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$795+ Cheap flights from Flint, MI to Islip (FNT - 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 12/22. Fares are subject to change and may not be available on all flights or dates of travel.
FNT — ISP
Oct 11 — Oct 181
Sat 10/11
Sat 10/18
1 adult, Economy
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Cheap flight deals from Flint to Islip

Discover tips and strategies to find the most affordable flight options for your journey from Flint (FNT) to Islip (ISP). 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 September 11, 2025.

Round-trip from

$795
(United)

Popular in

April

Cheapest in

July

Average price

$287
From Flint Bishop to Islip Long Island
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Highest demand for flights based on searches. 16% potential increase in price ($58 potential increase over avg. RT price).
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Cheapest flight prices on average. 4% potential price decrease ($13 potential savings vs. average RT price).
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Average for round-trip flights in September 2025
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Find flight deals from Flint to Islip

Cheapest flights from Flint to Islip
Explore the most affordable flight options available from Flint to Islip. Find the lowest fares from popular airlines and budget airlines, with prices last updated on September 11, 2025.

This United deal was found by Cheapflights users on 9/10. 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 United is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Mon 12/224:26 pmFNT - ISP
2 stops22h 55mMultiple Airlines
Sat 12/274:33 pmISP - FNT
2 stops29h 57mMultiple Airlines
Deal found 9/10$795

Cheapflights Fare Finder

 
Customize your flight search to find flights from Flint to Islip 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 11, 2025.
Use the filters below to find and compare flights from Flint to Islip that are best for you.

Fly from

Flint

Fly to

Islip

Route

Depart

Return

Price

FlintIslip

FNT - ISP

FNTISP

Flint Bishop

Mon 12/22

4:26 pm-3:21 pm

2 stops22h 55m

Islip Long Island

Sat 12/27

4:33 pm-10:30 pm

2 stops29h 57m

$795

Flights are sorted by cheapest round-trip flights first.

Deals found on 9/10

Best time to book a flight from Flint to Islip

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

What is the cheapest month to book a flight from Flint, Michigan to Islip?

Currently, January is the cheapest month in which you can book a flight from Flint, Michigan to Islip (average of $108). Flying from Flint, Michigan to Islip in November is currently the most expensive (average of $213). 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 Flint to Islip. Access travel guides, tips, and recommendations to enhance your travel experience. Get information about local attractions, weather, transportation options, and more.

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

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

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

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

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

    Yes. Cheapflights offers flight deals from Flint 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 Flint, Michigan to Islip?

    Currently, January is the cheapest month in which you can book a flight from Flint, Michigan to Islip (average of $108). Flying from Flint, Michigan to Islip in November is currently the most expensive (average of $213). 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 Islip?

Book flights to Islip if you plan to visit one of these locations
Riverhead
Southampton

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