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Islip

$145+ 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 2/4. Fares are subject to change and may not be available on all flights or dates of travel.
DTT — ISP
Feb 28 — Mar 71
Sat 2/28
Sat 3/7
1 adult, Economy
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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 January 29, 2026.

This Kiwi.com deal was found by Cheapflights users on 1/28. 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 2/256:10 pm
DTW
-
ISP
1 stop20h 29m
Multiple Airlines
Sat 2/2811:50 am
ISP
-
DTW
2 stops12h 19m
Multiple Airlines
Deal found 1/28$218
This Kiwi.com deal was found by Cheapflights users on 1/28. 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 2/259:52 am
DTW
-
ISP
1 stop28h 47m
Frontier
Sat 2/285:07 pm
ISP
-
DTW
1 stop15h 45m
Frontier
Deal found 1/28$246
This Southwest deal was found by Cheapflights users on 1/28. 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.
Wed 2/256:50 am
DTW
-
ISP
2 stops9h 25m
Southwest
Sat 2/281:10 pm
ISP
-
DTW
2 stops9h 30m
Southwest
Deal found 1/28$335
This Kiwi.com deal was found by Cheapflights users on 1/28. 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 2/125:09 am
DTW
-
ISP
2 stops32h 22m
Multiple Airlines
Mon 2/163:34 pm
ISP
-
DTW
1 stop20h 04m
Multiple Airlines
Deal found 1/28$385
This Kiwi.com deal was found by Cheapflights users on 1/27. 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.
Wed 2/118:48 pm
DTW
-
ISP
1 stop17h 51m
Multiple Airlines
Sun 2/157:26 pm
ISP
-
DTW
2 stops25h 47m
Multiple Airlines
Deal found 1/27$404
This Southwest deal was found by Cheapflights users on 1/27. 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 Southwest is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Wed 2/115:25 am
DTW
-
ISP
1 stop6h 30m
Southwest
Sun 2/154:05 pm
ISP
-
DTW
1 stop6h 55m
Southwest
Deal found 1/27$457
This Southwest deal was found by Cheapflights users on 1/28. 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.
Thu 2/1212:55 pm
DTW
-
ISP
2 stops10h 35m
Southwest
Mon 2/161:10 pm
ISP
-
DTW
2 stops8h 50m
Southwest
Deal found 1/28$477
This Frontier deal was found by Cheapflights users on 1/28. 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 2/279:55 pm
DTW
-
ISP
1 stop13h 11m
Frontier
Mon 3/28:23 am
ISP
-
DTW
1 stop10h 07m
Frontier
Deal found 1/28$574
This Frontier deal was found by Cheapflights users on 1/27. 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.
Tue 3/314:40 pm
DTW
-
ISP
1 stop8h 41m
Frontier
Mon 4/65:45 am
ISP
-
DTW
1 stop12h 18m
Frontier
Deal found 1/27$718
This Frontier deal was found by Cheapflights users on 1/29. 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.
Fri 2/279:55 pm
DTW
-
ISP
1 stop13h 11m
Frontier
Sun 3/18:33 am
ISP
-
DTW
1 stop7h 07m
Frontier
Deal found 1/29$729

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 January 29, 2026.

Most accurate provider

FlightHub
3 stars

Most trusted provider

FlightHub
3 stars

Round-trip from

$218
(Kiwi.com)

One-way from

$145
(Kiwi.com)

Popular in

November

Cheapest in

February

Average price

$156
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
One-way flight from Detroit (DTT) to Islip Long Island
Search Deals
Highest demand for flights based on searches. 8% potential increase in price ($14 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 January 2026
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 January 29, 2026.
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

Wed 2/25

6:10 pm-2:39 pm

1 stop20h 29m

Islip Long Island

Sat 2/28

11:50 am-12:09 am

2 stops12h 19m

$218

DetroitIslip

DTW - ISP

DTWISP

Detroit Metropolitan Wayne County

Wed 2/25

9:52 am-2:39 pm

1 stop28h 47m

Islip Long Island

Sat 2/28

5:07 pm-8:52 am

1 stop15h 45m

$246

DetroitIslip

DTW - ISP

DTWISP

Detroit Metropolitan Wayne County

Wed 2/25

6:50 am-4:15 pm

2 stops9h 25m

Islip Long Island

Sat 2/28

1:10 pm-10:40 pm

2 stops9h 30m

$335

DetroitIslip

DTW - ISP

DTWISP

Detroit Metropolitan Wayne County

Thu 2/12

5:09 am-1:31 pm

2 stops32h 22m

Islip Long Island

Mon 2/16

3:34 pm-11:38 am

1 stop20h 04m

$385

DetroitIslip

DTW - ISP

DTWISP

Detroit Metropolitan Wayne County

Wed 2/11

8:48 pm-2:39 pm

1 stop17h 51m

Islip Long Island

Sun 2/15

7:26 pm-9:13 pm

2 stops25h 47m

$404

DetroitIslip

DTW - ISP

DTWISP

Detroit Metropolitan Wayne County

Wed 2/11

5:25 am-11:55 am

1 stop6h 30m

Islip Long Island

Sun 2/15

4:05 pm-11:00 pm

1 stop6h 55m

$457

DetroitIslip

DTW - ISP

DTWISP

Detroit Metropolitan Wayne County

Thu 2/12

5:30 am-12:15 pm

1 stop6h 45m

Islip Long Island

Mon 2/16

5:35 pm-11:55 pm

1 stop6h 20m

$467

DetroitIslip

DTW - ISP

DTWISP

Detroit Metropolitan Wayne County

Fri 2/27

9:55 pm-11:06 am

1 stop13h 11m

Islip Long Island

Mon 3/2

8:23 am-6:30 pm

1 stop10h 07m

$574

DetroitIslip

DTW - ISP

DTWISP

Detroit Metropolitan Wayne County

Tue 3/31

4:40 pm-1:21 am

1 stop8h 41m

Islip Long Island

Mon 4/6

5:45 am-6:03 pm

1 stop12h 18m

$718

DetroitIslip

DTW - ISP

DTWISP

Detroit Metropolitan Wayne County

Fri 2/27

9:55 pm-11:06 am

1 stop13h 11m

Islip Long Island

Sun 3/1

8:33 am-3:40 pm

1 stop7h 07m

$729

Flights are sorted by cheapest round-trip flights first.

Deals found on 1/27

Showing 1-10 of 14 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 January.
ProviderPrice AccuracyTrust Score*
ExpediaPrice Accuracy1 starTrust Score*3 stars
FlightHubPrice 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 FlightHub to be most consistent on Cheapflights vs. FlightHub Users can find the same prices on Detroit-Islip, New York flight deals on Cheapflights vs. FlightHub >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 FlightHub the most. FlightHub 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 $46). Flying from Detroit to Islip, New York in December is currently the most expensive (average of $80). 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 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 $335, Frontier can have you in Islip, New York from Detroit in 9h 25m. Detroit and Islip, New York are separated by a distance of 539 mi. Both multi-stop and nonstop flights can be found to your destination and back.

  • 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 $46). Flying from Detroit to Islip, New York in December is currently the most expensive (average of $80). 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

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