Cheap flights from Islip to Denver

One-way fares from $158 · ISP → DEN · prices found by travellers in the last 48 hours

Compare all dates Denver → Islip
Cheapest fare
$158

Frontier Airlines · Thu, Jan 7

Cheapest month
January

from $158

Direct flights
Not recently

Usually 1+ stop

Quickest trip
7h 25m

2,690 km

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Cheapest month to fly from Islip to Denver

Lowest one-way fare per person in each month. Choose a month to see every date.

  1. January 2027 Cheapest $158

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About flights from Islip to Denver

Islip (ISP) and Denver (DEN) are about 2,690 km apart. We haven't seen direct fares on this route recently, so expect at least one stop; the quickest journey we've seen takes about 7h 25m. Over the next few months, one-way fares start from $158, and January 2027 is currently the cheapest month to fly.

These prices come from searches travellers made in the last 48 hours, so they move quickly. If you see a good fare, it's worth booking soon. FlightsExp is free to use: you book directly with our travel partner.

Frequently asked questions

How much is a flight from Islip to Denver?

The cheapest one-way fare we've seen recently is $158 with Frontier Airlines, departing Thursday, January 7, 2027.

What is the cheapest month to fly from Islip to Denver?

January 2027 currently has the lowest fares, from $158 one way.

Are there direct flights from Islip to Denver?

We haven't seen direct fares recently, so most journeys include at least one stop.

How long is the flight from Islip to Denver?

The quickest journey we've seen takes about 7h 25m. Islip and Denver are around 2,690 km apart.

Which airlines fly from Islip to Denver?

Recent fares on this route were with Frontier Airlines.

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