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Route

Islip → Portsmouth

ISPIslipLong Island MacArthur Airport
PSMPortsmouthPortsmouth International Airport at Pease
Distance
196 mi
Estimated flight time
~55m

Same local time in Islip and Portsmouth.

Observed nonstop

View the reverse route

How often does this route fly?

Frequency

Daily at most

On average around 1 flights a day, observed from October 2025 to September 2026.

1
flights per day
1
busiest month · Oct
1 hr 11 min
measured flight time
11 / 12
months seen

Through the year

Per day, month by month

  1. 1Jan2026
  2. 1Feb
  3. 1Mar
  4. –Apr
  5. 1May
  6. 1Jun
  7. 1Jul
  8. 1Aug
  9. 1Sep
  10. 1Oct2025
  11. 1Nov
  12. 1Dec

Airlines

Who flies it

Lincoln Airlinesnow and then

Through the day

Departure times

Local time in Islip. Most departures between 09:00 and 12:00.

  1. 00:00
  2. 01:00
  3. 02:00
  4. 03:00
  5. 04:00
  6. 05:00
  7. 06:00
  8. 07:00
  9. 08:00
  10. 09:00
  11. 10:00
  12. 11:00
  13. 12:00
  14. 13:00
  15. 14:00
  16. 15:00
  17. 16:00
  18. 17:00
  19. 18:00
  20. 19:00
  21. 20:00
  22. 21:00
  23. 22:00
  24. 23:00

Through the week

By weekday

  1. 0.1Mon
  2. 0.2Tue
  3. 0.1Wed
  4. 0.2Thu
  5. 0.1Fri
  6. 0.1Sat
  7. 0.1Sun

Fleet

Aircraft observed

  1. PA4417%
  2. H609%
  3. Pilatus PC-12PC129%
  4. SF509%
  5. BE364%
All the numbers in a table
MonthPer daySeenAirlines
January 202613
  • Lincoln Airlines2×
February 202613–
    March 202612
    • Lincoln Airlines1×
    April 2026Not seen in this month.
    May 202616–
      June 202617
      • Lincoln Airlines1×
      July 202619–
        August 202612–
          September 202614–
            October 202514–
              November 202512–
                December 202514–

                  Airlines observed on this route

                  From observed callsign routes on ISP-PSM - not a booking guarantee.

                  Lincoln Airlines

                  LRT

                  Hub: ISP Islip

                  10 departure airportsView airline →

                  About this route

                  • Domestic route: both airports are in the same country.
                  • The opposite direction has also been observed as a direct connection.
                  • Direct destinations observed from Islip: 29.
                  • Direct destinations observed from Portsmouth: 16.

                  The airports on this route

                  Long Island MacArthur Airport

                  Islip, United StatesISP / KISP

                  Regional airport · 29 direct destinations · 3 runways · longest runway 7,005 ft

                  66 °F · CloudySource: METAR observation via the NOAA Aviation Weather Center

                  Airport pageAll direct destinations

                  Portsmouth International Airport at Pease

                  Portsmouth, United StatesPSM / KPSM

                  Regional airport · 16 direct destinations · 1 runway · longest runway 11,322 ft

                  67 °F · Partly cloudySource: METAR observation via the NOAA Aviation Weather Center

                  Airport pageAll direct destinations

                  Alternative airports for this journey

                  Same journey, a different airport nearby - with an observed direct connection.

                  HPN PSMWestchester County AirportWhite Plains is about 37 mi from Islip.View route →ISP BEDLaurence G Hanscom FieldBedford is about 48 mi from Portsmouth.View route →ISP BOSBoston Logan International AirportBoston is about 50 mi from Portsmouth.View route →TEB PSMTeterboro AirportTeterboro is about 50 mi from Islip.View route →

                  About the route from Islip to Portsmouth

                  The observed direct connection between Long Island MacArthur Airport (ISP) and Portsmouth International Airport at Pease (PSM) covers approximately 196 mi. The estimated flight time is around 55m. Lincoln Airlines has been observed on this connection in the available route data.

                  Frequently asked questions about this route

                  How far is Islip from Portsmouth by air?
                  The great-circle distance between Long Island MacArthur Airport and Portsmouth International Airport at Pease is approximately 196 mi.
                  How long is the flight from Islip to Portsmouth?
                  Based on the distance, the estimated flight time is about 55m. This is an estimate, not a schedule.
                  Is there a direct connection from Islip to Portsmouth?
                  Yes, a direct connection between ISP and PSM has been observed in our route data.
                  Which airlines have been observed on this route?
                  In the available route data: Lincoln Airlines.
                  How often is there a flight from Islip to Portsmouth?
                  On average around 1 flights a day, measured over twelve months (October 2025 to September 2026) in the flight archive, with 46 observed flights. Mainly Lincoln Airlines. That is an observation, not a timetable.
                  What is the current time difference between Islip and Portsmouth?
                  Same local time in Islip and Portsmouth.

                  Where this data comes from

                  The route data comes from the flight archive (ADS-B, adsb.lol): which connections actually flew over the last twelve full months and who flew them, combined with our own airport, runway, and airline datasets. It is reference data about observed routes - not a current timetable and no claim about bookability.

                  The frequency and aircraft on this page come from the flight archive (ADS-B, 12 months, October 2025 to September 2026), summarized per route per month. We do not see every flight, so it is a floor, not a count.

                  Route data updated on October 11, 2026.