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$1,649+ Cheap flights from Islip, NY (ISP) to Frankfurt (FRA)

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 2/16. Fares are subject to change and may not be available on all flights or dates of travel.
ISP — FRA
Feb 2 — Feb 91
Mon 2/2
Mon 2/9
1 adult, Economy
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Cheap flight deals from Islip to Frankfurt

Cheapest flights from Islip to Frankfurt
Explore the most affordable flight options available from Islip to Frankfurt. Find the lowest fares from popular airlines and budget airlines, with prices last updated on January 3, 2026.

This Kiwi.com deal was found by Cheapflights users on 1/2. 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 2/169:59 amISP - FRA
2 stops20h 01mMultiple Airlines
Mon 2/2311:05 amFRA - ISP
1 stop14h 40mMultiple Airlines
Deal found 1/2$1,649

Find flight deals from Islip to Frankfurt

Discover tips and strategies to find the most affordable flight options for your journey from Islip (ISP) to Frankfurt (FRA). Learn about various techniques such as flexible date searches, comparing prices across and setting up price alerts. Use these methods to find the cheapest flights available for your travel needs. Data last updated January 3, 2026.

Most accurate provider

AranGrant
2 stars

Most trusted provider

AranGrant
3 stars

Round-trip from

$1,649
(Kiwi.com)

Popular in

December

Cheapest in

January

Average price

$594
Provider with most accurate pricing for Islip Long Island-Frankfurt am Main flight deals.
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Provider most trusted by Cheapflights users for Islip Long Island-Frankfurt am Main flights.
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From Islip Long Island to Frankfurt am Main
Search Deals
Highest demand for flights based on searches. 1% potential increase in price ($7 potential increase over avg. RT price).
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Cheapest flight prices on average. 3% potential price decrease ($23 potential savings vs. average RT price).
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Average for round-trip flights in January 2026
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Cheapflights Fare Finder

 
Customize your flight search to find flights from Islip to Frankfurt 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 January 3, 2026.
Use the filters below to find and compare flights from Islip to Frankfurt am Main Airport that are best for you.

Fly from

Islip

Fly to

Frankfurt

Route

Depart

Return

Price

IslipFrankfurt am Main

ISP - FRA

ISPFRA

Islip Long Island

Mon 2/16

9:59 am-12:00 pm

2 stops20h 01m

Frankfurt am Main

Mon 2/23

11:05 am-7:45 pm

1 stop14h 40m

$1,649

Flights are sorted by cheapest round-trip flights first.

Deals found on 1/2

  • Most accurate provider: When it comes to deals on Islip, New York-Frankfurt am Main Airport flights, users find the pricing of AranGrant to be most consistent on Cheapflights vs. AranGrant Users can find the same prices on Islip, New York-Frankfurt am Main Airport flight deals on Cheapflights vs. AranGrant 90-95% of the time. Price accuracy is based on data collected from Islip, New York-Frankfurt am Main Airport flight searches over the past month and is updated monthly.
  • Most trusted provider: When it comes to deals on Islip, New York-Frankfurt am Main Airport flights, Cheapflights users trust AranGrant the most. AranGrant has received a user feedback score of 3 out of 3 stars (3 being the best), meaning they have been trusted the most by Cheapflights users looking for Islip, New York-Frankfurt am Main Airport flight deals. Provider user feedback score is based on Cheapflights searches over the past month and is updated monthly.

Best time to book a flight from Islip to Frankfurt

Have a flexible travel schedule? Discover the best time to fly to Frankfurt 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 Frankfurt am Main Airport

What is the cheapest month to book a flight from Islip, New York to Frankfurt am Main Airport?

Currently, January is the cheapest month in which you can book a flight from Islip, New York to Frankfurt am Main Airport (average of $300). Flying from Islip, New York to Frankfurt am Main Airport in December is currently the most expensive (average of $591). 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 Frankfurt. 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 Frankfurt am Main?

    Most people fly from Islip Long Island (ISP) if they book a flight from Islip to Frankfurt am Main. On average, Long Island has 0 outbound flights to Frankfurt am Main per day from 0 airlines. Islip Long Island is conveniently located just 7.2 mi from Islip’s city center.

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

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

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

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

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

    Yes. Cheapflights offers flight deals from Islip to Frankfurt 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 Frankfurt am Main Airport?

    Currently, January is the cheapest month in which you can book a flight from Islip, New York to Frankfurt am Main Airport (average of $300). Flying from Islip, New York to Frankfurt am Main Airport in December is currently the most expensive (average of $591). 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

Traveling to a place near Frankfurt am Main Airport?

Book flights to Frankfurt am Main Airport if you plan to visit one of these locations
Koblenz
Wurzburg
Baden-Baden
Speyer
Wiesbaden
Trier
Boppard
Mainz

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