The average train between Ronkonkoma and Groton takes 4h 16m and the fastest train takes 3h 58m. The train service runs several times per day from Ronkonkoma to Groton. The journey time may be longer on weekends and holidays; use the search form on this page to search for a specific travel date.
Trains run every 3 hours between Ronkonkoma and Groton. The earliest departure is at 4:09 AM at night, and the last departure from Ronkonkoma is at 7:31 PM which arrives into Groton at 11:44 PM. All services require a transfer at Penn Station and take an average of 4h 16m. The schedules shown below are for the next available departures.

4h • 1 change

4h 17m • 1 change

4h 41m • 1 change

4h 18m • 1 change

4h • 1 change

4h 17m • 1 change

4h 41m • 1 change

4h 18m • 1 change

4h • 1 change

4h 17m • 1 change

4h 41m • 1 change

4h 18m • 1 change

4h • 1 change

4h 17m • 1 change

4h 41m • 1 change

4h 18m • 1 change

4h • 1 change

4h 17m • 1 change

4h 41m • 1 change

4h 18m • 1 change

4h 5m • 1 change

3h 58m • 1 change

4h 17m • 1 change

4h 2m • 1 change
Want to know about travelling from Ronkonkoma to Groton? 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 train from Ronkonkoma to Groton. However, there are services departing from Ronkonkoma station and arriving at Groton station via New York Penn Station station. The journey, including transfers, takes approximately 4h 16m.
Ronkonkoma to Groton train services, operated by Long Island Rail Road, depart from Ronkonkoma station.
Ronkonkoma to Groton train services, operated by Long Island Rail Road, arrive at New London station.
The distance between Ronkonkoma and Groton is 105.2 km. The road distance is 284 km.
You can take a train from Ronkonkoma to New London via Penn Station and Ny Moynihan Train Hall At Penn Station in around 4h 51m.