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Route

Portsmouth → Islip

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

Same local time in Portsmouth and Islip.

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
2
busiest month · May
1
quietest month · Oct
1 hr 9 min
measured flight time
12 / 12
months seen

Through the year

Per day, month by month

  1. 1Jan2026
  2. 1Feb
  3. 1Mar
  4. 1Apr
  5. 2May
  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 Portsmouth. Most departures between 13:00 and 16:00.

  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. 0.1Thu
  5. 0.1Fri
  6. 0.1Sat
  7. 0.1Sun

Fleet

Aircraft observed

  1. PA4421%
  2. Pilatus PC-12PC1211%
  3. Dassault Falcon 900F9009%
  4. BE366%
  5. SF506%
All the numbers in a table
MonthPer daySeenAirlines
January 202614
  • Lincoln Airlines1×
February 202613–
    March 202612–
      April 202612–
        May 202625–
          June 202616
          • Lincoln Airlines1×
          July 202614–
            August 202613
            • Lincoln Airlines1×
            September 202615–
              October 202514–
                November 202512–
                  December 202517–

                    Airlines observed on this route

                    From observed callsign routes on PSM-ISP - 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 Portsmouth: 16.
                    • Direct destinations observed from Islip: 29.

                    The airports on this route

                    Portsmouth International Airport at Pease

                    Portsmouth, United StatesPSM / KPSM

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

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

                    Airport pageAll direct destinations

                    Long Island MacArthur Airport

                    Islip, United StatesISP / KISP

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

                    69 °F · ClearSource: forecast by MET Norway (adapted), licensed under CC BY 4.0

                    Airport pageAll direct destinations

                    Alternative airports for this journey

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

                    PSM HPNWestchester County AirportWhite Plains is about 37 mi from Islip.View route →PSM JFKJohn F. Kennedy International AirportNew York is about 37 mi from Islip.View route →BED ISPLaurence G Hanscom FieldBedford is about 48 mi from Portsmouth.View route →PSM TEBTeterboro AirportTeterboro is about 50 mi from Islip.View route →

                    About the route from Portsmouth to Islip

                    The observed direct connection between Portsmouth International Airport at Pease (PSM) and Long Island MacArthur Airport (ISP) 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 Portsmouth from Islip by air?
                    The great-circle distance between Portsmouth International Airport at Pease and Long Island MacArthur Airport is approximately 196 mi.
                    How long is the flight from Portsmouth to Islip?
                    Based on the distance, the estimated flight time is about 55m. This is an estimate, not a schedule.
                    Is there a direct connection from Portsmouth to Islip?
                    Yes, a direct connection between PSM and ISP 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 Portsmouth to Islip?
                    On average around 1 flights a day, measured over twelve months (October 2025 to September 2026) in the flight archive, with 47 observed flights. Mainly Lincoln Airlines. That is an observation, not a timetable.
                    What is the current time difference between Portsmouth and Islip?
                    Same local time in Portsmouth and Islip.

                    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.