$230+ 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
Jul 6 — Jul 131
Round-trip
1 adult, Economy
We work with more than 300 partners to bring you better travel deals
Find cheap flights from Seattle to Belgium with Cheapflights
1. Tell us where you want to go
Enter your travel information like dates, passengers, trip type (one-way or round trip), and preferred cabin class then click “Find deals”2. Select your favorite providers
We find the providers serving your travel needs. Choose up to four travel providers to compare side-by-side for flights, hotels, or car rentals.3. Compare prices and book
Review each provider’s pricing and select the best option for you! Book through your favorite provider’s website for a seamless experience.Cheap flight deals from Seattle to Belgium
Cheapest
Best
Last-minute
One-way
Cheapest flights from Seattle to BelgiumExplore the most affordable flight options available from Seattle to Belgium. Find the lowest fares from popular airlines and budget airlines, with prices last updated on June 6, 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 June 6, 2026.
This oojo deal was found by Cheapflights users on 6/2. 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 oojo is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Sun 10/43:40 pm
SEA
- BRU
1 stop12h 15m
Icelandair
Mon 10/191:50 pm
BRU
- SEA
1 stop13h 05m
Icelandair
Deal found 6/2![Icelandair logo]()
$520
This oojo deal was found by Cheapflights users on 6/4. 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 oojo is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Sun 10/183:40 pm
SEA
- BRU
1 stop12h 15m
Icelandair
Thu 10/2912:50 pm
BRU
- SEA
1 stop13h 10m
Icelandair
Deal found 6/4![Icelandair logo]()
$522
This oojo deal was found by Cheapflights users on 6/4. 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 oojo is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Mon 10/57:00 pm
SEA
- BRU
1 stop32h 55m
Icelandair
Sun 10/181:50 pm
BRU
- SEA
1 stop15h 50m
Icelandair
Deal found 6/4![Icelandair logo]()
$523
This oojo deal was found by Cheapflights users on 6/1. 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 oojo is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Tue 9/13:40 pm
SEA
- BRU
1 stop12h 15m
Icelandair
Wed 9/91:50 pm
BRU
- SEA
1 stop13h 05m
Icelandair
Deal found 6/1![Icelandair logo]()
$534
This oojo deal was found by Cheapflights users on 6/1. 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 oojo is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Wed 9/211:25 pm
SEA
- BRU
1 stop28h 30m
Icelandair
Wed 9/91:50 pm
BRU
- SEA
1 stop13h 05m
Icelandair
Deal found 6/1![Icelandair logo]()
$536
This Kiwi.com deal was found by Cheapflights users on 6/5. 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.
Wed 9/233:40 pm
SEA
- BRU
1 stop12h 15m
Icelandair
Mon 10/51:50 pm
BRU
- SEA
1 stop13h 05m
Icelandair
Deal found 6/5![Icelandair logo]()
$555
This Kiwi.com deal was found by Cheapflights users on 6/5. 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.
Thu 9/247:00 pm
SEA
- BRU
1 stop32h 55m
Icelandair
Thu 10/11:50 pm
BRU
- SEA
1 stop13h 05m
Icelandair
Deal found 6/5![Icelandair logo]()
$556
This Icelandair deal was found by Cheapflights users on 6/5. 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 Icelandair is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Sat 9/263:40 pm
SEA
- BRU
1 stop12h 15m
Icelandair
Wed 10/71:50 pm
BRU
- SEA
1 stop13h 05m
Icelandair
Deal found 6/5![Icelandair logo]()
$557
This Kiwi.com deal was found by Cheapflights users on 6/1. 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 Kiwi.com is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Sun 9/137:00 pm
SEA
- BRU
1 stop32h 55m
Icelandair
Thu 10/11:50 pm
BRU
- SEA
1 stop13h 05m
Icelandair
Deal found 6/1![Icelandair logo]()
$558
This Mytrip deal was found by Cheapflights users on 6/1. 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.
Tue 8/183:40 pm
SEA
- CRL
2 stops20h 35m
Multiple Airlines
Sun 8/309:05 am
CRL
- SEA
2 stops35h 40m
Multiple Airlines
Deal found 6/1![Multiple Airlines logo]()
$859
This Kiwi.com deal was found by Cheapflights users on 6/2. 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 Kiwi.com is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Sun 10/47:10 pm
SEA
- CRL
1 stop17h 15m
Multiple Airlines
Mon 10/1910:00 pm
CRL
- SEA
2 stops29h 45m
Multiple Airlines
Deal found 6/2![Multiple Airlines logo]()
$911
This Kiwi.com deal was found by Cheapflights users on 6/2. 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 Kiwi.com is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Sun 7/57:10 pm
SEA
- CRL
1 stop17h 05m
Multiple Airlines
Wed 7/159:20 am
CRL
- SEA
2 stops43h 05m
Multiple Airlines
Deal found 6/2![Multiple Airlines logo]()
$931
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 June 6, 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 June 6, 2026.
This United Airlines deal was found by Cheapflights users on 6/2. 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 11/37:00 am
SEA
- BRU
1 stop16h 55m
United Airlines
Tue 11/1010:00 am
BRU
- SEA
2 stops43h 10m
United Airlines
Deal found 6/2![United Airlines logo]()
$708
This Delta deal was found by Cheapflights users on 6/1. 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 Delta is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Mon 11/97:20 am
SEA
- BRU
2 stops17h 50m
Delta
Fri 11/278:05 am
BRU
- SEA
1 stop12h 42m
Delta
Deal found 6/1![Delta logo]()
$735
This British Airways deal was found by Cheapflights users on 6/1. 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 British Airways is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Fri 11/136:50 pm
SEA
- BRU
1 stop13h 30m
British Airways
Mon 11/233:00 pm
BRU
- SEA
1 stop29h 30m
British Airways
Deal found 6/1![British Airways logo]()
$736
This United deal was found by Cheapflights users on 6/5. 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 United is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Thu 7/307:00 am
SEA
- BRU
1 stop17h 00m
Multiple Airlines
Wed 8/129:30 am
BRU
- SEA
2 stops22h 12m
Multiple Airlines
Deal found 6/5![Multiple Airlines logo]()
$859
This Scandinavian Airlines deal was found by Cheapflights users on 6/5. 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 Scandinavian Airlines is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Mon 10/197:20 am
SEA
- BRU
2 stops17h 20m
Scandinavian Airlines
Fri 10/2310:20 am
BRU
- SEA
2 stops19h 28m
Scandinavian Airlines
Deal found 6/5![Scandinavian Airlines logo]()
$873
This United Airlines deal was found by Cheapflights users on 6/1. 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 United Airlines is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Wed 11/1111:00 am
SEA
- BRU
1 stop12h 55m
United Airlines
Sat 11/2110:10 am
BRU
- SEA
1 stop17h 49m
United Airlines
Deal found 6/1![United Airlines logo]()
$734
This Delta deal was found by Cheapflights users on 6/5. 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 Delta is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Sat 8/86:00 am
SEA
- BRU
1 stop16h 40m
Delta
Thu 9/248:05 am
BRU
- SEA
2 stops17h 45m
Delta
Deal found 6/5![Delta logo]()
$856
This Mytrip deal was found by Cheapflights users on 6/1. 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.
Tue 8/183:40 pm
SEA
- CRL
2 stops20h 35m
Multiple Airlines
Sun 8/309:05 am
CRL
- SEA
2 stops35h 40m
Multiple Airlines
Deal found 6/1![Multiple Airlines logo]()
$859
This United Airlines deal was found by Cheapflights users on 6/5. 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 United Airlines is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Sun 9/278:40 am
SEA
- BRU
2 stops19h 35m
United Airlines
Wed 10/76:20 am
BRU
- SEA
1 stop15h 00m
United Airlines
Deal found 6/5![United Airlines logo]()
$782
This United Airlines deal was found by Cheapflights users on 6/1. 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 United Airlines is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Tue 9/158:40 am
SEA
- BRU
3 stops19h 35m
United Airlines
Thu 10/16:45 am
BRU
- SEA
1 stop19h 14m
United Airlines
Deal found 6/1![United Airlines logo]()
$783
This Kiwi.com deal was found by Cheapflights users on 6/2. 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 Kiwi.com is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Sun 10/47:10 pm
SEA
- CRL
1 stop17h 15m
Multiple Airlines
Mon 10/1910:00 pm
CRL
- SEA
2 stops29h 45m
Multiple Airlines
Deal found 6/2![Multiple Airlines logo]()
$911
This United Airlines deal was found by Cheapflights users on 6/5. 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 United Airlines is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Tue 7/213:00 pm
SEA
- BRU
2 stops20h 00m
United Airlines
Mon 8/1710:30 am
BRU
- SEA
2 stops36h 52m
United Airlines
Deal found 6/5![United Airlines logo]()
$905
This Mytrip deal was found by Cheapflights users on 6/3. 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.
Sun 7/193:40 pm
SEA
- CRL
2 stops16h 30m
Multiple Airlines
Sun 8/99:40 am
CRL
- SEA
2 stops34h 00m
Multiple Airlines
Deal found 6/3![Multiple Airlines logo]()
$1,053
This United Airlines deal was found by Cheapflights users on 6/3. 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.
Thu 7/910:45 am
SEA
- BRU
2 stops41h 30m
United Airlines
Thu 7/169:55 am
BRU
- SEA
1 stop20h 12m
United Airlines
Deal found 6/3![United Airlines logo]()
$943
This Kiwi.com deal was found by Cheapflights users on 6/5. 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.
Wed 7/225:30 pm
SEA
- CRL
1 stop15h 15m
Multiple Airlines
Mon 8/179:40 pm
CRL
- SEA
2 stops30h 45m
Multiple Airlines
Deal found 6/5![Multiple Airlines logo]()
$1,057
This United Airlines deal was found by Cheapflights users on 6/5. 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 United Airlines is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Mon 10/1912:43 pm
SEA
- BRU
2 stops15h 32m
United Airlines
Fri 10/236:20 am
BRU
- SEA
1 stop15h 00m
United Airlines
Deal found 6/5![United Airlines logo]()
$958
This Mytrip deal was found by Cheapflights users on 6/2. 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.
Wed 10/146:50 pm
SEA
- CRL
2 stops16h 10m
Multiple Airlines
Wed 10/219:00 pm
CRL
- SEA
3 stops33h 04m
Multiple Airlines
Deal found 6/2![Multiple Airlines logo]()
$1,089
This Kiwi.com deal was found by Cheapflights users on 6/5. 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.
Wed 7/227:10 pm
SEA
- CRL
1 stop28h 30m
Multiple Airlines
Wed 7/298:00 am
CRL
- SEA
2 stops18h 10m
Multiple Airlines
Deal found 6/5![Multiple Airlines logo]()
$1,123
This Kiwi.com deal was found by Cheapflights users on 6/5. 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.
Mon 7/205:30 pm
SEA
- CRL
1 stop15h 20m
Multiple Airlines
Sun 8/239:15 am
CRL
- SEA
2 stops16h 55m
Multiple Airlines
Deal found 6/5![Multiple Airlines logo]()
$1,150
This Kiwi.com deal was found by Cheapflights users on 6/5. 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.
Wed 7/225:30 pm
SEA
- CRL
1 stop15h 15m
Multiple Airlines
Sun 8/239:15 am
CRL
- SEA
2 stops16h 55m
Multiple Airlines
Deal found 6/5![Multiple Airlines logo]()
$1,152
This Mytrip deal was found by Cheapflights users on 6/5. 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.
Wed 9/166:50 pm
SEA
- CRL
2 stops18h 25m
Multiple Airlines
Sat 9/268:10 am
CRL
- SEA
2 stops18h 00m
Multiple Airlines
Deal found 6/5![Multiple Airlines logo]()
$1,161
This Kiwi.com deal was found by Cheapflights users on 6/5. 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 8/97:10 pm
SEA
- CRL
1 stop17h 05m
Multiple Airlines
Thu 9/246:35 am
CRL
- SEA
2 stops19h 35m
Multiple Airlines
Deal found 6/5![Multiple Airlines logo]()
$1,161
This Kiwi.com deal was found by Cheapflights users on 6/1. 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 Kiwi.com is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Wed 7/15:30 pm
SEA
- CRL
1 stop15h 15m
Multiple Airlines
Tue 7/74:50 pm
CRL
- SEA
2 stops35h 35m
Multiple Airlines
Deal found 6/1![Multiple Airlines logo]()
$1,177
This Mytrip deal was found by Cheapflights users on 6/2. 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.
Fri 7/102:10 pm
SEA
- CRL
2 stops20h 30m
Multiple Airlines
Fri 7/179:50 am
CRL
- SEA
3 stops32h 50m
Multiple Airlines
Deal found 6/2![Multiple Airlines logo]()
$1,184
Last-minute flights from Seattle to BelgiumDiscover last-minute flight deals from Seattle to Belgium. Data last updated June 6, 2026 and is based on user searches.
Discover last-minute flight deals from Seattle to Belgium. Data last updated June 6, 2026 and is based on user searches.
This Gotogate deal was found by Cheapflights users on 6/3. 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.
Mon 6/1511:25 pm
SEA
- BRU
1 stop28h 30m
Icelandair
Sun 6/281:50 pm
BRU
- SEA
1 stop30h 55m
Icelandair
Deal found 6/3![Icelandair logo]()
$693
This Gotogate deal was found by Cheapflights users on 6/2. 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 Gotogate is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Mon 6/1511:25 pm
SEA
- BRU
1 stop28h 30m
Icelandair
Thu 9/31:50 pm
BRU
- SEA
1 stop13h 05m
Icelandair
Deal found 6/2![Icelandair logo]()
$697
This Gotogate deal was found by Cheapflights users on 6/2. 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 Gotogate is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Mon 6/1511:25 pm
SEA
- BRU
1 stop28h 30m
Icelandair
Tue 6/301:50 pm
BRU
- SEA
1 stop15h 50m
Icelandair
Deal found 6/2![Icelandair logo]()
$701
This oojo deal was found by Cheapflights users on 6/4. 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 oojo is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Thu 6/1811:25 pm
SEA
- BRU
1 stop28h 30m
Icelandair
Fri 6/261:50 pm
BRU
- SEA
1 stop15h 50m
Icelandair
Deal found 6/4![Icelandair logo]()
$699
This FlightHub deal was found by Cheapflights users on 6/5. 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 FlightHub is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Mon 7/203:40 pm
SEA
- BRU
1 stop12h 15m
Icelandair
Sat 8/221:50 pm
BRU
- SEA
1 stop15h 50m
Icelandair
Deal found 6/5![Icelandair logo]()
$696
This Icelandair deal was found by Cheapflights users on 6/5. 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 Icelandair is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Mon 7/203:40 pm
SEA
- BRU
1 stop12h 15m
Icelandair
Tue 8/181:50 pm
BRU
- SEA
1 stop30h 55m
Icelandair
Deal found 6/5![Icelandair logo]()
$721
This oojo deal was found by Cheapflights users on 6/5. 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 7/217:00 pm
SEA
- BRU
1 stop32h 55m
Icelandair
Sun 8/231:50 pm
BRU
- SEA
1 stop30h 55m
Icelandair
Deal found 6/5![Icelandair logo]()
$691
This FlightHub deal was found by Cheapflights users on 6/5. 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 FlightHub is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Tue 7/2111:25 pm
SEA
- BRU
1 stop28h 30m
Icelandair
Sat 8/221:50 pm
BRU
- SEA
1 stop15h 50m
Icelandair
Deal found 6/5![Icelandair logo]()
$698
This Icelandair deal was found by Cheapflights users on 6/5. 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 Icelandair is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Tue 7/2111:25 pm
SEA
- BRU
1 stop28h 30m
Icelandair
Tue 8/181:50 pm
BRU
- SEA
1 stop30h 55m
Icelandair
Deal found 6/5![Icelandair logo]()
$722
This FlightHub deal was found by Cheapflights users on 6/5. 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 FlightHub is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Wed 7/2211:25 pm
SEA
- BRU
1 stop28h 30m
Icelandair
Sun 8/231:50 pm
BRU
- SEA
1 stop30h 55m
Icelandair
Deal found 6/5![Icelandair logo]()
$700
This Gotogate deal was found by Cheapflights users on 6/4. 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 Gotogate is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Mon 7/273:40 pm
SEA
- BRU
1 stop12h 15m
Icelandair
Wed 8/121:50 pm
BRU
- SEA
1 stop15h 50m
Icelandair
Deal found 6/4![Icelandair logo]()
$672
This Gotogate deal was found by Cheapflights users on 6/5. 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 Gotogate is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Thu 7/303:40 pm
SEA
- BRU
1 stop12h 15m
Icelandair
Wed 8/121:50 pm
BRU
- SEA
1 stop13h 05m
Icelandair
Deal found 6/5![Icelandair logo]()
$627
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 June 6, 2026.
Search for one-way flight options from Seattle to Belgium. Find affordable one-way fares based on user searches. Data last updated June 6, 2026.
This oojo deal was found by Cheapflights users on 6/1. 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 oojo is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Tue 10/137:00 pm
SEA
- BRU
1 stop32h 55m
Icelandair
Deal found 6/1![Icelandair logo]()
$230
This oojo deal was found by Cheapflights users on 6/5. 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 8/411:25 pm
SEA
- BRU
1 stop28h 30m
Icelandair
Deal found 6/5![Icelandair logo]()
$237
This Icelandair deal was found by Cheapflights users on 6/3. 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.
Sat 7/43:40 pm
SEA
- BRU
1 stop12h 15m
Icelandair
Deal found 6/3![Icelandair logo]()
$241
This FlightHub deal was found by Cheapflights users on 6/5. 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 FlightHub is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Mon 9/73:40 pm
SEA
- BRU
1 stop12h 15m
Icelandair
Deal found 6/5![Icelandair logo]()
$244
This FlightHub deal was found by Cheapflights users on 6/5. 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 FlightHub is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Tue 9/111:25 pm
SEA
- BRU
1 stop28h 30m
Icelandair
Deal found 6/5![Icelandair logo]()
$245
This Orbitz deal was found by Cheapflights users on 6/5. 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 Orbitz is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Sat 11/287:55 am
SEA
- BRU
2 stops22h 35m
Multiple Airlines
Deal found 6/5![Multiple Airlines logo]()
$250
This Kiwi.com deal was found by Cheapflights users on 6/5. 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.
Tue 8/253:40 pm
SEA
- BRU
1 stop12h 15m
Icelandair
Deal found 6/5![Icelandair logo]()
$253
This Kiwi.com deal was found by Cheapflights users on 6/5. 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.
Wed 8/267:00 pm
SEA
- BRU
1 stop32h 55m
Icelandair
Deal found 6/5![Icelandair logo]()
$255
This Kiwi.com deal was found by Cheapflights users on 6/5. 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.
Fri 11/277:55 am
SEA
- CRL
3 stops22h 45m
Multiple Airlines
Deal found 6/5![Multiple Airlines logo]()
$265
This Kiwi.com deal was found by Cheapflights users on 6/5. 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.
Sat 11/287:55 am
SEA
- CRL
3 stops18h 05m
Multiple Airlines
Deal found 6/5![Multiple Airlines logo]()
$268
This Kiwi.com deal was found by Cheapflights users on 6/5. 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 11/292:35 pm
SEA
- CRL
2 stops21h 30m
Multiple Airlines
Deal found 6/5![Multiple Airlines logo]()
$275
This Kiwi.com deal was found by Cheapflights users on 6/6. 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.
Wed 8/2611:25 pm
SEA
- CRL
2 stops37h 05m
Multiple Airlines
Deal found 6/6![Multiple Airlines logo]()
$298
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 June 6, 2026.
Round-trip from | $520 (oojo) |
|---|---|
One-way from | $230 (oojo) |
Popular in | June |
Cheapest in | January |
Average price | $948 |
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 June 6, 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
Tue 11/3
7:00 am-8:55 am
1 stop16h 55m
Brussels Bruxelles-National
Tue 11/10
10:00 am-8:10 pm
2 stops43h 10m
$708
SeattleBrussels
SEA - BRU
SEABRU
Seattle/Tacoma Intl
Wed 11/11
11:00 am-8:55 am
1 stop12h 55m
Brussels Bruxelles-National
Sat 11/21
10:10 am-6:59 pm
1 stop17h 49m
$734
Quickest round-trip
SeattleBrussels
SEA - BRU
SEABRU
Seattle/Tacoma Intl
Mon 11/9
7:20 am-10:10 am
2 stops17h 50m
Brussels Bruxelles-National
Fri 11/27
8:05 am-11:47 am
1 stop12h 42m
$735
SeattleBrussels
SEA - BRU
SEABRU
Seattle/Tacoma Intl
Fri 11/13
6:50 pm-5:20 pm
1 stop13h 30m
Brussels Bruxelles-National
Mon 11/23
3:00 pm-11:30 am
1 stop29h 30m
$736
SeattleBrussels
SEA - BRU
SEABRU
Seattle/Tacoma Intl
Sun 9/27
8:40 am-1:15 pm
2 stops19h 35m
Brussels Bruxelles-National
Wed 10/7
6:20 am-12:20 pm
1 stop15h 00m
$782
SeattleBrussels
SEA - BRU
SEABRU
Seattle/Tacoma Intl
Tue 9/15
8:40 am-1:15 pm
3 stops19h 35m
Brussels Bruxelles-National
Thu 10/1
6:45 am-4:59 pm
1 stop19h 14m
$783
SeattleBrussels
SEA - BRU
SEABRU
Seattle/Tacoma Intl
Sat 8/8
6:00 am-7:40 am
1 stop16h 40m
Brussels Bruxelles-National
Thu 9/24
8:05 am-4:50 pm
2 stops17h 45m
$856
SeattleBrussels
SEA - BRU
SEABRU
Seattle/Tacoma Intl
Thu 7/30
7:00 am-9:00 am
1 stop17h 00m
Brussels Bruxelles-National
Wed 8/12
9:30 am-10:42 pm
2 stops22h 12m
$859
SeattleBrussels
SEA - CRL
SEACRL
Seattle/Tacoma Intl
Tue 8/18
3:40 pm-9:15 pm
2 stops20h 35m
Charleroi Brussels
Sun 8/30
9:05 am-11:45 am
2 stops35h 40m
$859
SeattleBrussels
SEA - BRU
SEABRU
Seattle/Tacoma Intl
Mon 10/19
7:20 am-9:40 am
2 stops17h 20m
Brussels Bruxelles-National
Fri 10/23
10:20 am-8:48 pm
2 stops19h 28m
$873
Showing 1-10 of 41 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, August is the cheapest month in which you can book a flight from Seattle to Belgium (average of $362). Flying from Seattle to Belgium in June is currently the most expensive (average of $693). 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 79 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 June 6, 2026.
Peruse reviews from past customers who have flown with Delta,KLM, andUnited Airlines from Seattle to Belgium to help guide your decision. You can also see how each airline stacks up in terms of entertainment options, comfort, food, crew/service, and boarding process.
Boarding
8.1
Overall
7.9
Crew
8.5
Comfort
7.8
Food
7.2
Entertainment
7.8
Reviews
1 / 20
10.0
ExcellentAnonymous,May 2026
SEA - KOA
Boarding
8.1
Overall
7.9
Crew
8.5
Comfort
7.8
Food
7.2
Entertainment
7.8
Reviews
1 / 20
10.0
ExcellentAnonymous,May 2026
SEA - KOA
Boarding
8.1
Overall
7.9
Crew
8.5
Comfort
7.8
Food
7.2
Entertainment
7.8
Reviews
1 / 20
10.0
ExcellentAnonymous,May 2026
SEA - KOA
Boarding
8.1
Overall
7.9
Crew
8.5
Comfort
7.8
Food
7.2
Entertainment
7.8
Reviews
1 / 20
10.0
ExcellentAnonymous,May 2026
SEA - KOA
Boarding
8.1
Overall
7.9
Crew
8.5
Comfort
7.8
Food
7.2
Entertainment
7.8
Reviews
1 / 20
10.0
ExcellentAnonymous,May 2026
SEA - KOA
Boarding
8.1
Overall
7.9
Crew
8.5
Comfort
7.8
Food
7.2
Entertainment
7.8
Reviews
1 / 20
10.0
ExcellentAnonymous,May 2026
SEA - KOA
Related info for your journey
Find useful and relevant information for your journey from Seattle to Belgium. Access travel guides, tips, and recommendations to enhance your travel experience. Get information about local attractions, weather, transportation options, and more.
Browse thousands of different options on Cheapflights for your next trip
Toggle through the tabs below to find thousands of options on Cheapflights for your next trip.
Alternative routes
Complete your trip
Flights by cabin class
Other flight options
Popular flights
Top destinations
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 June 6, 2026.
Popular flight searches
Check out other popular destinations found by fellow travelers in 2026
Seattle to Belgium flights
Consider these flights traveling from Seattle to Belgium.
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 June 6, 2026.
| Airline | Cheapest | Average | Flexibility | On-time |
|---|---|---|---|---|
| Cheapest$383 | Average$494 | FlexibilityNo cancel fee | On-time76% | |
| Cheapest$421 | Average$621 | FlexibilityNo cancel fee | On-time70% | |
| Cheapest$470 | Average$741 | FlexibilityNo cancel fee | On-time69% | |
| Cheapest$481 | Average$719 | FlexibilityNo cancel fee | On-time75% | |
| Cheapest$482 | Average$642 | FlexibilityNo cancel fee | On-timeN/A | |
| Cheapest$494 | Average$663 | FlexibilityNo cancel fee | On-time76% |