To save up to 115% on this flight, we recommend booking at least 48 days prior to travel. The price may fluctuate and will likely increase closer to your departure date. Users on Cheapflights have found tickets from Portland to Islip, New York from $398 1-2 weeks out and tickets from $613 for flights departing within the next 72 hours.
Flights from Portland to Islip, New York lean towards being more expensive in December. Prices are generally better when you fly from Portland to Islip, New York in February, with the cheapest ticket starting at $99.
Regardless of the time of day you decide to fly, the ticket price will remain around the same. Book flights from Portland to Islip, New York as you normally would.
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