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$136+ Cheap flights from Islip to Detroit (ISP - DTT)

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 12/15. Fares are subject to change and may not be available on all flights or dates of travel.
ISP — DTT
Oct 15 — Oct 221
Wed 10/15
Wed 10/22
1 adult, Economy
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Cheap flight deals from Islip to Detroit

Discover tips and strategies to find the most affordable flight options for your journey from Islip (ISP) to Detroit (DTT). 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 15, 2025.

Round-trip from

$273
(Trip.com)

One-way from

$136
(Cheapflightsfares)

Popular in

December

Cheapest in

January

Average price

$250
From Islip Long Island to Detroit (DTT)
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One-way flight from Islip Long Island to Detroit (DTT)
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Highest demand for flights based on searches. 9% potential increase in price ($22 potential increase over avg. RT price).
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Cheapest flight prices on average. 3% potential price decrease ($8 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 Islip to Detroit

Cheapest flights from Islip to Detroit
Explore the most affordable flight options available from Islip to Detroit. Find the lowest fares from popular airlines and budget airlines, with prices last updated on September 15, 2025.

This Trip.com deal was found by Cheapflights users on 9/13. 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 Trip.com is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Sun 9/2811:25 amISP - DTW
1 stop21h 19mFrontier
Thu 10/21:36 pmDTW - ISP
1 stop21h 04mFrontier
Deal found 9/13$273
This Kiwi.com deal was found by Cheapflights users on 9/13. 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 9/287:36 pmISP - DTW
2 stops36h 38mMultiple Airlines
Thu 10/21:36 pmDTW - ISP
1 stop21h 04mMultiple Airlines
Deal found 9/13$283
This Southwest deal was found by Cheapflights users on 9/13. 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 Southwest is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Wed 11/55:40 amISP - DTW
1 stop6h 45mSouthwest
Mon 11/105:35 amDTW - ISP
1 stop7h 15mSouthwest
Deal found 9/13$292
This Southwest deal was found by Cheapflights users on 9/14. 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.
Fri 10/3111:25 amISP - DTW
1 stop10h 00mSouthwest
Sun 11/25:35 amDTW - ISP
1 stop7h 15mSouthwest
Deal found 9/14$352
This Southwest deal was found by Cheapflights users on 9/14. 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.
Sat 11/225:30 amISP - DTW
1 stop6h 35mSouthwest
Sun 11/2312:50 pmDTW - ISP
2 stops11h 00mSouthwest
Deal found 9/14$377
This Southwest deal was found by Cheapflights users on 9/14. 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.
Fri 11/285:30 pmISP - DTW
1 stop6h 35mSouthwest
Mon 12/16:00 pmDTW - ISP
1 stop5h 55mSouthwest
Deal found 9/14$537

Cheapflights Fare Finder

 
Customize your flight search to find flights from Islip to Detroit 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 15, 2025.
Use the filters below to find and compare flights from Islip to Detroit that are best for you.

Fly from

Islip

Fly to

Detroit

Route

Depart

Return

Price

IslipDetroit

ISP - DTW

ISPDTW

Islip Long Island

Sun 9/28

11:25 am-8:44 am

1 stop21h 19m

Detroit Metropolitan Wayne County

Thu 10/2

1:36 pm-10:40 am

1 stop21h 04m

$273

IslipDetroit

ISP - DTW

ISPDTW

Islip Long Island

Sun 9/28

7:36 pm-8:14 am

2 stops36h 38m

Detroit Metropolitan Wayne County

Thu 10/2

1:36 pm-10:40 am

1 stop21h 04m

$283

IslipDetroit

ISP - DTW

ISPDTW

Islip Long Island

Wed 11/5

5:40 am-12:25 pm

1 stop6h 45m

Detroit Metropolitan Wayne County

Mon 11/10

5:35 am-12:50 pm

1 stop7h 15m

$292

IslipDetroit

ISP - DTW

ISPDTW

Islip Long Island

Sat 11/22

5:30 am-12:05 pm

1 stop6h 35m

Detroit Metropolitan Wayne County

Sun 11/23

12:50 pm-11:50 pm

2 stops11h 00m

$377

IslipDetroit

ISP - DTW

ISPDTW

Islip Long Island

Fri 10/31

11:25 am-9:25 pm

1 stop10h 00m

Detroit Metropolitan Wayne County

Sun 11/2

12:50 pm-11:50 pm

2 stops11h 00m

$392

IslipDetroit

ISP - DTW

ISPDTW

Islip Long Island

Fri 11/28

5:30 pm-12:05 am

1 stop6h 35m

Detroit Metropolitan Wayne County

Mon 12/1

6:00 pm-11:55 pm

1 stop5h 55m

$537

IslipDetroit

ISP - DTW

ISPDTW

Islip Long Island

Mon 12/15

10:06 am-5:23 pm

1 stop7h 17m

$136

IslipDetroit

ISP - DTW

ISPDTW

Islip Long Island

Tue 12/23

5:45 am-12:53 pm

1 stop7h 08m

$323

IslipDetroit

ISP - DTW

ISPDTW

Islip Long Island

Wed 11/26

11:03 am-6:08 pm

1 stop7h 05m

$323

IslipDetroit

ISP - DTW

ISPDTW

Islip Long Island

Sun 12/21

10:16 am-4:58 pm

1 stop6h 42m

$323

Flights are sorted by cheapest round-trip flights first.

Deals found on 9/14

Showing 1-10 of 11 results
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Best time to book a flight from Islip to Detroit

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

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

Currently, August is the cheapest month in which you can book a flight from Islip to Detroit (average of $250). Flying from Islip to Detroit in March is currently the most expensive (average of $305). 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 Islip to Detroit. 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 Islip to Detroit?

    Departing from Islip to Detroit will take you 6h 45m. The distance between Islip and Detroit is about 539 mi. This flight may include one or multiple stops.

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

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

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

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

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

    Yes. Cheapflights offers flight deals from Islip to Detroit 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 Islip to Detroit?

    Currently, August is the cheapest month in which you can book a flight from Islip to Detroit (average of $250). Flying from Islip to Detroit in March is currently the most expensive (average of $305). 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 Detroit?

Book flights to Detroit if you plan to visit one of these locations
Roseville
Port Huron

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