The average bus between Port Jefferson and Islip takes 2h 22m and the fastest bus takes 2h 3m. There is an hourly bus service from Port Jefferson to Islip. The journey time may be longer on weekends and holidays; use the search form on this page to search for a specific travel date.
Buses run hourly between Port Jefferson and Islip. The earliest departure is at 5:03 AM in the morning, and the last departure from Port Jefferson is at 10:02 PM which arrives into Islip at 6:11 AM. All services require a transfer, and take on average 2h 22m. The schedules shown below are for the next available departures.

2h 5m • 1 change

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2h 12m • 1 change

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2h 10m • 1 change

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Want to know about travelling from Port Jefferson to Islip? We have put together a list of the most frequently asked questions from our users such as: What is the cheapest mode of transport? What is the quickest option? How much do tickets usually cost? and many more.
No, there is no direct bus from Port Jefferson to Islip. However, there are services departing from Port Jefferson station and arriving at Islip station via Patchogue LIRR. The journey, including transfers, takes approximately 2h 22m.
Port Jefferson to Islip bus services, operated by Suffolk County Transit, depart from NYS 25A/E Broadway station.
Port Jefferson to Islip bus services, operated by Suffolk County Transit, arrive at Islip Town Hall station.
The distance between Port Jefferson and Islip is 26.9 km. The road distance is 57 km.
You can take a bus from NYS 25A/E Broadway to Islip Town Hall via Patchogue LIRR in around 2h 24m.