$239+ 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 3 — Sep 101
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 4, 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 4, 2026.
This Expedia deal was found by Cheapflights users on 7/30. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Expedia is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Thu 11/58:18 am -
2 stops16h 17m
Fri 11/1310:15 am -
2 stops18h 29m
Deal found 7/30![Multiple Airlines logo]()
$524
This Mytrip deal was found by Cheapflights users on 7/30. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Mytrip is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Sun 10/183:40 pm -
1 stop12h 15m
Thu 10/221:50 pm -
1 stop15h 50m
Deal found 7/30![Icelandair logo]()
$556
This oojo deal was found by Cheapflights users on 7/30. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure oojo is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Wed 10/143:40 pm -
1 stop12h 15m
Mon 10/191:50 pm -
1 stop13h 05m
Deal found 7/30![Icelandair logo]()
$557
This Vliegwinkel deal was found by Cheapflights users on 7/30. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Vliegwinkel 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 7/30![Icelandair logo]()
$558
This Cheapflightsfares deal was found by Cheapflights users on 7/30. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure 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 7/30![Icelandair logo]()
$559
This oojo deal was found by Cheapflights users on 7/30. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure 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 7/30![Icelandair logo]()
$561
This oojo deal was found by Cheapflights users on 7/30. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure oojo is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Mon 9/287:00 pm -
1 stop32h 55m
Fri 10/91:50 pm -
1 stop15h 50m
Deal found 7/30![Icelandair logo]()
$565
This Justfly.com deal was found by Cheapflights users on 8/3. 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 10/43:40 pm -
1 stop12h 15m
Sun 10/111:50 pm -
1 stop15h 50m
Deal found 8/3![Icelandair logo]()
$566
This FlightHub deal was found by Cheapflights users on 7/30. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure FlightHub is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Tue 9/297:00 pm -
1 stop32h 55m
Thu 10/81:50 pm -
1 stop15h 50m
Deal found 7/30![Icelandair logo]()
$567
This Justfly.com deal was found by Cheapflights users on 8/3. 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 10/57:00 pm -
1 stop32h 55m
Sun 10/111:50 pm -
1 stop15h 50m
Deal found 8/3![Icelandair logo]()
$568
This Mytrip deal was found by Cheapflights users on 7/30. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Mytrip is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Mon 9/213:40 pm -
2 stops19h 55m
Sun 10/49:05 am -
2 stops20h 35m
Deal found 7/30![Multiple Airlines logo]()
$781
This Kiwi.com deal was found by Cheapflights users on 7/30. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure 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
Fri 10/99:50 am -
2 stops17h 55m
Deal found 7/30![Multiple Airlines logo]()
$965
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 4, 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 4, 2026.
This Icelandair deal was found by Cheapflights users on 8/3. 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 8/3![Icelandair logo]()
$589
This United Airlines deal was found by Cheapflights users on 8/2. 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 stops15h 30m
Tue 11/1010:10 am -
1 stop17h 53m
Deal found 8/2![United Airlines logo]()
$723
This Delta deal was found by Cheapflights users on 8/4. 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 11/36:00 am -
1 stop20h 00m
Tue 11/108:05 am -
1 stop12h 42m
Deal found 8/4![Delta logo]()
$725
This Mytrip deal was found by Cheapflights users on 7/30. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Mytrip is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Mon 9/213:40 pm -
2 stops19h 55m
Sun 10/49:05 am -
2 stops20h 35m
Deal found 7/30![Multiple Airlines logo]()
$781
This Icelandair deal was found by Cheapflights users on 8/3. 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 10/73:40 pm -
1 stop12h 15m
Sun 10/111:50 pm -
1 stop15h 50m
Deal found 8/3![Icelandair logo]()
$589
This Icelandair deal was found by Cheapflights users on 7/30. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Icelandair is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Fri 9/253:40 pm -
1 stop12h 15m
Wed 10/71:50 pm -
1 stop13h 05m
Deal found 7/30![Icelandair logo]()
$596
This United Airlines deal was found by Cheapflights users on 8/3. 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 10/53:00 pm -
2 stops20h 00m
Wed 10/146:45 am -
1 stop19h 14m
Deal found 8/3![United Airlines logo]()
$777
This Icelandair deal was found by Cheapflights users on 7/30. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Icelandair is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Thu 10/17:00 pm -
1 stop32h 55m
Fri 10/91:50 pm -
1 stop15h 50m
Deal found 7/30![Icelandair logo]()
$708
This United Airlines deal was found by Cheapflights users on 7/30. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure United Airlines is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Tue 9/297:11 am -
2 stops21h 04m
Fri 10/912:45 pm -
1 stop13h 14m
Deal found 7/30![United Airlines logo]()
$781
This United Airlines deal was found by Cheapflights users on 7/30. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure United Airlines is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Mon 9/287:11 am -
2 stops21h 04m
Thu 10/89:35 am -
1 stop16h 24m
Deal found 7/30![United Airlines logo]()
$781
This Icelandair deal was found by Cheapflights users on 8/3. 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.
Mon 10/57:00 pm -
1 stop32h 55m
Sat 10/101:50 pm -
1 stop15h 50m
Deal found 8/3![Icelandair logo]()
$743
This Mytrip deal was found by Cheapflights users on 8/1. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Mytrip is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Sun 11/88:40 am -
3 stops27h 10m
Sat 11/143:35 pm -
2 stops29h 25m
Deal found 8/1![Multiple Airlines logo]()
$1,020
This Mytrip deal was found by Cheapflights users on 8/3. 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 9/17:00 pm -
2 stops17h 15m
Thu 9/178:00 am -
2 stops21h 40m
Deal found 8/3![Multiple Airlines logo]()
$1,039
This Mytrip deal was found by Cheapflights users on 8/1. 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 8/227:00 am -
3 stops23h 35m
Mon 8/318:50 am -
2 stops20h 50m
Deal found 8/1![Multiple Airlines logo]()
$1,041
This Mytrip deal was found by Cheapflights users on 8/4. 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 8/233:40 pm -
3 stops22h 15m
Sun 9/69:05 am -
2 stops35h 40m
Deal found 8/4![Multiple Airlines logo]()
$1,118
This Mytrip deal was found by Cheapflights users on 8/2. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Mytrip is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Sun 11/18:40 am -
3 stops28h 55m
Sun 11/87:30 am -
2 stops18h 30m
Deal found 8/2![Multiple Airlines logo]()
$1,125
This Mytrip deal was found by Cheapflights users on 8/4. 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
Sat 9/197:55 am -
2 stops21h 45m
Deal found 8/4![Multiple Airlines logo]()
$1,187
Last-minute flights from Seattle to BelgiumDiscover last-minute flight deals from Seattle to Belgium. Data last updated August 4, 2026 and is based on user searches.
Discover last-minute flight deals from Seattle to Belgium. Data last updated August 4, 2026 and is based on user searches.
This Gotogate deal was found by Cheapflights users on 8/3. 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 9/111:25 pm -
1 stop28h 30m
Thu 9/171:50 pm -
1 stop15h 50m
Deal found 8/3![Icelandair logo]()
$576
This oojo deal was found by Cheapflights users on 8/3. 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 9/57:00 pm -
1 stop32h 55m
Fri 9/111:50 pm -
1 stop15h 50m
Deal found 8/3![Icelandair logo]()
$579
This Vliegwinkel deal was found by Cheapflights users on 7/30. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Vliegwinkel 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 7/30![Icelandair logo]()
$558
This Mytrip deal was found by Cheapflights users on 7/30. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Mytrip is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Mon 9/213:40 pm -
2 stops19h 55m
Sun 10/49:05 am -
2 stops20h 35m
Deal found 7/30![Multiple Airlines logo]()
$781
This FlightHub deal was found by Cheapflights users on 7/30. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure FlightHub is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Sun 9/273:40 pm -
1 stop12h 15m
Thu 10/81:50 pm -
1 stop15h 50m
Deal found 7/30![Icelandair logo]()
$573
This Kiwi.com deal was found by Cheapflights users on 7/30. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure 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
Fri 10/99:50 am -
2 stops17h 55m
Deal found 7/30![Multiple Airlines logo]()
$965
This oojo deal was found by Cheapflights users on 7/30. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure oojo is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Mon 9/287:00 pm -
1 stop32h 55m
Fri 10/91:50 pm -
1 stop15h 50m
Deal found 7/30![Icelandair logo]()
$565
This FlightHub deal was found by Cheapflights users on 7/30. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure 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
Thu 10/81:50 pm -
1 stop15h 50m
Deal found 7/30![Icelandair logo]()
$574
This FlightHub deal was found by Cheapflights users on 7/30. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure FlightHub is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Tue 9/297:00 pm -
1 stop32h 55m
Thu 10/81:50 pm -
1 stop15h 50m
Deal found 7/30![Icelandair logo]()
$567
This Icelandair deal was found by Cheapflights users on 7/30. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Icelandair is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Tue 9/297:00 pm -
1 stop32h 55m
Wed 10/71:50 pm -
1 stop13h 05m
Deal found 7/30![Icelandair logo]()
$590
This Kiwi.com deal was found by Cheapflights users on 7/30. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Kiwi.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
Mon 10/121:50 pm -
1 stop13h 05m
Deal found 7/30![Icelandair logo]()
$587
This Icelandair deal was found by Cheapflights users on 7/30. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure 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
Fri 10/91:50 pm -
1 stop13h 05m
Deal found 7/30![Icelandair logo]()
$588
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 4, 2026.
Search for one-way flight options from Seattle to Belgium. Find affordable one-way fares based on user searches. Data last updated August 4, 2026.
This oojo deal was found by Cheapflights users on 7/30. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure 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 7/30![Icelandair logo]()
$239
This Mytrip deal was found by Cheapflights users on 7/30. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Mytrip is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Mon 8/3111:25 pm -
1 stop28h 30m
Deal found 7/30![Icelandair logo]()
$245
This Kiwi.com deal was found by Cheapflights users on 7/30. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Kiwi.com is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Sun 9/63:40 pm -
2 stops31h 30m
Deal found 7/30![Multiple Airlines logo]()
$250
This FlightHub deal was found by Cheapflights users on 8/3. 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 10/73:40 pm -
1 stop12h 15m
Deal found 8/3![Icelandair logo]()
$251
This FlightHub deal was found by Cheapflights users on 8/3. 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 10/57:00 pm -
1 stop32h 55m
Deal found 8/3![Icelandair logo]()
$253
This Kiwi.com deal was found by Cheapflights users on 7/30. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Kiwi.com is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Sun 9/63:40 pm -
2 stops41h 10m
Deal found 7/30![Multiple Airlines logo]()
$254
This Kiwi.com deal was found by Cheapflights users on 8/3. 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 10/33:40 pm -
1 stop12h 15m
Deal found 8/3![Icelandair logo]()
$261
This Kiwi.com deal was found by Cheapflights users on 8/3. 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 10/53:40 pm -
3 stops33h 15m
Deal found 8/3![Multiple Airlines logo]()
$263
This Kiwi.com deal was found by Cheapflights users on 7/31. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Kiwi.com is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Mon 11/22:35 pm -
1 stop12h 20m
Deal found 7/31![Icelandair logo]()
$264
This Kiwi.com deal was found by Cheapflights users on 7/30. Clicking the “Pick Dates” button in this card will allow you to select your dates and further customize your flight criteria. From there, click “Find deals”, make sure Kiwi.com is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Mon 9/73:40 pm -
2 stops32h 10m
Deal found 7/30![Multiple Airlines logo]()
$265
This Kiwi.com deal was found by Cheapflights users on 8/3. 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 -
3 stops28h 25m
Deal found 8/3![Multiple Airlines logo]()
$268
This Kiwi.com deal was found by Cheapflights users on 8/3. 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 10/47:00 pm -
3 stops29h 30m
Deal found 8/3![Multiple Airlines logo]()
$271
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 4, 2026.
Round-trip from | $524 (Expedia) |
|---|---|
One-way from | $239 (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 4, 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 - BRU
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 - BRU
SEABRU
Seattle/Tacoma Intl
Wed 10/7
3:40 pm-12:55 pm
1 stop12h 15m
Brussels Bruxelles-National
Sun 10/11
1:50 pm-8:40 pm
1 stop15h 50m
$589
Quickest round-trip
SeattleBrussels
SEA - BRU
SEABRU
Seattle/Tacoma Intl
Fri 9/25
3:40 pm-12:55 pm
1 stop12h 15m
Brussels Bruxelles-National
Wed 10/7
1:50 pm-5:55 pm
1 stop13h 05m
$596
SeattleBrussels
SEA - BRU
SEABRU
Seattle/Tacoma Intl
Thu 10/1
7:00 pm-12:55 pm
1 stop32h 55m
Brussels Bruxelles-National
Fri 10/9
1:50 pm-8:40 pm
1 stop15h 50m
$708
SeattleBrussels
SEA - BRU
SEABRU
Seattle/Tacoma Intl
Tue 11/3
12:45 pm-1:15 pm
2 stops15h 30m
Brussels Bruxelles-National
Tue 11/10
10:10 am-7:03 pm
1 stop17h 53m
$723
SeattleBrussels
SEA - BRU
SEABRU
Seattle/Tacoma Intl
Tue 11/3
6:00 am-11:00 am
1 stop20h 00m
Brussels Bruxelles-National
Tue 11/10
8:05 am-11:47 am
1 stop12h 42m
$725
SeattleBrussels
SEA - BRU
SEABRU
Seattle/Tacoma Intl
Mon 10/5
7:00 pm-12:55 pm
1 stop32h 55m
Brussels Bruxelles-National
Sat 10/10
1:50 pm-8:40 pm
1 stop15h 50m
$743
SeattleBrussels
SEA - BRU
SEABRU
Seattle/Tacoma Intl
Mon 10/5
3:00 pm-8:00 pm
2 stops20h 00m
Brussels Bruxelles-National
Wed 10/14
6:45 am-4:59 pm
1 stop19h 14m
$777
SeattleBrussels
SEA - CRL
SEACRL
Seattle/Tacoma Intl
Mon 9/21
3:40 pm-8:35 pm
2 stops19h 55m
Charleroi Brussels
Sun 10/4
9:05 am-8:40 pm
2 stops20h 35m
$781
SeattleBrussels
SEA - BRU
SEABRU
Seattle/Tacoma Intl
Tue 9/29
7:11 am-1:15 pm
2 stops21h 04m
Brussels Bruxelles-National
Fri 10/9
12:45 pm-4:59 pm
1 stop13h 14m
$781
Showing 1-10 of 32 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 4, 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
Crew
8.4
Food
7.3
Overall
7.8
Entertainment
7.2
Boarding
7.8
Reviews
1 / 20
6.0
GoodAnonymous,Apr 2026
OKC - ATL
Comfort
7.7
Crew
8.4
Food
7.3
Overall
7.8
Entertainment
7.2
Boarding
7.8
Reviews
1 / 20
6.0
GoodAnonymous,Apr 2026
OKC - ATL
Comfort
7.7
Crew
8.4
Food
7.3
Overall
7.8
Entertainment
7.2
Boarding
7.8
Reviews
1 / 20
6.0
GoodAnonymous,Apr 2026
OKC - ATL
Comfort
7.7
Crew
8.4
Food
7.3
Overall
7.8
Entertainment
7.2
Boarding
7.8
Reviews
1 / 20
6.0
GoodAnonymous,Apr 2026
OKC - ATL
Comfort
7.7
Crew
8.4
Food
7.3
Overall
7.8
Entertainment
7.2
Boarding
7.8
Reviews
1 / 20
6.0
GoodAnonymous,Apr 2026
OKC - ATL
Comfort
7.7
Crew
8.4
Food
7.3
Overall
7.8
Entertainment
7.2
Boarding
7.8
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 4, 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 4, 2026.
| Airline | Cheapest | Average | Flexibility | On-time |
|---|---|---|---|---|
| Cheapest$382 | Average$556 | FlexibilityNo cancel fee | On-time76% | |
| Cheapest$421 | Average$621 | FlexibilityNo cancel fee | On-time70% | |
| Cheapest$481 | Average$680 | 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 |