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Islip

$100+ 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 11/2. Fares are subject to change and may not be available on all flights or dates of travel.
DEN — ISP
Aug 31 — Sep 71
Sun 8/31
Sun 9/7
1 adult, Economy
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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 August 26, 2025.

Round-trip from

$169
(CheapOair)

One-way from

$100
(Cheapflightsfares)

Popular in

March

Cheapest in

September

Average price

$267
From Colorado to Islip Long Island
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One-way flight from Colorado to Islip Long Island
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Highest demand for flights based on searches. 6% potential increase in price ($18 potential increase over avg. RT price).
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Cheapest flight prices on average. 0% potential price decrease ($2 potential savings vs. average RT price).
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Average for round-trip flights in August 2025
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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 August 26, 2025.

This CheapOair deal was found by Cheapflights users on 8/23. 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 10/212:04 amDEN - ISP
1 stop8h 36mFrontier
Mon 10/62:32 pmISP - DEN
1 stop22h 08mFrontier
Deal found 8/23$169
This CheapOair deal was found by Cheapflights users on 8/25. 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 9/611:59 pmDEN - ISP
1 stop14h 28mFrontier
Sat 9/275:05 pmISP - DEN
1 stop8h 08mFrontier
Deal found 8/25$186
This Cheapflightsfares deal was found by Cheapflights users on 8/25. 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 Cheapflightsfares is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Sat 9/611:59 pmDEN - ISP
1 stop7h 05mFrontier
Fri 9/265:05 pmISP - DEN
1 stop8h 08mFrontier
Deal found 8/25$200
This CheapOair deal was found by Cheapflights users on 8/25. 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 9/412:04 amDEN - ISP
1 stop8h 36mFrontier
Sun 9/711:35 amISP - DEN
1 stop22h 34mFrontier
Deal found 8/25$201
This Frontier deal was found by Cheapflights users on 8/24. 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.
Thu 9/1811:59 pmDEN - ISP
1 stop7h 05mFrontier
Sat 9/275:05 pmISP - DEN
1 stop8h 08mFrontier
Deal found 8/24$202
This Cheapflightsfares deal was found by Cheapflights users on 8/25. 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 Cheapflightsfares is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Sat 9/611:59 pmDEN - ISP
1 stop7h 05mFrontier
Sat 9/135:05 pmISP - DEN
1 stop8h 08mFrontier
Deal found 8/25$205
This FlightHub deal was found by Cheapflights users on 8/25. 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 FlightHub is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Fri 9/1912:04 amDEN - ISP
1 stop8h 51mFrontier
Tue 9/2311:25 amISP - DEN
1 stop24h 49mFrontier
Deal found 8/25$209
This Expedia deal was found by Cheapflights users on 8/26. 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 Expedia is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Fri 9/267:01 pmDEN - ISP
1 stop13h 54mFrontier
Fri 10/35:05 pmISP - DEN
1 stop8h 08mFrontier
Deal found 8/26$212
This Cheapflightsfares deal was found by Cheapflights users on 8/24. 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 Cheapflightsfares is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Sat 10/411:59 pmDEN - ISP
1 stop7h 05mFrontier
Mon 10/65:05 pmISP - DEN
1 stop8h 08mFrontier
Deal found 8/24$220
This Frontier deal was found by Cheapflights users on 8/25. 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.
Thu 9/2512:04 amDEN - ISP
1 stop8h 36mFrontier
Mon 9/295:05 pmISP - DEN
1 stop8h 08mFrontier
Deal found 8/25$222
This Cheapflightsfares deal was found by Cheapflights users on 8/24. 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 Cheapflightsfares is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Thu 9/411:59 pmDEN - ISP
1 stop7h 05mFrontier
Fri 9/125:05 pmISP - DEN
1 stop8h 08mFrontier
Deal found 8/24$225
This Southwest deal was found by Cheapflights users on 8/26. 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.
Sun 9/712:20 pmCOS - ISP
1 stop5h 30mSouthwest
Fri 9/123:05 pmISP - COS
2 stops9h 30mSouthwest
Deal found 8/26$731

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 August 26, 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

Fri 10/3

11:59 pm-4:23 pm

1 stop14h 24m

Islip Long Island

Mon 10/6

2:32 pm-10:40 am

1 stop22h 08m

$169

DenverIslip

DEN - ISP

DENISP

Denver Intl

Thu 9/11

12:04 am-10:40 am

1 stop8h 36m

Islip Long Island

Fri 9/26

5:05 pm-11:13 pm

1 stop8h 08m

$169

DenverIslip

DEN - ISP

DENISP

Denver Intl

Thu 10/2

11:20 am-9:04 am

1 stop19h 44m

Islip Long Island

Tue 10/7

9:37 pm-12:44 pm

1 stop17h 07m

$169

DenverIslip

DEN - ISP

DENISP

Denver Intl

Fri 10/31

9:05 am-10:37 am

1 stop23h 32m

Islip Long Island

Sun 11/2

9:27 pm-11:16 pm

1 stop27h 49m

$169

DenverIslip

DEN - ISP

DENISP

Denver Intl

Wed 10/1

11:19 am-10:55 am

1 stop21h 36m

Islip Long Island

Fri 10/3

5:05 pm-8:54 am

1 stop17h 49m

$169

DenverIslip

DEN - ISP

DENISP

Denver Intl

Fri 9/26

7:01 pm-10:55 am

1 stop13h 54m

Islip Long Island

Tue 9/30

11:25 am-10:14 am

1 stop24h 49m

$169

DenverIslip

DEN - ISP

DENISP

Denver Intl

Thu 9/18

12:04 am-10:40 am

1 stop8h 36m

Islip Long Island

Tue 9/23

11:25 am-10:14 am

1 stop24h 49m

$169

DenverIslip

DEN - ISP

DENISP

Denver Intl

Sun 9/14

11:59 pm-4:27 pm

1 stop14h 28m

Islip Long Island

Sun 9/21

9:49 am-8:04 pm

1 stop12h 15m

$169

DenverIslip

DEN - ISP

DENISP

Denver Intl

Thu 9/25

11:59 pm-9:04 am

1 stop7h 05m

Islip Long Island

Sun 9/28

11:25 am-8:09 am

1 stop22h 44m

$169

Colorado SpringsIslip

COS - ISP

COSISP

Colorado Springs

Sun 9/7

12:20 pm-7:50 pm

1 stop5h 30m

Islip Long Island

Fri 9/12

3:05 pm-10:35 pm

2 stops9h 30m

$731

Flights are sorted by cheapest round-trip flights first.

Deals found on 8/24

Showing 1-10 of 19 results
1
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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?

Currently, January is the cheapest month in which you can book a flight from Colorado to Islip (average of $108). Flying from Colorado to Islip in November is currently the most expensive (average of $213). 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 August 26, 2025.

Regardless of the time of day you decide to fly, the ticket price will remain around the same. Book flights from Colorado to Islip as you normally would.

How much does it cost to fly round-trip from Colorado to Islip?

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 14h 24m. 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, January is the cheapest month in which you can book a flight from Colorado to Islip (average of $108). Flying from Colorado to Islip in November is currently the most expensive (average of $213). 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

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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 August 26, 2025.
AirlineCheapestAverageFlexibilityOn-time
SouthwestCheapest$357Average$496FlexibilityNo cancel feeOn-time63%

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