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Cheap flights from Denver to New York from $124

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 10/5. 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
6:57 pm - 3:03 pmDEN  Denver Intl-ISP Islip Long Island
18h 06m2 stops Atlanta Hartsfield-Jackson Orlando
Frontier Logo
6:55 pm - 8:07 amISP  Islip Long Island-DEN Denver Intl
15h 12m1 stop Orlando
$245Frontier
Fri, Oct 16 - Mon, Oct 19
Multiple Airlines Logo
6:30 am - 11:20 amDEN  Denver Intl-ISP Islip Long Island
26h 50m2 stops Atlanta Hartsfield-Jackson Raleigh-Durham
Multiple Airlines Logo
4:13 pm - 8:07 amISP  Islip Long Island-DEN Denver Intl
17h 54m1 stop Orlando
$254Multiple Airlines
Fri, Oct 16 - Mon, Oct 19
Frontier Logo
6:40 am - 4:58 pmDEN  Denver Intl-ISP Islip Long Island
8h 18m1 stop Orlando
Frontier Logo
5:43 pm - 8:04 amISP  Islip Long Island-DEN Denver Intl
40h 21m2 stops Orlando Atlanta Hartsfield-Jackson
$259Frontier
Fri, Sep 11 - Sun, Sep 20
Frontier Logo
7:02 pm - 3:03 pmDEN  Denver Intl-ISP Islip Long Island
18h 01m1 stop Orlando
Frontier Logo
6:55 pm - 8:07 amISP  Islip Long Island-DEN Denver Intl
15h 12m1 stop Orlando
$260Frontier
Fri, Oct 16 - Mon, Oct 19
Frontier Logo
11:21 am - 6:03 pmDEN  Denver Intl-ISP Islip Long Island
28h 42m1 stop Tampa
Frontier Logo
5:43 pm - 7:37 amISP  Islip Long Island-DEN Denver Intl
15h 54m1 stop Orlando
$268Frontier
Sat, Sep 12 - Sat, Sep 19
Frontier Logo
6:40 am - 4:58 pmDEN  Denver Intl-ISP Islip Long Island
8h 18m1 stop Orlando
Frontier Logo
5:43 pm - 7:37 amISP  Islip Long Island-DEN Denver Intl
15h 54m1 stop Orlando
$297Frontier
Fri, Sep 11 - Sun, Sep 20
Southwest Logo
5:30 am - 4:10 pmDEN  Denver Intl-ISP Islip Long Island
8h 40m1 stop Baltimore/Washington
Southwest Logo
6:00 am - 10:15 amISP  Islip Long Island-DEN Denver Intl
6h 15m1 stop Baltimore/Washington
$312Southwest
Sat, Oct 3 - Sat, Oct 31
Southwest Logo
11:00 am - 9:45 pmDEN  Denver Intl-ISP Islip Long Island
8h 45m2 stops Dallas Love Field Baltimore/Washington
Southwest Logo
6:00 am - 10:15 amISP  Islip Long Island-DEN Denver Intl
6h 15m1 stop Baltimore/Washington
$312Southwest
Sat, Oct 3 - Sat, Oct 31
Frontier Logo
10:30 am - 4:58 pmDEN  Denver Intl-ISP Islip Long Island
28h 28m1 stop Orlando
Frontier Logo
5:43 pm - 7:52 amISP  Islip Long Island-DEN Denver Intl
16h 09m1 stop Orlando
$313Frontier
Thu, Sep 10 - Tue, Sep 15
Southwest Logo
11:00 am - 9:45 pmDEN  Denver Intl-ISP Islip Long Island
8h 45m2 stops Dallas Love Field Baltimore/Washington
Southwest Logo
6:00 am - 11:25 amISP  Islip Long Island-DEN Denver Intl
7h 25m2 stops Baltimore/Washington Lambert-St Louis
$317Southwest
Sat, Oct 3 - Sat, Oct 31

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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
Oct 16
DEN6:57 pmDenver Intl
18h 06m
2 stops
ISP3:03 pmIslip Long Island
Oct 19
ISP6:55 pmIslip Long Island
15h 12m
1 stop
DEN8:07 amDenver Intl
$245
Frontier
Sep 11
DEN6:40 amDenver Intl
8h 18m
1 stop
ISP4:58 pmIslip Long Island
Sep 20
ISP5:43 pmIslip Long Island
40h 21m
2 stops
DEN8:04 amDenver Intl
$259
Frontier
Oct 16
DEN7:02 pmDenver Intl
18h 01m
1 stop
ISP3:03 pmIslip Long Island
Oct 19
ISP6:55 pmIslip Long Island
15h 12m
1 stop
DEN8:07 amDenver Intl
$260

Southwest flights from Denver to Islip, New York

Our best Southwest deals on Denver to Islip, New York flight tickets
Southwest
Oct 3
DEN11:00 amDenver Intl
8h 45m
2 stops
ISP9:45 pmIslip Long Island
Oct 31
ISP6:00 amIslip Long Island
6h 15m
1 stop
DEN10:15 amDenver Intl
$312
Southwest
Oct 3
DEN11:00 amDenver Intl
8h 45m
2 stops
ISP9:45 pmIslip Long Island
Oct 31
ISP6:00 amIslip Long Island
7h 25m
2 stops
DEN11:25 amDenver Intl
$317
Southwest
Sep 12
DEN11:15 amDenver Intl
7h 35m
2 stops
ISP8:50 pmIslip Long Island
Sep 19
ISP5:30 amIslip Long Island
10h 20m
2 stops
DEN1:50 pmDenver Intl
$363

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 August 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 Denver Intl - ISP Islip Long Island

DENISP

Denver Intl

Fri 10/16

6:57 pm-3:03 pm

2 stops18h 06m

Islip Long Island

Mon 10/19

6:55 pm-8:07 am

1 stop15h 12m

$245

DenverIslip

DEN Denver Intl - ISP Islip Long Island

DENISP

Denver Intl

Fri 10/16

6:30 am-11:20 am

2 stops26h 50m

Islip Long Island

Mon 10/19

4:13 pm-8:07 am

1 stop17h 54m

$254

DenverIslip

DEN Denver Intl - ISP Islip Long Island

DENISP

Denver Intl

Fri 9/11

6:40 am-4:58 pm

1 stop8h 18m

Islip Long Island

Sun 9/20

5:43 pm-8:04 am

2 stops40h 21m

$259

DenverIslip

DEN Denver Intl - ISP Islip Long Island

DENISP

Denver Intl

Fri 10/16

7:02 pm-3:03 pm

1 stop18h 01m

Islip Long Island

Mon 10/19

6:55 pm-8:07 am

1 stop15h 12m

$260

DenverIslip

DEN Denver Intl - ISP Islip Long Island

DENISP

Denver Intl

Sat 9/12

11:21 am-6:03 pm

1 stop28h 42m

Islip Long Island

Sat 9/19

5:43 pm-7:37 am

1 stop15h 54m

$268

DenverIslip

DEN Denver Intl - ISP Islip Long Island

DENISP

Denver Intl

Fri 9/11

6:40 am-4:58 pm

1 stop8h 18m

Islip Long Island

Sun 9/20

5:43 pm-7:37 am

1 stop15h 54m

$297
Quickest round-trip

DenverIslip

DEN Denver Intl - ISP Islip Long Island

DENISP

Denver Intl

Sat 10/3

5:30 am-4:10 pm

1 stop8h 40m

Islip Long Island

Sat 10/31

6:00 am-10:15 am

1 stop6h 15m

$312

DenverIslip

DEN Denver Intl - ISP Islip Long Island

DENISP

Denver Intl

Sat 10/3

11:00 am-9:45 pm

2 stops8h 45m

Islip Long Island

Sat 10/31

6:00 am-10:15 am

1 stop6h 15m

$312

DenverIslip

DEN Denver Intl - ISP Islip Long Island

DENISP

Denver Intl

Thu 9/10

10:30 am-4:58 pm

1 stop28h 28m

Islip Long Island

Tue 9/15

5:43 pm-7:52 am

1 stop16h 09m

$313

DenverIslip

DEN Denver Intl - ISP Islip Long Island

DENISP

Denver Intl

Sat 10/3

11:00 am-9:45 pm

2 stops8h 45m

Islip Long Island

Sat 10/31

6:00 am-11:25 am

2 stops7h 25m

$317

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 Southwest 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 56% 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 54m

Direct flights

None
The fastest flight from Denver to Islip, New York takes 7h 54m
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 54m.

  • 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 $379Free CancellationRating
8.0
4,218 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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