$1,202+ Cheap flights from Islip, NY (ISP) to Belgium
This is the cheapest round-trip flight price found by a Cheapflights user in the last 72 hours by searching for a flight departing on 3/17. Fares are subject to change and may not be available on all flights or dates of travel.
ISP — BRU
Mar 3 — Mar 101
1 adult, Economy
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Cheapest flights from Islip to BelgiumExplore the most affordable flight options available from Islip to Belgium. Find the lowest fares from popular airlines and budget airlines, with prices last updated on February 1, 2026.
Explore the most affordable flight options available from Islip to Belgium. Find the lowest fares from popular airlines and budget airlines, with prices last updated on February 1, 2026.
This Expedia deal was found by Cheapflights users on 1/31. 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 Expedia is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Tue 3/179:45 am
ISP
- BRU
2 stops27h 30m
Multiple Airlines
Tue 3/2410:15 am
BRU
- ISP
2 stops27h 40m
Multiple Airlines
Deal found 1/31![Multiple Airlines logo]()
$1,202
Best flights from Islip to BelgiumDiscover carefully curated flight deals from Islip to Belgium that have cost, travel time, and layovers in mind to ensure you get the best travel experience. Data last updated February 1, 2026.
Discover carefully curated flight deals from Islip to Belgium that have cost, travel time, and layovers in mind to ensure you get the best travel experience. Data last updated February 1, 2026.
This Expedia deal was found by Cheapflights users on 1/31. 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 Expedia is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Tue 3/179:45 am
ISP
- BRU
2 stops27h 30m
Multiple Airlines
Tue 3/2410:15 am
BRU
- ISP
2 stops27h 40m
Multiple Airlines
Deal found 1/31![Multiple Airlines logo]()
$1,202
Find flight deals from Islip to Belgium
Keep the following information in mind while searching for Islip to Belgium flight deals. Data was last updated February 1, 2026.
Round-trip from | $1,202 (Expedia) |
|---|---|
Popular in | December |
Cheapest in | February |
Average price | $579 |
Cheapflights Fare Finder
Customize your flight search to find flights from Islip 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 February 1, 2026.
Use the filters below to find and compare flights from Islip to Belgium that are best for you.
Fly from
Islip
Fly to
Belgium
Route
Depart
Return
Price
IslipBrussels
ISP - BRU
ISPBRU
Islip Long Island
Tue 3/17
9:45 am-6:15 pm
2 stops27h 30m
Brussels Bruxelles-National
Tue 3/24
10:15 am-8:55 am
2 stops27h 40m
$1,202
Best time to book a flight from Islip to Belgium
Have a flexible travel schedule? Discover the best time to fly to Belgium from Islip with our price prediction graph.
ISP-BRU
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 Islip to Belgium
ISP-BE0
ISP-BRU
What is the cheapest month to book a flight from Islip, New York to Belgium?
Currently, February is the cheapest month in which you can book a flight from Islip, New York to Belgium (average of $316). Flying from Islip, New York to Belgium in June is currently the most expensive (average of $676). 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.