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Route

Islip → Dulles

ISPIslipLong Island MacArthur Airport
IADDullesWashington Dulles International Airport
Distance
264 mi
Estimated flight time
~1h

Same local time in Islip and Dulles.

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
1.5
busiest month · Mar
1
quietest month · Oct
1 hr 2 min
measured flight time
11 / 12
months seen

Through the year

Per day, month by month

  1. 1Jan2026
  2. 1Feb
  3. 1.5Mar
  4. 1Apr
  5. 1May
  6. –Jun
  7. 1Jul
  8. 1.5Aug
  9. 1Sep
  10. 1Oct2025
  11. 1Nov
  12. 1Dec

Airlines

Who flies it

Lincoln Airlinesspring
GTA Airnow 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. 0.3Tue
  3. 0.2Wed
  4. 0.4Thu
  5. 0.4Fri
  6. 0.2Sat
  7. 0.2Sun

Fleet

Aircraft observed

  1. Embraer Phenom 300E55P13%
  2. Gulfstream VGLF512%
  3. Bombardier Challenger 600CL607%
  4. Dassault Falcon 50FA505%
  5. Embraer Legacy 600E35L4%
All the numbers in a table
MonthPer daySeenAirlines
January 202617
  • Lincoln Airlines2×
February 2026114
  • GTA Air2×
March 20261.53
  • Lincoln Airlines1×
April 202616–
    May 202619
    • GTA Air1×
    • Lincoln Airlines1×
    June 2026Not seen in this month.
    July 202615–
      August 20261.59
      • Lincoln Airlines1×
      September 2026115–
        October 202516
        • Lincoln Airlines1×
        November 202514–
          December 202516–

            Airlines observed on this route

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

            GTA Air

            GTX

            Hub: LUK Cincinnati

            15 departure airportsView airline →

            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 Dulles: 171.

            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

            Washington Dulles International Airport

            Dulles, United StatesIAD / KIAD

            International hub · 171 direct destinations · 4 runways · longest runway 11,499 ft

            81 °F · ClearSource: 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.

            HVN IADTweed New Haven AirportNew Haven is about 34 mi from Islip.View route →HPN IADWestchester County AirportWhite Plains is about 37 mi from Islip.View route →JFK IADJohn F. Kennedy International AirportNew York is about 37 mi from Islip.View route →LGA IADLaGuardia AirportNew York is about 40 mi from Islip.View route →

            About the route from Islip to Dulles

            The observed direct connection between Long Island MacArthur Airport (ISP) and Washington Dulles International Airport (IAD) covers approximately 264 mi. The estimated flight time is around 1h. GTA Air and Lincoln Airlines have been observed on this connection in the available route data.

            Frequently asked questions about this route

            How far is Islip from Dulles by air?
            The great-circle distance between Long Island MacArthur Airport and Washington Dulles International Airport is approximately 264 mi.
            How long is the flight from Islip to Dulles?
            Based on the distance, the estimated flight time is about 1h. This is an estimate, not a schedule.
            Is there a direct connection from Islip to Dulles?
            Yes, a direct connection between ISP and IAD has been observed in our route data.
            Which airlines have been observed on this route?
            In the available route data: GTA Air and Lincoln Airlines.
            How often is there a flight from Islip to Dulles?
            On average around 1 flights a day, measured over twelve months (October 2025 to September 2026) in the flight archive, with 84 observed flights. Mainly Lincoln Airlines, GTA Air. That is an observation, not a timetable.
            What is the current time difference between Islip and Dulles?
            Same local time in Islip and Dulles.

            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.