HomeSearch by dateVacation packagesHotelsFlight dealsCar rentalTravel tips & news
Islip

$247+ Cheap flights from Detroit to Islip, NY (DTT - 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 1/9. Fares are subject to change and may not be available on all flights or dates of travel.
DTT — ISP
Jan 13 — Jan 201
Tue 1/13
Tue 1/20
1 adult, Economy
We work with more than 300 partners to bring you better travel deals

Find cheap flights from Detroit to Islip with Cheapflights

1. Tell us where you want to go

Enter your travel information like dates, passengers, trip type (one-way or round trip), and preferred cabin class then click “Find deals”

2. Select your favorite providers

We find the providers serving your travel needs. Choose up to four travel providers to compare side-by-side for flights, hotels, or car rentals.

3. Compare prices and book

Review each provider’s pricing and select the best option for you! Book through your favorite provider’s website for a seamless experience.

Cheap 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 December 14, 2025.

This Frontier deal was found by Cheapflights users on 12/11. 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.
Sun 12/2110:55 amDTW - ISP
1 stop8h 45mFrontier
Tue 12/236:25 amISP - DTW
1 stop7h 28mFrontier
Deal found 12/11$393
This Kiwi.com deal was found by Cheapflights users on 12/14. 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 12/238:46 pmDTW - ISP
2 stops19h 51mMultiple Airlines
Fri 1/22:25 pmISP - DTW
1 stop28h 08mMultiple Airlines
Deal found 12/14$458
This Southwest deal was found by Cheapflights users on 12/14. 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 Southwest is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Tue 12/236:00 pmDTW - ISP
1 stop5h 55mSouthwest
Fri 1/25:50 pmISP - DTW
1 stop6h 30mSouthwest
Deal found 12/14$510
This Kiwi.com deal was found by Cheapflights users on 12/13. 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.
Sun 12/2811:39 amDTW - ISP
1 stop26h 06mMultiple Airlines
Thu 1/12:19 pmISP - DTW
2 stops23h 34mMultiple Airlines
Deal found 12/13$636
This Frontier deal was found by Cheapflights users on 12/13. 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.
Sat 12/2711:01 amDTW - ISP
1 stop12h 58mFrontier
Tue 12/3012:20 pmISP - DTW
1 stop7h 53mFrontier
Deal found 12/13$811

Find 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 December 14, 2025.

Most accurate provider

eDreams
3 stars

Most trusted provider

eDreams
3 stars

Round-trip from

$247
(Trip.com)

Popular in

December

Cheapest in

September

Average price

$192
Provider with most accurate pricing for Detroit (DTT)-Islip Long Island flight deals.
Search Deals
Provider most trusted by Cheapflights users for Detroit (DTT)-Islip Long Island flights.
Search Deals
From Detroit (DTT) to Islip Long Island
Search Deals
Highest demand for flights based on searches. 11% potential increase in price ($20 potential increase over avg. RT price).
Search Deals
Cheapest flight prices on average. 1% potential price decrease ($3 potential savings vs. average RT price).
Search Deals
Average for round-trip flights in December 2025
Search Deals

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 December 14, 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

Fri 1/9

2:06 pm-7:08 pm

2 stops29h 02m

Islip Long Island

Fri 1/16

8:54 pm-1:52 pm

1 stop16h 58m

$247

DetroitIslip

DTW - ISP

DTWISP

Detroit Metropolitan Wayne County

Sun 1/4

10:55 am-7:39 pm

1 stop8h 44m

Islip Long Island

Sun 1/11

8:40 pm-10:33 am

1 stop13h 53m

$427

DetroitIslip

DTW - ISP

DTWISP

Detroit Metropolitan Wayne County

Sun 12/28

11:39 am-1:45 pm

1 stop26h 06m

Islip Long Island

Thu 1/1

2:19 pm-1:53 pm

2 stops23h 34m

$636

DetroitIslip

DTW - ISP

DTWISP

Detroit Metropolitan Wayne County

Sat 12/27

11:01 am-11:59 pm

1 stop12h 58m

Islip Long Island

Tue 12/30

12:20 pm-8:13 pm

1 stop7h 53m

$811

DetroitIslip

DTW - ISP

DTWISP

Detroit Metropolitan Wayne County

Fri 2/20

9:56 am-7:14 pm

1 stop9h 18m

$261

DetroitIslip

DTW - ISP

DTWISP

Detroit Metropolitan Wayne County

Sun 12/21

10:55 am-7:40 pm

1 stop8h 45m

$261

DetroitIslip

DTW - ISP

DTWISP

Detroit Metropolitan Wayne County

Sat 12/20

11:01 am-11:59 pm

1 stop12h 58m

$267

DetroitIslip

DTW - ISP

DTWISP

Detroit Metropolitan Wayne County

Sun 1/4

10:55 am-7:39 pm

1 stop8h 44m

$311

DetroitIslip

DTW - ISP

DTWISP

Detroit Metropolitan Wayne County

Sun 2/22

10:29 pm-7:38 am

1 stop9h 09m

$440

Flights are sorted by cheapest round-trip flights first.

Deals found on 12/12

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 December.
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 February is currently the most expensive (average of $92). 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 December 14, 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 $427, Frontier can have you in Islip, New York from Detroit in 8h 44m. 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 February is currently the most expensive (average of $92). 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

Browse thousands of different options on Cheapflights for your next trip

Toggle through the tabs below to find thousands of options on Cheapflights for your next trip.

Alternative routes for Detroit to Islip

See prices for flight routes from nearby airports that may be better suited for you.
O'Hare Intl to John F Kennedy Intl flights
O'Hare Intl to LaGuardia flights
O'Hare Intl to Newark flights
Detroit to John F Kennedy Intl flights
Midway to John F Kennedy Intl flights
Detroit to LaGuardia flights
Midway to LaGuardia flights
Detroit to Newark flights
Midway to Newark flights
Grand Rapids to LaGuardia flights
Grand Rapids to Newark flights
Grand Rapids to John F Kennedy Intl flights
O'Hare Intl to Buffalo flights
O'Hare Intl to Rochester flights
O'Hare Intl to White Plains flights
O'Hare Intl to Syracuse flights
O'Hare Intl to Albany flights
Detroit to Albany flights
Midway to Rochester flights
South Bend to John F Kennedy Intl flights
South Bend to LaGuardia flights
Midway to Albany flights
Traverse City to John F Kennedy Intl flights
Traverse City to Newark flights
Traverse City to LaGuardia flights
South Bend to Newark flights
Midway to Buffalo flights
Flint to LaGuardia flights
Detroit to White Plains flights
Flint to Newark flights
Detroit to Stewart flights
Midway to Syracuse flights
O'Hare Intl to Islip flights
Kalamazoo to Newark flights
Grand Rapids to Albany flights
Kalamazoo to John F Kennedy Intl flights
Lansing to LaGuardia flights
Bay City to LaGuardia flights
Kalamazoo to LaGuardia flights
Flint to John F Kennedy Intl flights
Midway to White Plains flights
Bay City to Newark flights
O'Hare Intl to Stewart flights
Grand Rapids to Stewart flights
Detroit to Buffalo flights
Detroit to Syracuse flights
Grand Rapids to Buffalo flights
Lansing to John F Kennedy Intl flights
Bay City to John F Kennedy Intl flights
Grand Rapids to White Plains flights

100% Free

Cheapflights is completely free to use, so you can start saving the moment you arrive.

Book with Flexibility

Our users can plan ahead with confidence and find flights with no change fees

Travel Smart

Millions of people come to us for their flight needs every year. We help make travel planning easy by providing useful insights and data-driven graphs that can inform your decisions.