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Flights from Portland to Islip

Find the cheapest flight options from Portland to Islip over the next three months. Book one-way tickets from MXN$2,806 and round-trip tickets from MXN$8,082.

      • PWM 16:35
        18h 50m
        1 stop
        ISP 11:25
        Portland - Islip | Wed, Dec 17 | Jetblue Airways
        ISP 14:04
        25h 21m
        1 stop
        PWM 15:25
        Islip - Portland | Sun, Dec 21 | Frontier Airlines
        MXN$8,082 MXN$8,980
        10% OFF
        10% OFF
        MXN$8,980 MXN$8,082
      • PWM 13:00
        17h 25m
        1 stop
        ISP Invalid Date
        Portland - Islip | Sat, Dec 13 | Normal Airline
        ISP 15:00
        6h
        Direct
        PWM 16:00
        Islip - Portland | Mon, Dec 15 | Normal Airline
        Find More Flights
        Find More Flights
      • PWM 16:29
        26h 45m
        1 stop
        ISP 19:14
        Portland - Islip | Mon, Dec 15 | Jetblue Airways
        MXN$2,806 MXN$3,346
        16% OFF
        16% OFF
        MXN$3,346 MXN$2,806
      • PWM 15:45
        22h 54m
        1 stop
        ISP 14:39
        Portland - Islip | Wed, Jan 7 | Jetblue Airways
        MXN$3,011 MXN$3,346
        10% OFF
        10% OFF
        MXN$3,346 MXN$3,011
      • PWM 13:00
        17h 25m
        1 stop
        ISP Invalid Date
        Portland - Islip | Sat, Dec 13 | Normal Airline
        Find More Flights
        Find More Flights

Displayed flight fares from Portland to Islip are based on average prices across airlines for the next 3 months, according to the latest Trip.com database.

Flight details for Portland to Islip

The distance between Portland and Islip is 391.5 km. Based on Trip.com's data, travel demand peaks in September. The off-season for travel is August.

Cheapest one-way flight priceMXN$2,806
Cheapest round-trip ticket priceMXN$8,082
Off-season for travelAugust
Peak season for travelSeptember
Flight distance391.5 km

Find the best time to fly from Portland to Islip

The cheapest time for Portland to Islip flights: Jan 4 to Jan 11 — one way flight prices from MXN$2,314.

Cheapest flights
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  • 714
  • 1421
  • 2128

  • Jan

    284
  • 411
  • 1118
  • 1825

  • Feb

    251
  • 18
  • 815
  • 1522

  • Mar

    221
Displayed fare trends are based on Trip.com's aggregated average of the lowest flight prices from Portland to Islip, calculated over the upcoming 10 weeks.

Flight FAQs

  • What are the cheapest flights from Portland to Islip (PWM-ISP)?

    Based on Trip.com data, Jetblue Airways offers one-way fares as low as MXN$2,806 on Cheapest nonstop routes (e.g. PWM to ISP on Mon, Dec 15), while Jetblue Airways offers Cheapest nonstop round-trips from MXN$8,082 departing on Wed, Dec 17 and returning on Sun, Dec 21.
  • By analyzing data from all airlines on the Trip.com flight calendar, it looks like the best time to book a flight from Portland to Islip is around 40 days (6 weeks) in advance, and the best time to fly is usually on Tuesday, Wednesday, and Saturday. Tuesday typically offers the cheapest flights for departure, while Saturday offers the best return deals.
  • To find best deals on flights from Portland to Islip, you can use various tools on Trip.com:
    · Be flexible with your travel dates to get the cheapest flight deal. Now the cheapest flight deal is on Mon, Dec 15, with one-way flights priced at just MXN$2,806.
    · Compare airlines strategically. Budget carriers often provide the lowest base fares, while we found the most affordable airline currently operating on this route is Jetblue Airways.
    · Set up price alerts to easily monitor ticket prices without having to check every day.
    · Check Trip.com flight deals and promo codes frequently.
    · Avoid peak season unless you book very early. It seems the peak season for Islip travel is around September.
    · Get exclusive promo codes for Trip.com app users.
  • The cheapest months to fly from Portland to Islip is August, when demand for travel is lower.
  • After crunching the numbers on our December flight calendar, it's currently cheapest to fly from Portland to Islip on December 17, 2025 with Jetblue Airways, with prices starting at MXN8,082.
  • The time difference between Islip and Portland is 0h.
  • Tickets can only be changed or canceled if permitted by airline policy. To submit a change or cancellation request, go to the flight bookings page, select the option to change or cancel your booking, choose the relevant passengers and segment, and submit a request. Please note that additional charges may apply according to the airline ticket policy. However, if the flight has been rescheduled and you would like to change or cancel your ticket, you can submit an involuntary cancellation request. For more details about change and cancellation policies, please check the customer support pages.