$86 Cheap Frontier Airlines flights Detroit (DTW) to Islip (ISP)

View $86 flight on Mon, Nov 17, 2025Opens in a new window

$86 Cheap Frontier Airlines flights Detroit (DTW) to Islip (ISP)

Prices were available within the past 7 days and start at $86 for one-way flights and $120 for round trip, for the period specified. Prices and availability are subject to change. Additional terms apply.

Frontier Airlines
Thu, Nov 13 - Wed, Nov 19
DTW
Detroit
ISP
Islip
$120 Roundtrip, found 5 days ago
$120
Roundtrip
found 5 days ago
Select Frontier Airlines flight, departing Thu, Nov 13 from Detroit to Islip, returning Wed, Nov 19, priced at $120 found 5 days ago
Frontier Airlines
Mon, Nov 17 - Thu, Dec 4
DTW
Detroit
ISP
Islip
$140 Roundtrip, found 1 day ago
$140
Roundtrip
found 1 day ago
Select Frontier Airlines flight, departing Mon, Nov 17 from Detroit to Islip, returning Thu, Dec 4, priced at $140 found 1 day ago
Frontier Airlines
Fri, Nov 14 - Wed, Nov 19
DTW
Detroit
ISP
Islip
$153 Roundtrip, found 5 days ago
$153
Roundtrip
found 5 days ago
Select Frontier Airlines flight, departing Fri, Nov 14 from Detroit to Islip, returning Wed, Nov 19, priced at $153 found 5 days ago
Frontier Airlines
Thu, Dec 11 - Mon, Dec 15
DTW
Detroit
ISP
Islip
$160 Roundtrip, found 10 hours ago
$160
Roundtrip
found 10 hours ago
Select Frontier Airlines flight, departing Thu, Dec 11 from Detroit to Islip, returning Mon, Dec 15, priced at $160 found 10 hours ago
Frontier Airlines
Sun, Nov 16 - Wed, Nov 19
DTW
Detroit
ISP
Islip
$173 Roundtrip, found 5 days ago
$173
Roundtrip
found 5 days ago
Select Frontier Airlines flight, departing Sun, Nov 16 from Detroit to Islip, returning Wed, Nov 19, priced at $173 found 5 days ago
Frontier Airlines
Thu, Dec 4 - Mon, Dec 15
DTW
Detroit
ISP
Islip
$180 Roundtrip, found 1 day ago
$180
Roundtrip
found 1 day ago
Select Frontier Airlines flight, departing Thu, Dec 4 from Detroit to Islip, returning Mon, Dec 15, priced at $180 found 1 day ago
Flights from Detroit (DTW) to Islip (ISP)
Origin airport
Detroit Metropolitan Wayne County
Destination airport
MacArthur
Airlines serving
Frontier Airlines, JetBlue Airways, Southwest Airlines
Popular airline
Frontier Airlines
Distance
539 mi
Average flight time
1 hour 38 mins

Frequently asked questions

How much is a Frontier Airlines flight from Detroit Metropolitan Wayne County Airport (DTW) to MacArthur Airport (ISP)?
Scoring cheap one-way Frontier Airlines flights from DTW to ISP from $86 on Expedia is a cinch — just filter by "Price (lowest to highest)." Or check out our affordable round-trip fares from $120 for your next exciting getaway.**These prices were available on Expedia within the past 7 days, for flights departing within the next year. Prices and availability are subject to change. Additional terms apply.
What is the cheapest month to fly from DTW to ISP with Frontier Airlines?
Frontier Airlines flights to Islip are usually cheaper in the low-season months of January and February. Whether you're in search of a round-trip or one-way ticket, you could land a better deal then.
What is the cheapest time to book flights from Detroit Metropolitan Wayne County Airport (DTW) to MacArthur Airport (ISP) with Frontier Airlines?
Look for cheap Frontier Airlines flights from Detroit Metropolitan Wayne County Airport (DTW) to MacArthur Airport (ISP) one to three months before your day of departure. Travelers who book domestic flights 34 to 86 days in advance can save 25% compared to those who book just 6 to 12 days ahead. No matter the fare type and journey, the best day of the week to book a domestic flight is usually Sunday and the most expensive is typically Monday. Passengers who book on a Sunday can save 6% on average compared to those who book on a Monday.**Ideal booking window recommendation is based on average round-trip ticket prices for January through November for 2024. Best day of the week to book recommendation is based on average round-trip ticket prices for January through October 2024. All data sourced from ARC's global airline sales database.
Does Frontier Airlines fly nonstop from Detroit Metropolitan Wayne County Airport (DTW) to MacArthur Airport (ISP)?
Enter your dates, press search and check "Nonstop" on Expedia to browse any direct flights from DTW to ISP with Frontier Airlines or another carrier.
What is the earliest Frontier Airlines flight from DTW to ISP?
Search Frontier Airlines's earliest flights from DTW to ISP by selecting our "Morning" and "Early Morning" filters. Not only will you get to your destination sooner, early departures also have a 20% less chance of being canceled.**Most reliable time of the day recommendation is based on January through August 2024 flight status data sourced from OAG's global flight data platform.
What airports does Frontier Airlines fly into in Islip?
Frontier Airlines flights from Detroit Metropolitan Wayne County Airport (DTW) to Islip come in to land at MacArthur Airport (ISP). This is the main gateway here.
Why fly with Frontier Airlines from DTW to ISP?
Fly from DTW to ISP with Frontier Airlines and enjoy a host of benefits starting with a rewarding loyalty program. When you book through Expedia as a Frontier Miles and One Key™ member, you could also earn OneKeyCash™* to use on select future travel purchases.*OneKeyCash™ disclaimer - OneKeyCash™ is not redeemable for cash and can only be used on Expedia, Hotels.com and Vrbo.
Can I change or cancel my Frontier Airlines flight from Detroit Metropolitan Wayne County Airport (DTW) to MacArthur Airport (ISP)?
You can usually change or cancel your flight, although there may be a charge if your booking was made more than 24 hours ago. Need to keep your options open? Make use of our "Changes included" or "No cancel fee" filter to find flights that won't charge you extra if you have to revise your plans. To update your itinerary, head to "Trips," select your flight and click on "Manage Booking" for further information.

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*Available to One Key members.