Belgium

$345+ Cheap flights from Islip (ISP) 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 11/15. Fares are subject to change and may not be available on all flights or dates of travel.
ISP — BRU
Oct 13 — Oct 201
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Cheap flight deals from Islip to Belgium

Keep the following information in mind while searching for Islip to Belgium flight deals. Data was last updated September 13, 2025.

Round-trip from

$1,368
(Ovago)

One-way from

$345
(Kiwi.com)

Popular in

June

Cheapest in

January

Average price

$688
From Islip Long Island to Belgium
One-way flight from Islip Long Island to Belgium
Highest demand for flights based on searches. 13% potential increase in price ($107 potential increase over avg. RT price).
Cheapest flight prices on average. 2% potential price decrease ($20 potential savings vs. average RT price).
Average for round-trip flights in September 2025

Find flight deals from Islip to Belgium

Cheapest flights from Islip to Belgium
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 September 13, 2025.

This Ovago deal was found by Cheapflights users on 9/11. 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 Ovago is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Wed 10/82:19 pmISP - BRU
2 stops13h 21mMultiple Airlines
Sun 10/128:35 pmBRU - ISP
2 stops24h 46mMultiple Airlines
Deal found 9/11$1,368

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 September 13, 2025.
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

Wed 10/8

2:19 pm-9:40 am

2 stops13h 21m

Brussels Bruxelles-National

Sun 10/12

8:35 pm-3:21 pm

2 stops24h 46m

$1,368

IslipBrussels

ISP - BRU

ISPBRU

Islip Long Island

Sat 11/15

11:40 am-8:20 pm

3 stops50h 40m

$345

Flights are sorted by cheapest round-trip flights first.

Deals found on 9/10

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.
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

What is the cheapest month to book a flight from Islip to Belgium?

Currently, November is the cheapest month in which you can book a flight from Islip to Belgium (average of $614). Flying from Islip to Belgium in June is currently the most expensive (average of $1,077). 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.

Related info for your journey

Find useful and relevant information for your journey from Islip to Belgium. Access travel guides, tips, and recommendations to enhance your travel experience. Get information about local attractions, weather, transportation options, and more.
  • What airport do you fly from for flights from Islip to Belgium?

    Located just 7.2 mi from the city center, Islip Long Island (ISP) is the airport most travelers will use when flying to Belgium from Islip.

  • Can I find deals for flights from Islip to Belgium that include hotel bookings?

    Yes. In addition to deals on Islip to Belgium flights, Cheapflights offers vacation packages that include both flights and hotel.

  • How can I find direct flights from Islip to Belgium?

    After entering your origin and destination, apply the non-stop filter on the search result page to find direct flights from Islip to Belgium.

  • Can I find deals for business class flights from Islip to Belgium?

    Yes. Cheapflights offers flight deals from Islip to Belgium by cabin class. In addition to browsing deals, you can also filter by cabin class on the search results page after making a search.

  • What is the cheapest month to book a flight from Islip to Belgium?

    Currently, November is the cheapest month in which you can book a flight from Islip to Belgium (average of $614). Flying from Islip to Belgium in June is currently the most expensive (average of $1,077). 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.

See more FAQs

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