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Islip

$118+ 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 4/27. Fares are subject to change and may not be available on all flights or dates of travel.
DEN — ISP
Apr 2 — Apr 91
Wed 4/2
Wed 4/9
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 March 28, 2025.

Most accurate provider

FlightHub
3 stars

Most trusted provider

FlightHub
3 stars

Round-trip from

$268
(Frontier)

One-way from

$118
(Cheapflightsfares)

Popular in

March

Cheapest in

September

Average price

$316
Provider with most accurate pricing for Denver Intl-New York (NYC) flight deals.
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Provider most trusted by Cheapflights users for Denver Intl-New York (NYC) flights.
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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. 5% potential increase in price ($16 potential increase over avg. RT price).
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Cheapest flight prices on average. 1% potential price decrease ($4 potential savings vs. average RT price).
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Average for round-trip flights in March 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 March 28, 2025.

This Frontier deal was found by Cheapflights users on 3/27. 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.
Wed 4/2312:05 amDEN - ISP
1 stop7h 55mFrontier
Tue 4/299:42 pmISP - DEN
1 stop13h 01mFrontier
Deal found 3/27$268
This Southwest deal was found by Cheapflights users on 3/27. 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.
Tue 7/812:05 pmDEN - ISP
1 stop7h 40mSouthwest
Fri 7/182:40 pmISP - DEN
1 stop8h 15mSouthwest
Deal found 3/27$427
This Booking.com deal was found by Cheapflights users on 3/27. 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 Booking.com is selected, and click “Compare selected” under the list of providers to see comparable flight deals.
Mon 7/712:04 amDEN - ISP
1 stop17h 30mMultiple Airlines
Fri 7/1810:34 amISP - DEN
2 stops38h 25mMultiple Airlines
Deal found 3/27$875

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 March 28, 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

Wed 4/23

12:05 am-10:00 am

1 stop7h 55m

Islip Long Island

Tue 4/29

9:42 pm-8:43 am

1 stop13h 01m

$268

DenverIslip

DEN - ISP

DENISP

Denver Intl

Tue 7/8

12:05 pm-9:45 pm

1 stop7h 40m

Islip Long Island

Fri 7/18

2:40 pm-8:55 pm

1 stop8h 15m

$427

DenverIslip

DEN - ISP

DENISP

Denver Intl

Mon 7/7

12:04 am-7:34 pm

1 stop17h 30m

Islip Long Island

Fri 7/18

10:34 am-10:59 pm

2 stops38h 25m

$875

DenverIslip

DEN - ISP

DENISP

Denver Intl

Sun 4/27

12:05 am-10:00 am

1 stop7h 55m

$118

DenverIslip

DEN - ISP

DENISP

Denver Intl

Thu 5/8

7:45 am-8:20 pm

2 stops10h 35m

$206

DenverIslip

DEN - ISP

DENISP

Denver Intl

Thu 5/8

6:30 pm-3:15 pm

3 stops18h 45m

$450

DenverIslip

DEN - ISP

DENISP

Denver Intl

Sun 8/24

9:53 am-9:15 pm

1 stop9h 22m

$504

DenverIslip

DEN - ISP

DENISP

Denver Intl

Sat 7/12

11:59 pm-6:59 pm

2 stops17h 00m

$667

Flights are sorted by cheapest round-trip flights first.

Deals found on 3/27

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, January is the cheapest month in which you can book a flight from Colorado to Islip, New York (average of $108). Flying from Colorado to Islip, New York 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 March 28, 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, New York as you normally would.

Rainfall in Islip by month

Plan your trip to Islip by taking into account the average rainfall totals by month.

In terms of precipitation, rainfall in Islip, New York ranges from 3.3 - 4.4 inches per month. March is typically the wettest month, when rainfall can reach 4.4 in. February is typically the driest time to visit Islip, New York when rainfall is around 3.3 in.

Temperature in Islip by month

Plan your trip to Islip by taking into account the average temperature totals by month.

If weather is an important factor for your trip to Islip, New York, use this chart to help with planning. For those seeking warmer temperatures, July is the ideal time of year to visit, when temperatures reach an average of 73.4 F. Travelers looking to avoid the cold should look outside of January, when temperatures are typically at their lowest (around 30.2 F).

Reviews of airlines servicing Islip

Get insights into the airlines that provide service to Islip. Read reviews, discover amenities, and learn about the overall travel experience offered by airlines. Use this information to make informed decisions when choosing an airline for your flight to Islip. Reviews last updated March 28, 2025.
Southwest
8.1
Very good
4,273 reviews

Entertainment

7.6

Comfort

8.1

Boarding

8.2

Food

7.1

Overall

8.1

Crew

8.6

Reviews

1 / 20
8.0
Excellent

Ila,Mar 2025

HOU - DAL

Our original flight was delayed. We were able to change our flight and got home at close to the same time. Looking forward to when you have assigned seating.
Southwest
8.1
Very good
4,273 reviews
Southwest
8.1
Very good
4,273 reviews

Entertainment

7.6

Comfort

8.1

Boarding

8.2

Food

7.1

Overall

8.1

Crew

8.6

Reviews

1 / 20
8.0
Excellent

Ila,Mar 2025

HOU - DAL

Our original flight was delayed. We were able to change our flight and got home at close to the same time. Looking forward to when you have assigned seating.
Frontier
6.0
Okay
3,271 reviews
Southwest
8.1
Very good
4,273 reviews

Entertainment

7.6

Comfort

8.1

Boarding

8.2

Food

7.1

Overall

8.1

Crew

8.6

Reviews

1 / 20
8.0
Excellent

Ila,Mar 2025

HOU - DAL

Our original flight was delayed. We were able to change our flight and got home at close to the same time. Looking forward to when you have assigned seating.

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.

  • 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, January is the cheapest month in which you can book a flight from Colorado to Islip, New York (average of $108). Flying from Colorado to Islip, New York 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 Colorado?

Book flights to Colorado if you plan to visit one of these locations
Southampton
Riverhead

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Top 2 airlines flying from Colorado to Islip

Discover the top 2 airlines 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 March 28, 2025.
AirlineCheapestAverageFlexibilityOn-time
FrontierCheapest$155Average$241FlexibilityNo cancel feeOn-time62%
SouthwestCheapest$375Average$551FlexibilityNo cancel feeOn-time63%
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