$82 Cheap Flights from Denver (DEN) to Islip (ISP)

View $82 flight on Sat, May 2, 2026Opens in a new window

Popular airlines from Denver Intl. Airport (DEN) to MacArthur Airport (ISP)

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Cheap Flights from Denver to Islip (DEN-ISP)

Prices were available within the past 7 days and start at $82 for one-way flights and $230 for round trip, for the period specified. Prices and availability are subject to change. Additional terms apply.

Frontier Airlines
Fri, May 29 - Wed, Jun 10
DEN
Denver
ISP
Islip
$230 Roundtrip, found 11 hours ago
$230
Roundtrip
found 11 hours ago
Select Frontier Airlines flight, departing Fri, May 29 from Denver to Islip, returning Wed, Jun 10, priced at $230 found 11 hours ago
Frontier Airlines
Fri, Apr 24 - Fri, May 1
DEN
Denver
ISP
Islip
$235 Roundtrip, found 10 hours ago
$235
Roundtrip
found 10 hours ago
Select Frontier Airlines flight, departing Fri, Apr 24 from Denver to Islip, returning Fri, May 1, priced at $235 found 10 hours ago
Frontier Airlines
Sat, Apr 25 - Fri, May 1
DEN
Denver
ISP
Islip
$236 Roundtrip, found 4 days ago
$236
Roundtrip
found 4 days ago
Select Frontier Airlines flight, departing Sat, Apr 25 from Denver to Islip, returning Fri, May 1, priced at $236 found 4 days ago
Frontier Airlines
Wed, Jul 15 - Thu, Jul 23
DEN
Denver
ISP
Islip
$250 Roundtrip, found 5 hours ago
$250
Roundtrip
found 5 hours ago
Select Frontier Airlines flight, departing Wed, Jul 15 from Denver to Islip, returning Thu, Jul 23, priced at $250 found 5 hours ago
Frontier Airlines
Thu, Apr 23 - Mon, Apr 27
DEN
Denver
ISP
Islip
$252 Roundtrip, found 3 days ago
$252
Roundtrip
found 3 days ago
Select Frontier Airlines flight, departing Thu, Apr 23 from Denver to Islip, returning Mon, Apr 27, priced at $252 found 3 days ago
Frontier Airlines
Fri, May 29 - Mon, Jun 1
DEN
Denver
ISP
Islip
$260 Roundtrip, found 2 days ago
$260
Roundtrip
found 2 days ago
Select Frontier Airlines flight, departing Fri, May 29 from Denver to Islip, returning Mon, Jun 1, priced at $260 found 2 days ago
Frontier Airlines
Fri, Apr 24 - Sun, Apr 26
DEN
Denver
ISP
Islip
$261 Roundtrip, found 1 day ago
$261
Roundtrip
found 1 day ago
Select Frontier Airlines flight, departing Fri, Apr 24 from Denver to Islip, returning Sun, Apr 26, priced at $261 found 1 day ago
Frontier Airlines
Sun, Apr 19 - Thu, Apr 23
DEN
Denver
ISP
Islip
$270 Roundtrip, found 4 days ago
$270
Roundtrip
found 4 days ago
Select Frontier Airlines flight, departing Sun, Apr 19 from Denver to Islip, returning Thu, Apr 23, priced at $270 found 4 days ago
Southwest Airlines
Tue, May 5 - Wed, May 6
DEN
Denver
ISP
Islip
$383 Roundtrip, found 1 day ago
$383
Roundtrip
found 1 day ago
Select Southwest Airlines flight, departing Tue, May 5 from Denver to Islip, returning Wed, May 6, priced at $383 found 1 day ago
JetBlue Airways
Fri, Jun 12 - Mon, Jun 15
DEN
Denver
ISP
Islip
$754 Roundtrip, found 4 days ago
$754
Roundtrip
found 4 days ago
Select JetBlue Airways flight, departing Fri, Jun 12 from Denver to Islip, returning Mon, Jun 15, priced at $754 found 4 days ago

Alternative airports near Islip

Prices were available within the past 7 days. Prices and availability are subject to change.

Select flight to MacArthur ISP. Cheapest and Closest option available. Average driving time to city center is 14 minutes. Flights from $230
ISP
MacArthur
CheapestClosest
Average driving time to city center14 min
Flights from $230

Frequently asked questions

How much does a flight from Denver, CO (DEN-Denver Intl.) to Islip, NY (ISP-MacArthur) cost?
You can find cheap one-way flights from $82 and cheap return flights from $230 Denver, CO (DEN-Denver Intl.) to Islip, NY (ISP-MacArthur) with Expedia. One-way flights usually range from $191 to $742, and return flights typically cost between $450 and $1780. Flight prices vary based on the month and day of the week you want to travel, as well as the airline and how far in advance you book your ticket. Filter your search on Expedia by "Price (lowest to highest)" to see the cheapest fares first, and use the Price Tracking tool to receive alerts when Denver, CO (DEN-Denver Intl.) to Islip, NY (ISP-MacArthur) ticket fares go up or down.*Typical price ranges based on flights available on Expedia in the last year. Prices include multi-airline options.
What is the cheapest month to fly from Denver, CO (DEN-Denver Intl.) to Islip, NY (ISP-MacArthur)?
The cheapest month to fly from DEN to ISP is May when demand is low. Traveling in off-peak or shoulder months is usually a good way to secure cheap tickets, just remember to avoid flying during holidays if you're able to. Use the calendar view in your search to see which months have low fares on this route.
Which airlines fly direct from Denver, CO (DEN-Denver Intl.) to Islip, NY (ISP-MacArthur)?
Enter DEN to ISP and your travel dates, then apply the 'Nonstop' filter to see only direct flights.
What is the cheapest airline that flies from Denver, CO (DEN-Denver Intl.) to Islip, NY (ISP-MacArthur)?
Southwest Airlines is one of the cheapest airlines offering connecting flights from Denver Intl. (DEN) to MacArthur (ISP), with round-trip tickets starting from around $297.41 with a layover in Norfolk Intl. (ORF). Use Expedia's search tool to compare the prices and schedules of airlines that fly this route to find the best option for your plans and budget.*Prices based on flights available on Expedia in the last year.
How do I find cheap flights from Denver, CO (DEN-Denver Intl.) to Islip, NY (ISP-MacArthur)?
To find a cheap flight from Denver, CO (DEN-Denver Intl.) to Islip, NY (ISP-MacArthur), be flexible with your dates. Traveling outside of peak vacation months and booking a mid-week flight can help you save. Early morning and late night flights are often more affordable, too. Expedia allows you to compare flight times, airlines and routes all in one place to find low fares. You can also set up Price Tracking and receive alerts when fares go up or down.
What is the best time to fly from Denver, CO (DEN-Denver Intl.) to Islip, NY (ISP-MacArthur)?
The best time to fly is usually mid-week (Tuesday or Wednesday) and during early morning hours as flights tend to be cheaper, less crowded, and generally more on-time. Avoid major holidays and peak vacation seasons for smoother travel. Combining off-peak days and hours often gives the best combination of cost, comfort, and convenience.
What is the earliest flight from Denver, CO (DEN-Denver Intl.) to Islip, NY (ISP-MacArthur)?
The earliest flight from Denver International Airport (DEN) to Islip, New York (ISP) typically departs at 12:00 AM local time, operated by Frontier Airlines. This is a seasonal service, so if you're planning to travel, be sure to check availability during the active months. An early departure can help you make the most of your day upon arrival. To compare early flights on Expedia, select the "Early Morning" and "Morning" filters in your search.
What are the most popular departure times for flights from Denver, CO (DEN-Denver Intl.) to Islip, NY (ISP-MacArthur)?
The most popular departure times for flights from Denver Intl. (DEN) to MacArthur (ISP) are in the early morning, from 6am to 9am. About 33% of passengers prefer this time window. Many major carriers, including United Airlines, Southwest Airlines and Southwest Airlines, offer flights during this window. This timing is great for those looking to make the most of their day in Islip.
How long does it take to fly from Denver, CO (DEN-Denver Intl.) to Islip, NY (ISP-MacArthur)?
Flying from DEN to ISP with a connection usually takes about 9 hours, traveling roughly 1,656 miles. Keep in mind that actual flight times can vary due to wind patterns, weather, and air traffic.
Can you fly business or first class from Denver, CO (DEN-Denver Intl.) to Islip, NY (ISP-MacArthur)?
Select the "Business class" and "First class" filters when looking for DEN to ISP flights on Expedia. This is the easiest way to compare prices, routes and flight times for your trip.
How do I earn miles on a Denver, CO (DEN-Denver Intl.) to Islip, NY (ISP-MacArthur) flight with Expedia?
It's easy to earn miles on a Denver, CO (DEN-Denver Intl.) to Islip, NY (ISP-MacArthur) flight when you book with Expedia. Before you confirm your booking, simply select your frequent flyer program and enter your program number. As a member of One Key™, you can also earn OneKeyCash™* on top of your airline miles when you book with Expedia.*Excludes taxes and fees. OneKeyCash is not redeemable for cash and can only be used on Expedia and other participating brands.
What airports do you fly into for Islip from Denver Intl. (DEN)?
From Denver Intl. (DEN), you can fly into MacArthur (ISP) to reach Islip. Some flights may connect through major hubs like Kansas City Intl. (MCI), Nashville Intl. (BNA), William P. Hobby (HOU) before reaching Islip. Compare routes and airports on Expedia to find the best flight options for your travel plans.
Is it cheaper to buy a plane ticket from Denver, CO (DEN-Denver Intl.) to Islip, NY (ISP-MacArthur) at the last minute?
Typically, booking a last minute flight from Denver, CO (DEN-Denver Intl.) to Islip, NY (ISP-MacArthur) will be more expensive than booking in advance. As the departure date approaches, there are usually fewer seats available which can drive up the cost. However, if there's some wiggle room with your travel dates and times, you could bag a cheap last-minute fare.
Is it cheaper to book a Denver, CO (DEN-Denver Intl.) to Islip, NY (ISP-MacArthur) flight and hotel package?
Securing a Denver, CO (DEN-Denver Intl.) to Islip, NY (ISP-MacArthur) flight and hotel package is usually cheaper than booking separately. With Expedia, you can enjoy the ease of organizing your travels all in one place. Select from our extensive range of stays and then add flights, activities and car rentals to your booking. Bundle everything together, and you could save hundreds of dollars.
Can I cancel or change the date of my flight from Denver, CO (DEN-Denver Intl.) to Islip, NY (ISP-MacArthur)?
If you booked your Denver, CO (DEN-Denver Intl.) to Islip, NY (ISP-MacArthur) flight within the last 24 hours, you may be able to modify or cancel it without any fees. Depending on the airline and the type of ticket you have, additional charges may apply for changes beyond this timeframe. Airline policies and contact information can be found in your itinerary or confirmation email. Or, head to our Customer Service portal if you'd like more information.

Travel information

Origin airport
Denver Intl.
Destination airport
MacArthur
Airlines serving
Frontier Airlines, JetBlue Airways, Southwest Airlines
Roundtrip price
$225
Distance
1655 mi
Average flight time
6 hours 50 mins

*Flight schedules are subject to change.

*Available to One Key members.

 

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