Cheap flights from Portland to Islip

One-way fares from $453 · PWM → ISP · prices found by travellers in the last 48 hours

Compare all dates Islip → Portland
Cheapest fare
$453

Breeze Airways · Sat, Nov 14

Cheapest month
November

from $453

Direct flights
Not recently

Usually 1+ stop

Quickest trip
3h 48m

390 km

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Cheapest month to fly from Portland to Islip

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

  1. November 2026 Cheapest $453

Cheapest dates in November 2026

The lowest fares we've seen for each day, cheapest first.

Breeze Airways
Depart17:09 Sat, Nov 14PWM → ISP 3h 48m · 1 stop
$453one way, per person
View deal
See every date in November 2026 →

Plan the rest of your trip to Islip

Where to stay, what to do and getting around, from our travel partners.

Where to stay

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Things to do

Things to do in IslipTours, attractions and day trips on Klook Explore →

Getting around

Airport transfer in IslipPre-book a driver to meet you at arrivals, with Kiwitaxi Book a transfer → Car hire in IslipCompare rental cars from major brands on EconomyBookings Compare cars →

About flights from Portland to Islip

Portland (PWM) and Islip (ISP) are about 390 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 3h 48m. Over the next few months, one-way fares start from $453, and November 2026 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 Portland to Islip?

The cheapest one-way fare we've seen recently is $453 with Breeze Airways, departing Saturday, November 14, 2026.

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

November 2026 currently has the lowest fares, from $453 one way.

Are there direct flights from Portland to Islip?

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

How long is the flight from Portland to Islip?

The quickest journey we've seen takes about 3h 48m. Portland and Islip are around 390 km apart.

Which airlines fly from Portland to Islip?

Recent fares on this route were with Breeze Airways.

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