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Cheap flights from Denver to New York from $121

This is the cheapest one-way flight price found by a momondo user in the last 72 hours by searching for a flight from Denver to New York departing on 9/7. Fares may change, and may not be available for all flights or travel dates. Click the price to refresh the search for this deal.
1 adult
1 adult, Economy, 0 bags

Find the cheapest flights from Denver to New York

Cheap round-trip flights

Enter your travel dates to find the best prices.
Frontier Logo
11:59 pm - 9:53 am
DEN
-
ISP
7h 54m
1 stop
Frontier Logo
7:09 pm - 8:07 am
ISP
-
DEN
14h 58m
1 stop
$273Frontier
Tue, Sep 1 - Mon, Sep 7
Frontier Logo
11:59 pm - 7:01 pm
DEN
-
ISP
17h 02m
1 stop
Frontier Logo
7:09 pm - 11:00 pm
ISP
-
DEN
29h 51m
1 stop
$275Frontier
Thu, Aug 20 - Sun, Aug 23
Frontier Logo
11:59 pm - 9:53 am
DEN
-
ISP
7h 54m
1 stop
Frontier Logo
10:57 am - 11:00 pm
ISP
-
DEN
14h 03m
1 stop
$290Frontier
Tue, Sep 1 - Tue, Sep 8
Multiple Airlines Logo
10:26 am - 9:33 am
DEN
-
ISP
21h 07m
1 stop
Multiple Airlines Logo
12:00 pm - 10:33 pm
ISP
-
DEN
12h 33m
2 stops
$296Multiple Airlines
Tue, Sep 15 - Tue, Sep 29
Frontier Logo
11:59 pm - 9:53 am
DEN
-
ISP
7h 54m
1 stop
Frontier Logo
7:09 pm - 8:07 am
ISP
-
DEN
14h 58m
1 stop
$299Frontier
Tue, Sep 1 - Mon, Sep 7
Frontier Logo
6:00 am - 6:14 pm
DEN
-
ISP
10h 14m
1 stop
Frontier Logo
7:09 pm - 8:07 am
ISP
-
DEN
14h 58m
1 stop
$308Frontier
Thu, Sep 3 - Mon, Sep 7
Frontier Logo
8:55 am - 7:01 pm
DEN
-
ISP
8h 06m
1 stop
Frontier Logo
10:57 am - 11:00 pm
ISP
-
DEN
14h 03m
1 stop
$319Frontier
Wed, Aug 5 - Fri, Aug 7
Frontier Logo
6:00 am - 7:01 pm
DEN
-
ISP
11h 01m
1 stop
Frontier Logo
7:46 pm - 10:29 pm
ISP
-
DEN
28h 43m
1 stop
$323Frontier
Sat, Aug 8 - Fri, Aug 14
Frontier Logo
11:59 pm - 9:53 am
DEN
-
ISP
7h 54m
1 stop
Frontier Logo
7:09 pm - 8:07 am
ISP
-
DEN
14h 58m
1 stop
$329Frontier
Tue, Sep 1 - Mon, Sep 7
Frontier Logo
6:00 am - 7:01 pm
DEN
-
ISP
11h 01m
1 stop
Frontier Logo
7:09 pm - 8:07 am
ISP
-
DEN
14h 58m
1 stop
$338Frontier
Sat, Aug 15 - Fri, Aug 21

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Frontier flights from Denver to Islip, New York

Our best Frontier deals on Denver to Islip, New York flight tickets
Frontier
Sep 1
DEN11:59 pmDenver Intl
7h 54m
1 stop
ISP9:53 amIslip Long Island
Sep 7
ISP7:09 pmIslip Long Island
14h 58m
1 stop
DEN8:07 amDenver Intl
$273
Frontier
Aug 20
DEN11:59 pmDenver Intl
17h 02m
1 stop
ISP7:01 pmIslip Long Island
Aug 23
ISP7:09 pmIslip Long Island
29h 51m
1 stop
DEN11:00 pmDenver Intl
$275
Frontier
Sep 1
DEN11:59 pmDenver Intl
7h 54m
1 stop
ISP9:53 amIslip Long Island
Sep 8
ISP10:57 amIslip Long Island
14h 03m
1 stop
DEN11:00 pmDenver Intl
$290

Southwest flights from Denver to Islip, New York

Our best Southwest deals on Denver to Islip, New York flight tickets
Southwest
Sep 15
DEN9:35 amDenver Intl
9h 30m
2 stops
ISP9:05 pmIslip Long Island
Sep 29
ISP12:55 pmIslip Long Island
8h 45m
2 stops
DEN7:40 pmDenver Intl
$373
Southwest
Aug 27
DEN11:05 amDenver Intl
9h 00m
2 stops
ISP10:05 pmIslip Long Island
Aug 31
ISP6:10 amIslip Long Island
8h 55m
2 stops
DEN1:05 pmDenver Intl
$382
Southwest
Aug 8
DEN11:55 pmDenver Intl
8h 50m
1 stop
ISP10:45 amIslip Long Island
Aug 14
ISP1:15 pmIslip Long Island
9h 45m
2 stops
DEN9:00 pmDenver Intl
$420

momondo Fare Finder

 
Customize your flight search to find flights from Denver to Islip, New York 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, momondo users made 832,500 searches. Data last updated July 14, 2026.
Use the filters below to find and compare flights from Denver to Islip, New York that are best for you.

Fly from

Fly to

Route

Depart

Return

Price

Cheapest round-trip

DenverIslip

DEN - ISP

DENISP

Denver Intl

Tue 9/1

11:59 pm-9:53 am

1 stop7h 54m

Islip Long Island

Mon 9/7

7:09 pm-8:07 am

1 stop14h 58m

$273

DenverIslip

DEN - ISP

DENISP

Denver Intl

Thu 8/20

11:59 pm-7:01 pm

1 stop17h 02m

Islip Long Island

Sun 8/23

7:09 pm-11:00 pm

1 stop29h 51m

$275
Quickest round-trip

DenverIslip

DEN - ISP

DENISP

Denver Intl

Tue 9/1

11:59 pm-9:53 am

1 stop7h 54m

Islip Long Island

Tue 9/8

10:57 am-11:00 pm

1 stop14h 03m

$290

DenverIslip

DEN - ISP

DENISP

Denver Intl

Tue 9/15

10:26 am-9:33 am

1 stop21h 07m

Islip Long Island

Tue 9/29

12:00 pm-10:33 pm

2 stops12h 33m

$296

DenverIslip

DEN - ISP

DENISP

Denver Intl

Tue 9/1

11:59 pm-9:53 am

1 stop7h 54m

Islip Long Island

Mon 9/7

7:09 pm-8:07 am

1 stop14h 58m

$299

DenverIslip

DEN - ISP

DENISP

Denver Intl

Thu 9/3

6:00 am-6:14 pm

1 stop10h 14m

Islip Long Island

Mon 9/7

7:09 pm-8:07 am

1 stop14h 58m

$308

DenverIslip

DEN - ISP

DENISP

Denver Intl

Wed 8/5

8:55 am-7:01 pm

1 stop8h 06m

Islip Long Island

Fri 8/7

10:57 am-11:00 pm

1 stop14h 03m

$319

DenverIslip

DEN - ISP

DENISP

Denver Intl

Sat 8/8

6:00 am-7:01 pm

1 stop11h 01m

Islip Long Island

Fri 8/14

7:46 pm-10:29 pm

1 stop28h 43m

$323

DenverIslip

DEN - ISP

DENISP

Denver Intl

Tue 9/1

11:59 pm-9:53 am

1 stop7h 54m

Islip Long Island

Mon 9/7

7:09 pm-8:07 am

1 stop14h 58m

$329

DenverIslip

DEN - ISP

DENISP

Denver Intl

Sat 8/15

6:00 am-7:01 pm

1 stop11h 01m

Islip Long Island

Fri 8/21

7:09 pm-8:07 am

1 stop14h 58m

$338

Flights are sorted by cheapest round-trip flights first.

Showing 1-10 of 20 resultsSorted by cheapest first
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See travel insights to New York from

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

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

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

Frontier is the most popular carrier operating from Denver Intl to Islip Long Island

What airlines fly to Islip, New York?

United Airlines, Delta and Frontier are the top three most popular airlines that fly to Islip, New York from Denver according to our data. United Airlines is the first choice among our users, with 54% of people opting to fly with this airline when traveling to Islip, New York. Keep in mind that there are 6 different airlines that fly to Islip, New York on a routine basis, so you have a few additional options to choose from.

When to book flights from Denver to Islip, New York

Are you open to changing your travel dates? Check out the ideal times to fly from Denver to Islip, New York according to our flight data. Find out which month and days have the cheapest flights.
Estimated round-trip price

Cheap Denver to Islip, New York (DEN to ISP) flight deals and tips

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

Fastest flight time

7h 34m

Direct flights

None
The fastest flight from Denver to Islip, New York takes 7h 34m
There are no direct flights from Denver to Islip, New York. There are no popular flight routes from Denver to Islip, New York.
Search flight deals

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

  • How far is Denver Intl to Islip Long Island by plane?

    A flight from Denver Intl to Islip Long Island will travel around 1667.0 mi. In terms of flight time, this usually takes a little over 7h 34m.

  • When did momondo last update prices for flights from Denver Intl Airport to Islip Long Island Airport?

    Prices for flights from Denver Intl Airport to Islip Long Island Airport were last updated today.

  • How many operators does momondo search for flights from Denver Intl Airport to Islip Long Island Airport?

  • How old do you have to be to fly from Denver Intl Airport to Islip Long Island Airport?

    The minimum age a child must be to fly alone is five but airlines that offer an unaccompanied minor (UNMR) service will have their own age restrictions, including rules around flight length, timings, and stopovers. We always recommend checking with the individual airline you are booking with to travel from Denver Intl Airport to Islip Long Island Airport.

  • What documentation or ID do you need to fly to Islip Long Island Airport?

    The required travel and health documents for your Islip Long Island Airport trip may vary depending on your itinerary and personal circumstances. As a general rule, you should carry multiple documents, including a national ID card or driver's license and a passport valid for six months after your intended arrival at Islip Long Island Airport. We recommend that you seek guidance from your airline or a reliable third party such as IATA.

  • What is the most popular airline from Denver to Islip, New York?

Best airlines flying from Denver to Islip, New York

Compare and see reviews for airlines that fly from Denver to Islip, New York with momondo
Airline
Rating
Free Cancellation
Price
SouthwestPriceFrom $375Free CancellationRating
8.0
4,246 reviews
Search Southwest flights

Traveling to a place near New York?

Book flights to New York if you plan to visit one of these locations
Montauk
Riverhead
Southampton
Sag Harbor
Amagansett

Why use momondo?

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

Finding the right flight to Islip from Denver 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 Islip quick and easy, saving you time and money.

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

All flight searches from Denver to Islip on momondo can be filtered to show those which offer flexible booking policies.

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

Once all potential Denver to Islip flight options are in front of you, momondo lets you sort and filter flights based on preferences such as airline, price and flight times amongst many other options.

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

Of course. momondo tracks the price of Denver to Islip flights. All you need is a valid email address and we will do the rest; it is that quick and easy.

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