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$99+ 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 11/12. Fares are subject to change and may not be available on all flights or dates of travel.
DTT — ISP
Nov 28 — Dec 51
Fri 11/28
Fri 12/5
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 October 29, 2025.

Most accurate provider

eDreams
3 stars

Most trusted provider

eDreams
3 stars

Round-trip from

$149
(Kiwi.com)

One-way from

$99
(Kiwi.com)

Popular in

December

Cheapest in

September

Average price

$192
Provider with most accurate pricing for Detroit (DTT)-Islip Long Island flight deals.
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Provider most trusted by Cheapflights users for Detroit (DTT)-Islip Long Island flights.
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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 ($25 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 October 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 October 29, 2025.

This Kiwi.com deal was found by Cheapflights users on 10/26. 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.
Thu 12/47:42 pmDTW - ISP
1 stop23h 52mMultiple Airlines
Wed 12/106:00 amISP - DTW
1 stop7h 55mMultiple Airlines
Deal found 10/26$149
This Kiwi.com deal was found by Cheapflights users on 10/26. 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.
Wed 12/39:53 pmDTW - ISP
1 stop11h 20mMultiple Airlines
Tue 12/98:29 pmISP - DTW
1 stop25h 20mMultiple Airlines
Deal found 10/26$164
This Frontier deal was found by Cheapflights users on 10/27. 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.
Fri 12/59:18 amDTW - ISP
1 stop10h 16mFrontier
Mon 12/86:00 amISP - DTW
1 stop8h 08mFrontier
Deal found 10/27$169
This Flightnetwork deal was found by Cheapflights users on 10/27. 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 Flightnetwork is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Thu 12/46:12 pmDTW - ISP
1 stop25h 22mFrontier
Mon 12/86:00 amISP - DTW
1 stop8h 08mFrontier
Deal found 10/27$170
This Kiwi.com deal was found by Cheapflights users on 10/27. 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.
Thu 12/47:42 pmDTW - ISP
1 stop23h 52mMultiple Airlines
Mon 12/810:19 amISP - DTW
2 stops21h 48mMultiple Airlines
Deal found 10/27$210
This Kiwi.com deal was found by Cheapflights users on 10/27. 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.
Tue 11/1110:42 amDTW - ISP
2 stops23h 55mMultiple Airlines
Sat 11/154:58 pmISP - DTW
1 stop22h 44mMultiple Airlines
Deal found 10/27$234
This Trip.com deal was found by Cheapflights users on 10/27. 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 Trip.com is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Tue 12/167:42 pmDTW - ISP
1 stop28h 56mMultiple Airlines
Sun 12/218:35 pmISP - DTW
1 stop21h 05mMultiple Airlines
Deal found 10/27$263

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 October 29, 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

Thu 12/4

7:42 pm-7:34 pm

1 stop23h 52m

Islip Long Island

Wed 12/10

6:00 am-1:55 pm

1 stop7h 55m

$149

DetroitIslip

DTW - ISP

DTWISP

Detroit Metropolitan Wayne County

Wed 12/3

9:53 pm-9:13 am

1 stop11h 20m

Islip Long Island

Tue 12/9

8:29 pm-9:49 pm

1 stop25h 20m

$164

DetroitIslip

DTW - ISP

DTWISP

Detroit Metropolitan Wayne County

Fri 12/5

9:18 am-7:34 pm

1 stop10h 16m

Islip Long Island

Mon 12/8

6:00 am-2:08 pm

1 stop8h 08m

$169

DetroitIslip

DTW - ISP

DTWISP

Detroit Metropolitan Wayne County

Thu 12/4

6:12 pm-7:34 pm

1 stop25h 22m

Islip Long Island

Mon 12/8

6:00 am-2:08 pm

1 stop8h 08m

$170

DetroitIslip

DTW - ISP

DTWISP

Detroit Metropolitan Wayne County

Fri 12/5

7:42 pm-9:13 am

1 stop13h 31m

Islip Long Island

Mon 12/8

10:19 am-8:07 am

2 stops21h 48m

$210

DetroitIslip

DTW - ISP

DTWISP

Detroit Metropolitan Wayne County

Thu 12/4

7:42 pm-7:34 pm

1 stop23h 52m

Islip Long Island

Mon 12/8

10:19 am-8:07 am

2 stops21h 48m

$210

DetroitIslip

DTW - ISP

DTWISP

Detroit Metropolitan Wayne County

Tue 11/11

10:42 am-10:37 am

2 stops23h 55m

Islip Long Island

Sat 11/15

4:58 pm-3:42 pm

1 stop22h 44m

$234

DetroitIslip

DTW - ISP

DTWISP

Detroit Metropolitan Wayne County

Tue 12/16

7:42 pm-12:38 am

1 stop28h 56m

Islip Long Island

Sun 12/21

8:35 pm-5:40 pm

1 stop21h 05m

$263

DetroitIslip

DTW - ISP

DTWISP

Detroit Metropolitan Wayne County

Thu 2/26

12:29 pm-6:46 pm

1 stop6h 17m

Islip Long Island

Sun 3/1

7:26 pm-5:02 pm

1 stop21h 36m

$277

DetroitIslip

DTW - ISP

DTWISP

Detroit Metropolitan Wayne County

Wed 11/12

10:42 am-5:42 pm

2 stops31h 00m

$99

Flights are sorted by cheapest round-trip flights first.

Deals found on 10/28

Showing 1-10 of 16 results
1
2

Compare providers for flights from Detroit to Islip

Provider information is updated monthly. Please note that these providers often have deals for this flight, but the availability may vary on a day-by-day basis on Cheapflights.
Use the table below to compare price accuracy, trust ratings, and cancellation policies for each provider offering flight deals from Detroit to Islip in October.
ProviderPrice AccuracyTrust Score*
ExpediaPrice Accuracy2 starsTrust Score*3 stars
FlightHubPrice Accuracy3 starsTrust Score*1 star
eDreamsPrice Accuracy3 starsTrust Score*3 stars

*The Trust Score is based on feedback from users after their booking experience. It measures overall satisfaction, helping us identify issues like hidden fees, problems during the ticketing process, and the quality of customer service. This score is our best indicator of the provider's quality and reliability.

  • Most accurate provider: When it comes to deals on Detroit-Islip, New York flights, users find the pricing of eDreams to be most consistent on Cheapflights vs. eDreams Users can find the same prices on Detroit-Islip, New York flight deals on Cheapflights vs. eDreams >95% of the time. Price accuracy is based on data collected from Detroit-Islip, New York flight searches over the past month and is updated monthly.
  • Most trusted provider: When it comes to deals on Detroit-Islip, New York flights, Cheapflights users trust eDreams the most. eDreams 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 Detroit-Islip, New York 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 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, March is the cheapest month in which you can book a flight from Detroit to Islip, New York (average of $44). Flying from Detroit to Islip, New York in January is currently the most expensive (average of $98). 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 October 29, 2025.

It’s typically best to fly out from Detroit to Islip, New York in the evening. Doing so could potentially save you 68% on the flight price compared to flying at noon, which is usually more expensive.

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.

  • How long is the flight from Detroit to Islip, New York?

    For as low as $169, Frontier can have you in Islip, New York from Detroit in 10h 16m. Detroit and Islip, New York are separated by a distance of 539 mi.

  • 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, March is the cheapest month in which you can book a flight from Detroit to Islip, New York (average of $44). Flying from Detroit to Islip, New York in January is currently the most expensive (average of $98). 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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