To save up to 91% on this flight, we recommend booking at least 53 days prior to travel. The price may fluctuate and will likely increase closer to your departure date. Users on Cheapflights have found tickets from Islip, New York to Portland from $408 1-2 weeks out and tickets from $655 for flights departing within the next 72 hours.
Flights from Islip, New York to Portland lean towards being more expensive in December. Prices are generally better when you fly from Islip, New York to Portland in September, with the cheapest ticket starting at $99.
When flying from Islip, New York to Portland, the time of day you decide to fly out makes little to no difference towards the overall price you’ll pay on tickets.
Fly from
Fly to
Budget
$445 - $1,097
Route
Depart
Return
Price
Islip Long IslandPortland
ISP - PDX
ISPPDX
Islip Long Island
Sun 6/2
3 stops26h 10m
Portland
Sun 6/9
3 stops22h 27m
Islip Long IslandPortland
ISP - PDX
ISPPDX
Islip Long Island
Sun 6/2
3 stops26h 10m
Portland
Sun 6/9
2 stops14h 08m
Islip Long IslandPortland
ISP - PDX
ISPPDX
Islip Long Island
Mon 5/13
3 stops22h 30m
Portland
Thu 5/23
2 stops19h 16m
Islip Long IslandPortland
ISP - PDX
ISPPDX
Islip Long Island
Mon 5/13
3 stops22h 30m
Portland
Thu 5/23
3 stops30h 34m
No data available for this route at this time. Please check back soon.
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