What airlines fly to Colorado?

United Airlines, Delta and JetBlue are the top three most popular airlines that fly to Colorado from Islip, New York according to our data. United Airlines is the first choice among our users, with 64% of people opting to fly with this airline when traveling to Colorado. Keep in mind that there are 6 different airlines that fly to Colorado on a routine basis, so you have a few additional options to choose from.

What is the cheapest airline that flies from Islip Long Island to Colorado?

Frontier and Southwest are the most popular carriers operating from Islip Long Island to Colorado

When did momondo last update prices for flights from Islip Long Island Airport to Colorado?

Prices for flights from Islip Long Island Airport to Colorado are refreshed on a daily basis.

How many operators does momondo search for flights from Islip Long Island Airport to Colorado?

As of May 2026, there is 1 operator available to choose from for flights from Islip Long Island Airport to Colorado.

How old do you have to be to fly from Islip Long Island Airport to Colorado?

The minimum age for a child to fly alone is five, but airlines that offer an unaccompanied minor (UNMR) service may have their own age limitations. Flight duration, scheduling, and layovers are among the considerations that may influence age limits. We recommend that you double-check with the airline you are booking with for travel from Islip Long Island Airport to Colorado.

What documentation or ID do you need to fly to Colorado?

The travel and health documents required for your trip to Colorado can vary based on your itinerary and personal situation. As a rule, consider having multiple documents such as a national ID card or driver’s license, and a passport valid for six-months after you plan to arrive at Colorado. We always recommend checking with your airline or a trusted third party such as IATA to get advice.

$111 Cheap Flights from Islip, New York to Colorado in 2026

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Find the cheapest flights from Islip, New York to Colorado

Round-trip

One-way

Last minute

Cheap round-trip flights

Enter your travel dates to find the best prices.

7:50 pm - 2:44 pm

ISP

DEN

20h 54m

1 stop

11:59 pm - 7:03 pm

DEN

ISP

17h 04m

1 stop

$250Frontier

Fri, Jul 24 - Sun, Jul 26

4:41 pm - 11:04 pm

ISP

DEN

8h 23m

1 stop

6:00 am - 8:57 pm

DEN

ISP

12h 57m

1 stop

$270Frontier

Tue, Jun 9 - Wed, Jun 10

4:41 pm - 11:00 pm

ISP

DEN

8h 19m

1 stop

11:49 pm - 9:58 am

DEN

ISP

8h 09m

1 stop

$276Frontier

Tue, Jul 7 - Thu, Jul 9

11:00 am - 11:11 pm

ISP

DEN

14h 11m

1 stop

6:00 am - 8:57 pm

DEN

ISP

12h 57m

1 stop

$280Frontier

Thu, Jun 4 - Wed, Jun 10

11:00 am - 11:11 pm

ISP

DEN

14h 11m

1 stop

6:00 am - 8:57 pm

DEN

ISP

12h 57m

1 stop

$290Frontier

Sat, Jun 6 - Thu, Jun 11

4:41 pm - 11:04 pm

ISP

DEN

8h 23m

1 stop

6:00 am - 8:57 pm

DEN

ISP

12h 57m

1 stop

$300Frontier

Tue, Jun 9 - Wed, Jun 10

7:50 pm - 10:39 pm

ISP

DEN

28h 49m

1 stop

11:49 pm - 3:56 pm

DEN

ISP

14h 07m

1 stop

$309Frontier

Fri, Jun 12 - Mon, Jun 15

4:41 pm - 11:04 pm

ISP

DEN

8h 23m

1 stop

6:00 am - 8:57 pm

DEN

ISP

12h 57m

1 stop

$310Frontier

Tue, Jun 9 - Wed, Jun 10

9:00 am - 6:05 pm

ISP

COS

11h 05m

2 stops

9:10 am - 10:10 pm

COS

ISP

11h 00m

2 stops

$522Southwest

Wed, May 27 - Tue, Jun 2

6:00 am - 2:00 pm

ISP

COS

10h 00m

2 stops

10:35 am - 10:35 pm

COS

ISP

10h 00m

2 stops

$596Southwest

Thu, Jun 11 - Wed, Jun 17

Frontier flights from Islip, New York to Colorado

Our best Frontier deals on Islip, New York to Colorado flight tickets

Frontier

Jul 24

ISP7:50 pmIslip Long Island

20h 54m

1 stop

DEN2:44 pmDenver Intl

Jul 26

DEN11:59 pmDenver Intl

17h 04m

1 stop

ISP7:03 pmIslip Long Island

$250

Frontier

Jun 9

ISP4:41 pmIslip Long Island

8h 23m

1 stop

DEN11:04 pmDenver Intl

Jun 10

DEN6:00 amDenver Intl

12h 57m

1 stop

ISP8:57 pmIslip Long Island

$270

Frontier

Jul 7

ISP4:41 pmIslip Long Island

8h 19m

1 stop

DEN11:00 pmDenver Intl

Jul 9

DEN11:49 pmDenver Intl

8h 09m

1 stop

ISP9:58 amIslip Long Island

$276

Southwest flights from Islip, New York to Colorado

Our best Southwest deals on Islip, New York to Colorado flight tickets

Southwest

Aug 6

ISP12:35 pmIslip Long Island

7h 25m

1 stop

DEN6:00 pmDenver Intl

Aug 12

DEN8:05 amDenver Intl

6h 50m

1 stop

ISP4:55 pmIslip Long Island

$431

Southwest

Aug 6

ISP1:15 pmIslip Long Island

9h 45m

2 stops

DEN9:00 pmDenver Intl

Aug 12

DEN8:05 amDenver Intl

6h 50m

1 stop

ISP4:55 pmIslip Long Island

$436

Southwest

Aug 6

ISP6:10 amIslip Long Island

9h 05m

2 stops

DEN1:15 pmDenver Intl

Aug 12

DEN11:10 amDenver Intl

7h 55m

2 stops

ISP9:05 pmIslip Long Island

$441

Fly from

Fly to

Route

Depart

Return

Price

Cheapest round-trip

IslipDenver

ISP - DEN

ISPDEN

Islip Long Island

Fri 7/24

7:50 pm-2:44 pm

1 stop20h 54m

Denver Intl

Sun 7/26

11:59 pm-7:03 pm

1 stop17h 04m

$250

IslipDenver

ISP - DEN

ISPDEN

Islip Long Island

Tue 6/9

4:41 pm-11:04 pm

1 stop8h 23m

Denver Intl

Wed 6/10

6:00 am-8:57 pm

1 stop12h 57m

$270

Quickest round-trip

IslipDenver

ISP - DEN

ISPDEN

Islip Long Island

Tue 7/7

4:41 pm-11:00 pm

1 stop8h 19m

Denver Intl

Thu 7/9

11:49 pm-9:58 am

1 stop8h 09m

$276

IslipDenver

ISP - DEN

ISPDEN

Islip Long Island

Thu 6/4

11:00 am-11:11 pm

1 stop14h 11m

Denver Intl

Wed 6/10

6:00 am-8:57 pm

1 stop12h 57m

$280

IslipDenver

ISP - DEN

ISPDEN

Islip Long Island

Sat 6/6

11:00 am-11:11 pm

1 stop14h 11m

Denver Intl

Thu 6/11

6:00 am-8:57 pm

1 stop12h 57m

$290

IslipDenver

ISP - DEN

ISPDEN

Islip Long Island

Tue 6/9

4:41 pm-11:04 pm

1 stop8h 23m

Denver Intl

Wed 6/10

6:00 am-8:57 pm

1 stop12h 57m

$300

IslipDenver

ISP - DEN

ISPDEN

Islip Long Island

Fri 6/12

7:50 pm-10:39 pm

1 stop28h 49m

Denver Intl

Mon 6/15

11:49 pm-3:56 pm

1 stop14h 07m

$309

IslipDenver

ISP - DEN

ISPDEN

Islip Long Island

Tue 6/9

4:41 pm-11:04 pm

1 stop8h 23m

Denver Intl

Wed 6/10

6:00 am-8:57 pm

1 stop12h 57m

$310

IslipColorado Springs

ISP - COS

ISPCOS

Islip Long Island

Wed 5/27

9:00 am-6:05 pm

2 stops11h 05m

Colorado Springs

Tue 6/2

9:10 am-10:10 pm

2 stops11h 00m

$522

IslipColorado Springs

ISP - COS

ISPCOS

Islip Long Island

Thu 6/11

6:00 am-2:00 pm

2 stops10h 00m

Colorado Springs

Wed 6/17

10:35 am-10:35 pm

2 stops10h 00m

$596

Flights are sorted by cheapest round-trip flights first.

Showing 1-10 of 20 resultsSorted by cheapest first

How to get the cheapest flight ticket from Islip, New York to Colorado

Look no further. We've gone through all the searches for this route on momondo so you have the important information and insights to find the cheapest flight ticket for your trip

Prices

Airlines

What is the cheapest month to fly to Colorado?

The month of March is, on average, the cheapest month to fly to Colorado from Islip, New York, with most prices found around $0. The month of January is another great option to travel to Colorado, with average flight prices from Islip, New York averaging around $0.

Cheap Islip, New York to Colorado flight deals and tips

Find info about flight duration, direct flights, and airports for your flight from Islip, New York to Colorado

Fastest flight time	8h 23m
Direct flights	None

The fastest flight from Islip, New York to Colorado takes 8h 23m

There are no direct flights from Islip, New York to Colorado. There are no popular flight routes from Islip, New York to Colorado.

Search flight deals

Frequently asked questions about flying from Islip, New York to Colorado

When did momondo last update prices for flights from Islip Long Island Airport to Colorado?
Prices for flights from Islip Long Island Airport to Colorado are refreshed on a daily basis.
How many operators does momondo search for flights from Islip Long Island Airport to Colorado?
As of May 2026, there is 1 operator available to choose from for flights from Islip Long Island Airport to Colorado.
How old do you have to be to fly from Islip Long Island Airport to Colorado?
The minimum age for a child to fly alone is five, but airlines that offer an unaccompanied minor (UNMR) service may have their own age limitations. Flight duration, scheduling, and layovers are among the considerations that may influence age limits. We recommend that you double-check with the airline you are booking with for travel from Islip Long Island Airport to Colorado.
What documentation or ID do you need to fly to Colorado?
The travel and health documents required for your trip to Colorado can vary based on your itinerary and personal situation. As a rule, consider having multiple documents such as a national ID card or driver’s license, and a passport valid for six-months after you plan to arrive at Colorado. We always recommend checking with your airline or a trusted third party such as IATA to get advice.

Best airlines flying from Islip, New York to Colorado

Compare and see reviews for airlines that fly from Islip, New York to Colorado with momondo

Airline	Rating	Free Cancellation	Price
Southwest	PriceFrom $370	Free Cancellation	Rating 8.0 4,291 reviews		Search Southwest flights

Why use momondo?

Why should I use momondo to find a flight deal from Islip to Colorado?

Finding the right flight to Colorado from Islip is quick and easy when you have a range of options in front of you, from reputable agents and recognisable airlines. Options that can then be filtered down to find the best fit. That is what momondo does. We make finding flights to Colorado quick and easy, saving you time and money.

Can I find flights from Islip to Colorado with flexible booking policies on momondo?

momondo does allow users to show only those flights to Colorado from Islip which offer a flexible booking policy as well as other useful filters and features.

How can momondo help me find flights from Islip to Colorado?

momondo provides multiple filters to help you find the best flight to Colorado from Islip. Filter by price, airline, airports, cabin, aircraft, payment method, number of stops and more.

I’m not ready to book a flight from Islip to Colorado right now. Can momondo alert me if prices change?

Price alerts on flights to Colorado from Islip are quick and easy to set up on momondo. Simply perform a search and select the price alert feature. It is as simple as that.