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Find cheap flights from Islip to Colorado from $165

This is the cheapest one-way flight price found by a KAYAK user in the last 72 hours by searching for a flight from Islip to Colorado departing on 6/30. Fares are subject to change and may not be available on all flights or dates of travel. Click the price to replicate the search for this deal.
1 adult
0 bags
일 5/19
일 5/26

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Best Colorado Flight Deals

Cheapest round-trip prices found by our users on KAYAK in the last 72 hours

Denver
Denver1 stop$210

Good to know

High season

June

Cheapest flight

$165
Most popular time to fly and prices are also 41% lower on average.
Flight from Islip to Denver

FAQs - booking Colorado flights

  • How does KAYAK find such low prices on flights from Islip to Colorado?

    KAYAK is a travel search engine. That means we look across the web to find the best prices we can find for our users. With over 2 billion flight queries processed yearly, we are able to display a variety of prices and options on flights from Islip to Colorado.

  • How does KAYAK's flight Price Forecast tool help me choose the right time to buy my flight ticket from Islip to Colorado?

    KAYAK’s flight Price Forecast tool uses historical data to determine whether the price for a flight to Colorado from Islip is likely to change within 7 days, so travelers know whether to wait or book now.

  • What is the Hacker Fare option on flights from Islip to Colorado?

    Hacker Fares allow you to combine one-way tickets in order to save you money over a traditional round-trip ticket. You could then fly to Colorado with an airline and back to Islip with another airline.

  • What is KAYAK's "flexible dates" feature and why should I care when looking for a flight from Islip to Colorado?

    Sometimes travel dates aren't set in stone. If your preferred travel dates have some wiggle room, flexible dates will show you all the options when flying to Colorado from Islip up to 3 days before/after your preferred dates. You can then pick the flights that suit you best.

See more FAQs

Top tips for finding cheap flights to Colorado

  • Morning departure is around 19% more expensive than an evening flight, on average*.
*Average of the lowest prices shown in KAYAK’s search results for departures within the next 30 days

Top airline flying from Islip to Colorado

 
Need help choosing which airline to fly with from Islip to Colorado? KAYAK airline reviews give an overall score for each airline based on loads of factors, including comfort, boarding, in-flight entertainment and more, to make your decision easier. See airline scores according to verified KAYAK customer reviews.
6.3
FrontierOverall score based on 4163 reviews
5.8comfort
5.0entertainment
5.2food
6.6boarding
7.1crew
Airline reviews

Not have to pay for every single item to take a flight. Seating and delays sucked.

2.0 MediocreRussell, Apr 2024PHX - DEN
Read more about Frontier reviews

Not have to pay for every single item to take a flight. Seating and delays sucked.

Terrible. Seats are bad and the baggage policy is inconsistent

Everything was good, and most importantly on time. They have been extremely tardy in some of my flights

They lost my baggage on my connection flight, it’s been 24 hours since I put my claim in and still no update on my bags.

It’s a cheap airline. I wish they had better seats.

The only issues had were outside of Frontier’s control or weren’t expected. It was a two hour flight they completed fast. We landed almost an hour ahead of schedule. The issues with no entertainment or food weren’t issues since there was no expectations. The issue of the loud or crying babies was outside of frontiers control.

Seats are cramped and very uncomfortable. You have to pay for everything and it is too expensive.

Smooth process and flight. My favorite kind. Uneventful and on-time!

Xmas Day- Flights were on time for departure and arrival, baggage check in and boarding process were hassle free, baggage also arrived without any delay. Satisfied customer on this journey.

It’s Frontier so they’d charge you for the air you breath if they can work out how but it was on time.

Book cheap flights from Islip to Colorado

Recent round-trip flight deals

5/30
1 stopFrontier
8h 23mISP-DEN
6/2
1 stopFrontier
12h 05mDEN-ISP
$210
6/13
1 stopFrontier
8h 33mISP-DEN
6/16
1 stopFrontier
8h 33mDEN-ISP
$235
6/7
1 stopFrontier
24h 04mISP-DEN
6/14
1 stopFrontier
14h 59mDEN-ISP
$249
5/6
1 stopFrontier
12h 29mISP-DEN
5/10
1 stopFrontier
12h 51mDEN-ISP
$268
6/1
1 stopFrontier
8h 23mISP-DEN
6/5
1 stopFrontier
11h 12mDEN-ISP
$270
7/9
1 stopFrontier
8h 29mISP-DEN
7/11
1 stopFrontier
9h 34mDEN-ISP
$278
5/9
1 stopFrontier
12h 29mISP-DEN
5/11
1 stopFrontier
10h 37mDEN-ISP
$288
5/30
1 stopFrontier
8h 23mISP-DEN
6/1
1 stopFrontier
11h 58mDEN-ISP
$291
6/13
1 stopFrontier
8h 33mISP-DEN
6/15
1 stopFrontier
11h 12mDEN-ISP
$294
5/26
1 stopFrontier
13h 34mISP-DEN
5/30
1 stopFrontier
11h 57mDEN-ISP
$305

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Recent one-way flight deals

6/30
1 stopFrontier
13h 43mISP-DEN
$165

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Islip - Colorado Flights

Departure:

Islip (ISP)United States

Return flight deals:

Colorado - Islip

Cabin classes: