The average bus between Islip and Port Jefferson takes 2h 21m and the fastest bus takes 1h 58m. There is a bus service every few hours from Islip to Port Jefferson. 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 Islip and Port Jefferson. The earliest departure is at 5:56 AM in the morning, and the last departure from Islip is at 10:55 PM which arrives into Port Jefferson at 6:24 AM. All services require a transfer, and take on average 2h 21m. The schedules shown below are for the next available departures.

2h 29m • 1 change

2h 29m • 1 change

2h 29m • 1 change

2h • 1 change

1h 58m • 1 change

1h 58m • 1 change

1h 58m • 1 change

1h 58m • 1 change

1h 58m • 1 change

1h 58m • 1 change

1h 58m • 1 change

1h 58m • 1 change
Want to know about travelling from Islip to Port Jefferson? 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 Islip to Port Jefferson. However, there are services departing from Islip station and arriving at Port Jefferson station via Patchogue LIRR. The journey, including transfers, takes approximately 2h 21m.
Islip to Port Jefferson bus services, operated by Suffolk County Transit, depart from Islip Town Hall station.
Islip to Port Jefferson bus services, operated by Suffolk County Transit, arrive at NYS 25A/E Broadway station.
The distance between Islip and Port Jefferson is 26.9 km. The road distance is 65 km.
You can take a bus from Islip Town Hall to NYS 25A/E Broadway via Patchogue LIRR in around 2h 24m.