In terms of precipitation, rainfall in Islip, New York ranges from 3.3 - 4.4 inches per month. March is typically the wettest month, when rainfall can reach 4.4 in. February is typically the driest time to visit Islip, New York when rainfall is around 3.3 in.

If weather is an important factor for your trip to Islip, New York, use this chart to help with planning. For those seeking warmer temperatures, July is the ideal time of year to visit, when temperatures reach an average of 73.4 F. Travelers looking to avoid the cold should look outside of January, when temperatures are typically at their lowest (around 30.2 F).

What is the cheapest time of day to fly from BE to ISP?

Regardless of the time of day you decide to fly, the ticket price will remain around the same. Book flights from Belgium to Islip, New York as you normally would.

What airport do you fly into for flights to Islip from Belgium?

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

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

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

How can I find direct flights from Belgium to Islip?

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

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

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

$1,416+ Flights from Belgium to Islip, NY

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Cheap flight deals from Belgium to Islip

Cheapest flights from Belgium to Islip
Explore the most affordable flight options available from Belgium to Islip. Find the lowest fares from popular airlines and budget airlines, with prices last updated on janvier 29, 2026.

ven. 3/139:00 am

BRU

ISP

2 stops28h 55m

Multiple Airlines

ven. 3/209:45 am

ISP

BRU

2 stops17h 20m

Multiple Airlines

Deal found 1/27

$1,416

Best flights from Belgium to Islip
Discover carefully curated flight deals from Belgium to Islip that have cost, travel time, and layovers in mind to ensure you get the best travel experience. Data last updated janvier 29, 2026.

ven. 3/139:00 am

BRU

ISP

2 stops28h 55m

Multiple Airlines

ven. 3/209:45 am

ISP

BRU

2 stops17h 20m

Multiple Airlines

Deal found 1/27

$1,416

Find flight deals from Belgium to Islip

Round-trip from	$1,416 (Trip.com)
Popular in	December
Cheapest in	September
Average price	$564

From Belgium to Islip Long Island

Search Deals

Highest demand for flights based on searches. 3% potential increase in price ($22 potential increase over avg. RT price).

Search Deals

Cheapest flight prices on average. 1% potential price decrease ($9 potential savings vs. average RT price).

Search Deals

Average for round-trip flights in January 2026

Search Deals

Fly from

Fly to

Route

Depart

Return

Price

BrusselsIslip

BRU - ISP

BRUISP

Brussels Bruxelles-National

ven. 3/13

9:00 am-8:55 am

2 stops28h 55m

Islip Long Island

ven. 3/20

9:45 am-8:05 am

2 stops17h 20m

$1,416

Flights are sorted by cheapest round-trip flights first.

Deals found on 1/27

Best time to book a flight from Belgium to Islip

Have a flexible travel schedule? Discover the best time to fly to Islip from Belgium 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 Belgium to Islip

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

Currently, June is the cheapest month in which you can book a flight from Belgium to Islip, New York (average of $355). Flying from Belgium to Islip, New York in July is currently the most expensive (average of $470). 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

What airport do you fly into for flights to Islip from Belgium?
Located just 7.2 mi from the city center, Islip Long Island (ISP) is the airport most travelers will use when flying to Islip from Belgium.
Can I find deals for flights from Belgium to Islip that include hotel bookings?
Yes. In addition to deals on Belgium to Islip flights, Cheapflights offers vacation packages that include both flights and hotel.
How can I find direct flights from Belgium to Islip?
After entering your origin and destination, apply the non-stop filter on the search result page to find direct flights from Belgium to Islip.
Can I find deals for business class flights from Belgium to Islip?
Yes. Cheapflights offers flight deals from Belgium to Islip 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 Belgium to Islip, New York?
Currently, June is the cheapest month in which you can book a flight from Belgium to Islip, New York (average of $355). Flying from Belgium to Islip, New York in July is currently the most expensive (average of $470). 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.

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$1,416+ Cheap flights from Belgium to Islip, NY (ISP)

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 3/13. Fares are subject to change and may not be available on all flights or dates of travel.

Find cheap flights from Belgium to Islip with Cheapflights

1. Tell us where you want to go

2. Select your favorite providers

3. Compare prices and book

Cheap flight deals from Belgium to Islip

Cheapest flights from Belgium to IslipExplore the most affordable flight options available from Belgium to Islip. Find the lowest fares from popular airlines and budget airlines, with prices last updated on janvier 29, 2026.

Explore the most affordable flight options available from Belgium to Islip. Find the lowest fares from popular airlines and budget airlines, with prices last updated on janvier 29, 2026.

Find flight deals from Belgium to Islip

Keep the following information in mind while searching for Belgium to Islip flight deals. Data was last updated janvier 29, 2026.

Round-trip from

Popular in

Cheapest in

Average price

Cheapflights Fare Finder

Use the filters below to find and compare flights from Belgium to Islip that are best for you.

Best time to book a flight from Belgium to Islip

Have a flexible travel schedule? Discover the best time to fly to Islip from Belgium with our price prediction graph.

Cheapflights Insights

Everything you need to know about your flight from Belgium to Islip

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

Related info for your journey

Find useful and relevant information for your journey from Belgium to Islip. 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 into for flights to Islip from Belgium?

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

How can I find direct flights from Belgium to Islip?

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

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

Traveling to a place near Islip?

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Cheapest flights from Belgium to Islip
Explore the most affordable flight options available from Belgium to Islip. Find the lowest fares from popular airlines and budget airlines, with prices last updated on janvier 29, 2026.