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$1,209+ Cheap flights from Islip, NY (ISP) to Ireland

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 5/16. Fares are subject to change and may not be available on all flights or dates of travel.
ISP — DUB
Dec 19 — Dec 261
Fri 12/19
Fri 12/26
1 adult, Economy
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Find flight deals from Islip to Ireland

Cheapest flights from Islip to Ireland
Explore the most affordable flight options available from Islip to Ireland. Find the lowest fares from popular airlines and budget airlines, with prices last updated on November 19, 2025.

This Kiwi.com deal was found by Cheapflights users on 11/17. 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 12/159:59 amISP - SNN
1 stop15h 21mMultiple Airlines
Mon 12/222:45 pmSNN - ISP
1 stop10h 00mMultiple Airlines
Deal found 11/17$4,569

Cheap flight deals from Islip to Ireland

Keep the following information in mind while searching for Islip to Ireland flight deals. Data was last updated November 19, 2025.

Most accurate provider

Mytrip
3 stars

Most trusted provider

Mytrip
3 stars

Round-trip from

$1,175
(Ovago)

Popular in

December

Cheapest in

October

Average price

$488
Provider with most accurate pricing for New York (NYC)-Dublin flight deals.
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Provider most trusted by Cheapflights users for New York (NYC)-Dublin flights.
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From Islip Long Island to Ireland
Search Deals
Highest demand for flights based on searches. 3% potential increase in price ($20 potential increase over avg. RT price).
Search Deals
Cheapest flight prices on average. 3% potential price decrease ($18 potential savings vs. average RT price).
Search Deals
Average for round-trip flights in November 2025
Search Deals

Cheapflights Fare Finder

 
Customize your flight search to find flights from Islip to Ireland 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 November 19, 2025.
Use the filters below to find and compare flights from Islip to Ireland that are best for you.

Fly from

Islip

Fly to

Ireland

Route

Depart

Return

Price

IslipDublin

ISP - DUB

ISPDUB

Islip Long Island

Sat 5/16

7:25 am-4:30 am

1 stop16h 05m

Dublin

Sat 5/23

12:40 pm-7:45 pm

1 stop12h 05m

$1,209

IslipDublin

ISP - DUB

ISPDUB

Islip Long Island

Sat 1/3

12:30 pm-10:20 am

2 stops40h 50m

Dublin

Sat 1/10

1:45 pm-7:45 pm

1 stop35h 00m

$1,303

IslipShannon

ISP - SNN

ISPSNN

Islip Long Island

Mon 12/15

9:59 am-6:20 am

1 stop15h 21m

Shannon

Mon 12/22

2:45 pm-7:45 pm

1 stop10h 00m

$4,569

Flights are sorted by cheapest round-trip flights first.

Deals found on 11/18

Best time to book a flight from Islip to Ireland

Have a flexible travel schedule? Discover the best time to fly to Ireland 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 Ireland

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

Currently, February is the cheapest month in which you can book a flight from Islip, New York to Ireland (average of $242). Flying from Islip, New York to Ireland in June is currently the most expensive (average of $433). 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 Ireland. 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 Ireland?

    If you book a flight to Ireland 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 Ireland that include hotel bookings?

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

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

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

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

    Yes. Cheapflights offers flight deals from Islip to Ireland 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, New York to Ireland?

    Currently, February is the cheapest month in which you can book a flight from Islip, New York to Ireland (average of $242). Flying from Islip, New York to Ireland in June is currently the most expensive (average of $433). 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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