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Islip

$81+ Cheap flights from Colorado to Islip, NY (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 2/10. Fares are subject to change and may not be available on all flights or dates of travel.
DEN — ISP
Feb 20 — Feb 271
Fri 2/20
Fri 2/27
1 adult, Economy
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Cheap 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 January 21, 2026.

This CheapOair deal was found by Cheapflights users on 1/20. 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 2/126:00 am
DEN
-
ISP
1 stop8h 12m
Frontier
Thu 2/193:34 pm
ISP
-
DEN
1 stop9h 25m
Frontier
Deal found 1/20$180
This CheapOair deal was found by Cheapflights users on 1/19. 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 3/411:59 pm
DEN
-
ISP
1 stop12h 40m
Frontier
Mon 3/91:22 pm
ISP
-
DEN
1 stop20h 58m
Frontier
Deal found 1/19$200
This CheapOair deal was found by Cheapflights users on 1/20. 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 2/267:24 pm
DEN
-
ISP
1 stop10h 14m
Frontier
Fri 2/275:07 pm
ISP
-
DEN
1 stop28h 53m
Frontier
Deal found 1/20$215
This CheapOair deal was found by Cheapflights users on 1/20. 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 3/511:59 pm
DEN
-
ISP
1 stop10h 48m
Frontier
Mon 3/91:22 pm
ISP
-
DEN
1 stop11h 47m
Frontier
Deal found 1/20$218
This CheapOair deal was found by Cheapflights users on 1/20. 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 2/249:25 am
DEN
-
ISP
1 stop21h 15m
Frontier
Sat 3/710:43 am
ISP
-
DEN
1 stop22h 35m
Frontier
Deal found 1/20$220
This CheapOair deal was found by Cheapflights users on 1/20. 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 2/2512:05 pm
DEN
-
ISP
1 stop26h 17m
Frontier
Sat 2/2812:01 pm
ISP
-
DEN
1 stop12h 58m
Frontier
Deal found 1/20$222
This CheapOair deal was found by Cheapflights users on 1/19. 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 4/512:13 am
DEN
-
ISP
1 stop22h 10m
Frontier
Mon 4/137:34 pm
ISP
-
DEN
1 stop29h 25m
Frontier
Deal found 1/19$231
This CheapOair deal was found by Cheapflights users on 1/20. 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 2/249:25 am
DEN
-
ISP
1 stop21h 15m
Frontier
Fri 2/275:07 pm
ISP
-
DEN
1 stop24h 45m
Frontier
Deal found 1/20$236
This CheapOair deal was found by Cheapflights users on 1/19. 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.
Sat 1/3111:20 am
DEN
-
ISP
1 stop19h 20m
Frontier
Sun 3/15:07 pm
ISP
-
DEN
1 stop28h 53m
Frontier
Deal found 1/19$237
This Kiwi.com deal was found by Cheapflights users on 1/20. 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.
Fri 2/61:21 pm
DEN
-
ISP
1 stop19h 49m
Multiple Airlines
Mon 2/92:31 pm
ISP
-
DEN
2 stops23h 38m
Multiple Airlines
Deal found 1/20$238

Find flight deals from Colorado to Islip

Keep the following information in mind while searching for Colorado to Islip flight deals. Data was last updated January 21, 2026.

Most accurate provider

CheapOair
3 stars

Most trusted provider

CheapOair
3 stars

Round-trip from

$180
(CheapOair)

One-way from

$81
(CheapOair)

Popular in

March

Cheapest in

January

Average price

$227
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. 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 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 January 21, 2026.
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 2/12

6:00 am-4:12 pm

1 stop8h 12m

Islip Long Island

Thu 2/19

3:34 pm-10:59 pm

1 stop9h 25m

$180

DenverIslip

DEN - ISP

DENISP

Denver Intl

Thu 2/26

7:24 pm-7:38 am

1 stop10h 14m

Islip Long Island

Fri 2/27

5:07 pm-8:00 pm

1 stop28h 53m

$215

DenverIslip

DEN - ISP

DENISP

Denver Intl

Fri 2/27

10:00 am-4:12 pm

1 stop28h 12m

Islip Long Island

Wed 3/4

9:33 am-10:59 pm

1 stop15h 26m

$215

DenverIslip

DEN - ISP

DENISP

Denver Intl

Thu 3/5

11:59 pm-12:47 pm

1 stop10h 48m

Islip Long Island

Mon 3/9

1:22 pm-11:09 pm

1 stop11h 47m

$218

DenverIslip

DEN - ISP

DENISP

Denver Intl

Tue 2/24

9:25 am-8:40 am

1 stop21h 15m

Islip Long Island

Sat 3/7

10:43 am-7:18 am

1 stop22h 35m

$220

DenverIslip

DEN - ISP

DENISP

Denver Intl

Wed 2/25

12:05 pm-4:22 pm

1 stop26h 17m

Islip Long Island

Sat 2/28

12:01 pm-10:59 pm

1 stop12h 58m

$222

DenverIslip

DEN - ISP

DENISP

Denver Intl

Sun 4/5

12:13 am-12:23 am

1 stop22h 10m

Islip Long Island

Mon 4/13

7:34 pm-10:59 pm

1 stop29h 25m

$231

DenverIslip

DEN - ISP

DENISP

Denver Intl

Fri 3/27

12:13 am-9:48 am

1 stop7h 35m

Islip Long Island

Mon 4/13

6:39 pm-10:59 pm

1 stop30h 20m

$249

DenverIslip

DEN - ISP

DENISP

Denver Intl

Fri 2/27

6:00 am-4:12 pm

1 stop8h 12m

Islip Long Island

Sun 3/1

5:07 pm-8:00 pm

1 stop28h 53m

$250

DenverIslip

DEN - ISP

DENISP

Denver Intl

Thu 2/5

8:50 am-8:47 pm

2 stops33h 57m

Islip Long Island

Mon 2/9

2:31 pm-9:49 pm

1 stop9h 18m

$258

Flights are sorted by cheapest round-trip flights first.

Deals found on 1/20

Showing 1-10 of 17 results
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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, New York?

Currently, October is the cheapest month in which you can book a flight from Colorado to Islip, New York (average of $65). Flying from Colorado to Islip, New York in June is currently the most expensive (average of $169). 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 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, New York?

    There are many flights that can get you from Colorado to Islip, New York in 8h 12m. Fly via Frontier to get the fastest option. The distance from Colorado to Islip, New York 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, New York?

    Currently, October is the cheapest month in which you can book a flight from Colorado to Islip, New York (average of $65). Flying from Colorado to Islip, New York in June is currently the most expensive (average of $169). 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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Alternative routes for Colorado to Islip

See prices for flight routes from nearby airports that may be better suited for you.
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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 January 21, 2026.
AirlineCheapestAverageFlexibilityOn-time
SouthwestCheapest$357Average$454FlexibilityNo cancel feeOn-time63%

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