8:40 pm
1 stop15h 50m
$589
SeattleBrussels
SEA Seattle/Tacoma Intl - CRL Charleroi Brussels
SEACRL
Seattle/Tacoma Intl
Thu 10/8
10:30 am-9:30 pm
3 stops26h 00m
Charleroi Brussels
Wed 10/14
9:45 pm-6:32 pm
3 stops29h 47m
$688
SeattleBrussels
SEA Seattle/Tacoma Intl - BRU Brussels Bruxelles-National
SEABRU
Seattle/Tacoma Intl
Tue 11/3
12:45 pm-8:50 am
2 stops35h 05m
Brussels Bruxelles-National
Tue 11/10
10:10 am-11:17 pm
1 stop22h 07m
$724
SeattleBrussels
SEA Seattle/Tacoma Intl - BRU Brussels Bruxelles-National
SEABRU
Seattle/Tacoma Intl
Mon 11/30
5:05 am-1:15 pm
2 stops23h 10m
Brussels Bruxelles-National
Sat 12/12
7:00 am-12:00 pm
1 stop14h 00m
$726
SeattleBrussels
SEA Seattle/Tacoma Intl - BRU Brussels Bruxelles-National
SEABRU
Seattle/Tacoma Intl
Tue 12/1
7:00 am-8:55 am
1 stop16h 55m
Brussels Bruxelles-National
Mon 12/14
7:00 am-12:00 pm
1 stop14h 00m
$730
SeattleBrussels
SEA Seattle/Tacoma Intl - BRU Brussels Bruxelles-National
SEABRU
Seattle/Tacoma Intl
Fri 12/11
6:50 am-8:05 am
1 stop16h 15m
Brussels Bruxelles-National
Tue 12/22
10:10 am-7:01 pm
1 stop17h 51m
$733
SeattleBrussels
SEA Seattle/Tacoma Intl - BRU Brussels Bruxelles-National
SEABRU
Seattle/Tacoma Intl
Wed 9/30
7:00 am-1:15 pm
2 stops21h 15m
Brussels Bruxelles-National
Wed 10/21
6:20 am-12:20 pm
1 stop15h 00m
$781
SeattleBrussels
SEA Seattle/Tacoma Intl - BRU Brussels Bruxelles-National
SEABRU
Seattle/Tacoma Intl
Tue 9/22
8:59 am-7:40 am
1 stop13h 41m
Brussels Bruxelles-National
Tue 10/13
8:05 am-4:35 pm
1 stop17h 30m
$785
SeattleBrussels
SEA Seattle/Tacoma Intl - BRU Brussels Bruxelles-National
SEABRU
Seattle/Tacoma Intl
Wed 9/2
7:15 am-2:40 pm
2 stops22h 25m
Brussels Bruxelles-National
Wed 9/9
10:25 am-4:35 pm
1 stop15h 10m
$794
SeattleBrussels
SEA Seattle/Tacoma Intl - BRU Brussels Bruxelles-National
SEABRU
Seattle/Tacoma Intl
Tue 11/10
11:45 am-11:00 am
1 stop14h 15m
Brussels Bruxelles-National
Sun 11/29
6:10 am-11:47 am
1 stop14h 37m
$815
Showing 1-10 of 31 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 71 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 10, 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.
Comfort
7.7
Food
7.3
Crew
8.4
Boarding
7.8
Overall
7.8
Entertainment
7.2
Reviews
1 / 20
6.0
GoodAnonymous,Apr 2026
OKC - ATL
Comfort
7.7
Food
7.3
Crew
8.4
Boarding
7.8
Overall
7.8
Entertainment
7.2
Reviews
1 / 20
6.0
GoodAnonymous,Apr 2026
OKC - ATL
Comfort
7.7
Food
7.3
Crew
8.4
Boarding
7.8
Overall
7.8
Entertainment
7.2
Reviews
1 / 20
6.0
GoodAnonymous,Apr 2026
OKC - ATL
Comfort
7.7
Food
7.3
Crew
8.4
Boarding
7.8
Overall
7.8
Entertainment
7.2
Reviews
1 / 20
6.0
GoodAnonymous,Apr 2026
OKC - ATL
Comfort
7.7
Food
7.3
Crew
8.4
Boarding
7.8
Overall
7.8
Entertainment
7.2
Reviews
1 / 20
6.0
GoodAnonymous,Apr 2026
OKC - ATL
Comfort
7.7
Food
7.3
Crew
8.4
Boarding
7.8
Overall
7.8
Entertainment
7.2
Reviews
1 / 20
6.0
GoodAnonymous,Apr 2026
OKC - ATL
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 10, 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 10, 2026.
| Airline | Cheapest | Average | Flexibility | On-time |
|---|---|---|---|---|
| Cheapest$382 | Average$557 | FlexibilityNo cancel fee | On-time76% | |
| Cheapest$421 | Average$624 | FlexibilityNo cancel fee | On-time70% | |
| Cheapest$481 | Average$640 | FlexibilityNo cancel fee | On-time75% | |
| Cheapest$494 | Average$695 | FlexibilityNo cancel fee | On-time76% | |
| Cheapest$502 | Average$773 | FlexibilityNo cancel fee | On-time69% | |
| Cheapest$509 | Average$759 | FlexibilityNo cancel fee | On-timeN/A |