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Islip

$93+ Cheap flights from Detroit to Islip, NY (DTT - ISP)

This is the cheapest one-way flight price found by a Cheapflights user in the last 72 hours by searching for a flight departing on 8/13. Fares are subject to change and may not be available on all flights or dates of travel.
DTT — ISP
août 4 — août 111
lun. 8/4
lun. 8/11
1 adult, Economy
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Cheap flight deals from Detroit to Islip

Discover tips and strategies to find the most affordable flight options for your journey from Detroit (DTT) 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 juillet 30, 2025.

Round-trip from

$218
(Frontier)

One-way from

$93
(Cheapflightsfares)

Popular in

December

Cheapest in

February

Average price

$173
From Detroit (DTT) to Islip Long Island
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One-way flight from Detroit (DTT) to Islip Long Island
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Highest demand for flights based on searches. 13% potential increase in price ($26 potential increase over avg. RT price).
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Cheapest flight prices on average. 1% potential price decrease ($4 potential savings vs. average RT price).
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Average for round-trip flights in July 2025
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Find flight deals from Detroit to Islip

Cheapest flights from Detroit to Islip
Explore the most affordable flight options available from Detroit to Islip. Find the lowest fares from popular airlines and budget airlines, with prices last updated on juillet 30, 2025.

This Frontier deal was found by Cheapflights users on 7/29. 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 Frontier is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
mer. 8/61:17 pmDTW - ISP
1 stop6h 35mFrontier
sam. 8/98:37 pmISP - DTW
1 stop12h 35mFrontier
Deal found 7/29$198

Cheapflights Fare Finder

 
Customize your flight search to find flights from Detroit 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 juillet 30, 2025.
Use the filters below to find and compare flights from Detroit to Islip that are best for you.

Fly from

Detroit

Fly to

Islip

Route

Depart

Return

Price

DetroitIslip

DTW - ISP

DTWISP

Detroit Metropolitan Wayne County

sam. 8/9

1:06 pm-7:42 pm

1 stop6h 36m

Islip Long Island

ven. 8/15

8:37 pm-8:47 am

1 stop12h 10m

$218

DetroitIslip

DTW - ISP

DTWISP

Detroit Metropolitan Wayne County

mer. 8/13

1:17 pm-7:52 pm

1 stop6h 35m

$93

DetroitIslip

DTW - ISP

DTWISP

Detroit Metropolitan Wayne County

dim. 8/31

2:15 pm-10:10 pm

2 stops7h 55m

$199

DetroitIslip

DTW - ISP

DTWISP

Detroit Metropolitan Wayne County

dim. 11/2

5:41 am-12:45 pm

3 stops31h 04m

$265

Flights are sorted by cheapest round-trip flights first.

Deals found on 7/28

Best time to book a flight from Detroit to Islip

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

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

Currently, January is the cheapest month in which you can book a flight from Detroit to Islip, New York (average of $108). Flying from Detroit to Islip, New York 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.

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

Find hourly flight availability from Detroit to Islip. Discover flight options and departure times throughout the day, allowing you to choose a departure time that suits your schedule. Data last updated juillet 30, 2025.

It’s typically best to fly out from Detroit to Islip, New York in the morning. Doing so could potentially save you 2% on the flight price compared to flying at noon, which is usually more expensive.

Reviews of airlines servicing Islip

Get insights into the airlines that provide service to Islip. Read reviews, discover amenities, and learn about the overall travel experience offered by airlines. Use this information to make informed decisions when choosing an airline for your flight to Islip. Reviews last updated juillet 30, 2025.
Read through reviews of airlines operating flights from Detroit to Islip, such as Southwest and Frontier. Reviews also offer insight into each airline's entertainment options, comfort, food, crew/service, and boarding process.
Southwest
8.0
Very good
4,241 reviews

Food

7.0

Boarding

8.1

Comfort

8.0

Crew

8.6

Overall

8.0

Entertainment

7.5

Reviews

1 / 20
8.0
Excellent

Gina,Jul 2025

LAS - DEN

We experienced bad weather, which turned our 1.5 hour flight from Las Vegas to Denver, into 3.5. The pilot and crew kept us updated and explained that we had to circle and or possibly redirect to another airport. After circling for sometime, we were able to land smoothly in Denver. Thank you to all the flight crew, tower control, and all who got us to our destination safely.
Southwest
8.0
Very good
4,241 reviews
Southwest
8.0
Very good
4,241 reviews

Food

7.0

Boarding

8.1

Comfort

8.0

Crew

8.6

Overall

8.0

Entertainment

7.5

Reviews

1 / 20
8.0
Excellent

Gina,Jul 2025

LAS - DEN

We experienced bad weather, which turned our 1.5 hour flight from Las Vegas to Denver, into 3.5. The pilot and crew kept us updated and explained that we had to circle and or possibly redirect to another airport. After circling for sometime, we were able to land smoothly in Denver. Thank you to all the flight crew, tower control, and all who got us to our destination safely.
Frontier
5.9
Fair
3,237 reviews
Southwest
8.0
Very good
4,241 reviews

Food

7.0

Boarding

8.1

Comfort

8.0

Crew

8.6

Overall

8.0

Entertainment

7.5

Reviews

1 / 20
8.0
Excellent

Gina,Jul 2025

LAS - DEN

We experienced bad weather, which turned our 1.5 hour flight from Las Vegas to Denver, into 3.5. The pilot and crew kept us updated and explained that we had to circle and or possibly redirect to another airport. After circling for sometime, we were able to land smoothly in Denver. Thank you to all the flight crew, tower control, and all who got us to our destination safely.

Related info for your journey

Find useful and relevant information for your journey from Detroit to Islip. Access travel guides, tips, and recommendations to enhance your travel experience. Get information about local attractions, weather, transportation options, and more.

  • What is the cheapest airline to fly from Detroit to Islip, New York round-trip?

    Our cheapest airline available from Detroit to Islip, New York is Frontier. Our recent data shows that you can find tickets from as low as $218 on this airline.

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

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

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

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

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

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

    Currently, January is the cheapest month in which you can book a flight from Detroit to Islip, New York (average of $108). Flying from Detroit to Islip, New York 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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Alternative routes for Detroit to Islip

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Top airline flying from Detroit to Islip

Discover the top airline that operate flights from Detroit to Islip. Compare their services, reliability, and customer satisfaction ratings to choose the airline that best suits your travel preferences and needs. Over the last 7 days, Cheapflights users made 2,558,603 searches. Data last updated juillet 30, 2025.
AirlineCheapestAverageFlexibilityOn-time
SouthwestCheapest$286Average$376FlexibilityNo cancel feeOn-time63%

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