HomeSearch by dateVacation packagesHotelsFlight dealsCar rentalTravel tips & news
Islip

$54+ Cheap flights from Colorado to Islip (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 11/11. Fares are subject to change and may not be available on all flights or dates of travel.
DEN — ISP
Nov 13 — Nov 201
Thu 11/13
Thu 11/20
1 adult, Economy
We work with more than 300 partners to bring you better travel deals

Find cheap flights from Colorado 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 Colorado to Islip

Keep the following information in mind while searching for Colorado to Islip flight deals. Data was last updated October 14, 2025.

Most accurate provider

FlightHub
3 stars

Most trusted provider

FlightHub
3 stars

Round-trip from

$155
(CheapOair)

One-way from

$54
(Frontier)

Popular in

March

Cheapest in

January

Average price

$262
Provider with most accurate pricing for Denver Intl-New York (NYC) flight deals.
Search Deals
Provider most trusted by Cheapflights users for Denver Intl-New York (NYC) flights.
Search Deals
From Colorado to Islip Long Island
Search Deals
One-way flight from Colorado to Islip Long Island
Search Deals
Highest demand for flights based on searches. 5% potential increase in price ($16 potential increase over avg. RT price).
Search Deals
Cheapest flight prices on average. 0% potential price decrease ($2 potential savings vs. average RT price).
Search Deals
Average for round-trip flights in October 2025
Search Deals

Find flight deals from Colorado to Islip

Cheapest flights from Colorado to Islip
Explore the most affordable flight options available from Colorado to Islip. Find the lowest fares from popular airlines and budget airlines, with prices last updated on October 14, 2025.

This CheapOair deal was found by Cheapflights users on 10/12. 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 CheapOair is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Thu 10/3011:59 pmDEN - ISP
1 stop7h 10mFrontier
Sun 11/28:49 amISP - DEN
1 stop25h 54mFrontier
Deal found 10/12$155
This CheapOair deal was found by Cheapflights users on 10/13. 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 CheapOair is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Mon 10/2712:16 amDEN - ISP
1 stop15h 26mFrontier
Tue 11/46:27 pmISP - DEN
1 stop30h 49mFrontier
Deal found 10/13$180
This CheapOair deal was found by Cheapflights users on 10/12. 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 CheapOair is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Thu 10/2311:59 pmDEN - ISP
1 stop7h 05mFrontier
Sun 11/28:49 amISP - DEN
1 stop25h 54mFrontier
Deal found 10/12$225
This CheapOair deal was found by Cheapflights users on 10/13. 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 CheapOair is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Wed 12/109:19 amDEN - ISP
1 stop7h 55mFrontier
Sun 12/149:09 pmISP - DEN
1 stop13h 15mFrontier
Deal found 10/13$238
This CheapOair deal was found by Cheapflights users on 10/14. 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 CheapOair is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Tue 10/2812:16 amDEN - ISP
1 stop8h 21mFrontier
Wed 10/294:58 pmISP - DEN
1 stop17h 17mFrontier
Deal found 10/14$252
This CheapOair deal was found by Cheapflights users on 10/13. 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 CheapOair is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Sun 10/2612:25 amDEN - ISP
1 stop8h 12mFrontier
Tue 11/46:27 pmISP - DEN
1 stop30h 49mFrontier
Deal found 10/13$257
This CheapOair deal was found by Cheapflights users on 10/14. 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 CheapOair is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Mon 11/1012:16 amDEN - ISP
1 stop15h 26mFrontier
Tue 11/186:27 pmISP - DEN
1 stop30h 49mFrontier
Deal found 10/14$273
This Frontier deal was found by Cheapflights users on 10/13. 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.
Mon 10/2011:59 pmDEN - ISP
1 stop7h 45mFrontier
Mon 10/274:58 pmISP - DEN
1 stop8h 18mFrontier
Deal found 10/13$275
This CheapOair deal was found by Cheapflights users on 10/13. 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 CheapOair is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Wed 10/2212:36 amDEN - ISP
1 stop18h 06mFrontier
Sat 10/254:58 pmISP - DEN
1 stop8h 18mFrontier
Deal found 10/13$277
This CheapOair deal was found by Cheapflights users on 10/14. 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 CheapOair is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Wed 10/2212:36 amDEN - ISP
1 stop18h 06mFrontier
Sun 10/269:47 pmISP - DEN
1 stop27h 29mFrontier
Deal found 10/14$284
This CheapOair deal was found by Cheapflights users on 10/14. 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 CheapOair is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Fri 12/1212:59 amDEN - ISP
1 stop16h 07mFrontier
Wed 12/178:09 pmISP - DEN
1 stop14h 15mFrontier
Deal found 10/14$305

Cheapflights Fare Finder

 
Customize your flight search to find flights from Colorado 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 October 14, 2025.
Use the filters below to find and compare flights from Colorado to Islip that are best for you.

Fly from

Colorado

Fly to

Islip

Route

Depart

Return

Price

DenverIslip

DEN - ISP

DENISP

Denver Intl

Thu 10/30

11:59 pm-9:09 am

1 stop7h 10m

Islip Long Island

Sun 11/2

8:49 am-8:43 am

1 stop25h 54m

$155

DenverIslip

DEN - ISP

DENISP

Denver Intl

Mon 10/27

12:16 am-5:42 pm

1 stop15h 26m

Islip Long Island

Tue 11/4

6:27 pm-11:16 pm

1 stop30h 49m

$180

DenverIslip

DEN - ISP

DENISP

Denver Intl

Thu 12/11

6:02 pm-9:11 am

1 stop13h 09m

Islip Long Island

Fri 12/12

9:09 pm-8:24 am

1 stop13h 15m

$238

DenverIslip

DEN - ISP

DENISP

Denver Intl

Fri 10/31

11:59 pm-10:55 am

1 stop8h 56m

Islip Long Island

Sun 11/2

9:27 pm-11:16 pm

1 stop27h 49m

$252

DenverIslip

DEN - ISP

DENISP

Denver Intl

Sun 11/2

11:59 pm-9:09 am

1 stop7h 10m

Islip Long Island

Sat 11/8

4:58 pm-11:16 pm

1 stop8h 18m

$252

DenverIslip

DEN - ISP

DENISP

Denver Intl

Tue 10/28

12:16 am-10:37 am

1 stop8h 21m

Islip Long Island

Wed 10/29

4:58 pm-8:15 am

1 stop17h 17m

$252

DenverIslip

DEN - ISP

DENISP

Denver Intl

Tue 10/28

12:16 am-10:37 am

1 stop8h 21m

Islip Long Island

Sun 11/2

9:27 pm-8:15 am

1 stop12h 48m

$252

DenverIslip

DEN - ISP

DENISP

Denver Intl

Sun 10/26

12:25 am-10:37 am

1 stop8h 12m

Islip Long Island

Tue 11/4

6:27 pm-11:16 pm

1 stop30h 49m

$257

DenverIslip

DEN - ISP

DENISP

Denver Intl

Thu 11/13

12:16 am-10:37 am

1 stop8h 21m

Islip Long Island

Sun 11/16

9:27 pm-11:16 pm

1 stop27h 49m

$277

DenverIslip

DEN - ISP

DENISP

Denver Intl

Sun 10/26

12:25 am-10:37 am

1 stop8h 12m

Islip Long Island

Wed 10/29

4:58 pm-8:15 am

1 stop17h 17m

$277

Flights are sorted by cheapest round-trip flights first.

Deals found on 10/12

Showing 1-10 of 24 results
1
2
3

Best time to book a flight from Colorado to Islip

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

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

Currently, November is the cheapest month in which you can book a flight from Colorado to Islip (average of $85). Flying from Colorado to Islip in June is currently the most expensive (average of $168). 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 CO to ISP?

Find hourly flight availability from Colorado 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 October 14, 2025.

Unlike at noon, when flights are generally more expensive, you can save up to 58% on flights from Colorado to Islip by exploring options for tickets in the evening.

Related info for your journey

Find useful and relevant information for your journey from Colorado to Islip. Access travel guides, tips, and recommendations to enhance your travel experience. Get information about local attractions, weather, transportation options, and more.

  • What airport do you fly into for flights to Islip from Colorado?

    Islip Long Island (ISP) is the airport you will fly into if you book a flight from Colorado to Islip. It is only a 7.2 mi journey from Long Island (ISP) to Islip’s city center.

  • How long is the flight from Colorado to Islip?

    Departing from Colorado to Islip will take you 7h 10m. The distance from Colorado to Islip is about 1654 mi.

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

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

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

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

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

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

    Currently, November is the cheapest month in which you can book a flight from Colorado to Islip (average of $85). Flying from Colorado to Islip in June is currently the most expensive (average of $168). 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
Southampton

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 Colorado to Islip

See prices for flight routes from nearby airports that may be better suited for you.
Los Angeles to John F Kennedy Intl flights
Dallas/Fort Worth to John F Kennedy Intl flights
Dallas/Fort Worth to LaGuardia flights
Los Angeles to Newark flights
O'Hare Intl to John F Kennedy Intl flights
San Francisco to John F Kennedy Intl flights
Dallas/Fort Worth to Newark flights
Orlando to John F Kennedy Intl flights
San Francisco to Newark flights
Los Angeles to LaGuardia flights
Atlanta to John F Kennedy Intl flights
Miami to John F Kennedy Intl flights
Hobby to Newark flights
Atlanta to LaGuardia flights
Hobby to John F Kennedy Intl flights
Tampa to John F Kennedy Intl flights
O'Hare Intl to LaGuardia flights
Seattle to John F Kennedy Intl flights
Fort Lauderdale to John F Kennedy Intl flights
Hobby to LaGuardia flights
Fort Lauderdale to Newark flights
Fort Lauderdale to LaGuardia flights
O'Hare Intl to Newark flights
Miami to LaGuardia flights
George Bush Intcntl to John F Kennedy Intl flights
San Francisco to LaGuardia flights
Orlando to LaGuardia flights
Denver to John F Kennedy Intl flights
Tampa to LaGuardia flights
Atlanta to Newark flights
George Bush Intcntl to Newark flights
Denver to LaGuardia flights
Seattle to Newark flights
Raleigh to LaGuardia flights
Miami to Newark flights
Raleigh to John F Kennedy Intl flights
San Diego to John F Kennedy Intl flights
Minneapolis to John F Kennedy Intl flights
Austin to John F Kennedy Intl flights
Austin to Newark flights
Sky Harbor Intl to John F Kennedy Intl flights
Detroit to John F Kennedy Intl flights
Tampa to Newark flights
George Bush Intcntl to LaGuardia flights
Charlotte to John F Kennedy Intl flights
Orlando to Newark flights
Minneapolis to LaGuardia flights
Seattle to LaGuardia flights
Ontario to John F Kennedy Intl flights
Denver to Newark flights

Top airline flying from Colorado to Islip

Discover the top airline that operate flights from Colorado to Islip. Compare their services, reliability, and customer satisfaction ratings to choose the airline that best suits your travel preferences and needs. Over the last 7 days, Cheapflights users made 2,558,603 searches. Data last updated October 14, 2025.
AirlineCheapestAverageFlexibilityOn-time
SouthwestCheapest$357Average$495FlexibilityNo cancel feeOn-time63%

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.