In terms of precipitation, rainfall in Southeast Europe ranges from 0.2 - 2.5 inches per month. December is typically the wettest month, when rainfall can reach 2.5 in. June is typically the driest time to visit Southeast Europe when rainfall is around 0.2 in.

If weather is an important factor for your trip to Southeast Europe, 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 82.4 F. Travelers looking to avoid the cold should look outside of January, when temperatures are typically at their lowest (around 50.0 F).

What are the most popular routes from Islip, New York to Southeast Europe?

Most travelers choose Islip Long Island - Dubrovnik, Islip Long Island - Zagreb Franjo Tuđman or Islip Long Island - Athens Eleftherios V. when deciding on the best route from Islip, New York to Southeast Europe.

How far in advance should I book a flight from Islip, New York to Southeast Europe?

Travelers have found it’s best to book a flight 46 days in advance to save up to 9% compared to booking the same week of travel. As your travel date approaches, the cost of this flight route may potentially increase. While opting to book 46 days out may not be an option for all, there are still additional ways to secure a deal in the near future. You might find a flight from Islip, New York to Southeast Europe 1-2 weeks in advance for as low as $701, or $820 for flights within the next 24 hours.

What is the cheapest month to fly from Islip, New York to Southeast Europe?

Due to multiple factors, expect to potentially pay more when booking in December. For low rates, April can be a great choice for travel to Southeast Europe. Flights to Southeast Europe from Islip, New York in April are about $778 on average during April, but can be found for as low as $317.

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

When flying from Islip, New York to Southeast Europe, the time of day you decide to fly out makes little to no difference towards the overall price you’ll pay on tickets.

What airport do you fly from for flights from Islip to Southeast Europe?

If you book a flight to Southeast Europe from Islip, you will be flying from Long Island, which is the city’s only airport. Islip Long Island (ISP) is located 7.2 mi from the center of Islip.

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

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

How can I find direct flights from Islip to Southeast Europe?

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

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

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

$607+ Flights from Islip, NY to Southeast Europe

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Cheap flight deals from Islip to Southeast Europe

Popular in	December
Cheapest in	April
Average price	$809

Highest demand for flights based on searches. 5% potential increase in price ($45 potential increase over avg. RT price).

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Cheapest flight prices on average. 3% potential price decrease ($25 potential savings vs. average RT price).

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Average for round-trip flights in August 2025

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Find flight deals from Islip to Southeast Europe

One-way flights from Islip to Southeast Europe
Search for one-way flight options from Islip to Southeast Europe. Find affordable one-way fares based on user searches. Data last updated August 18, 2025.

Sat 8/237:33 pmISP - ATH

2 stops58h 27mMultiple Airlines

Deal found 8/18

$607

Sat 11/152:19 pmISP - ATH