The average train between Princeton Junction and Union takes 2h 1m and the fastest train takes 1h 15m. There is a train service every few hours from Princeton Junction to Union. 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 hourly between Princeton Junction and Union. The earliest departure is at 4:58 AM at night, and the last departure from Princeton Junction is at 11:36 PM which arrives into Union at 1:35 AM. All services require a transfer, and take on average 2h 1m. The schedules shown below are for the next available departures.

1h 44m • 1 change

1h 50m • 1 change

2h • 1 change

2h 19m • 1 change

1h 36m • 1 change

1h 33m • 1 change

1h 26m • 1 change

1h 44m • 1 change

1h 36m • 1 change

1h 33m • 1 change

1h 26m • 1 change

1h 44m • 1 change

1h 36m • 1 change

1h 33m • 1 change

1h 26m • 1 change

1h 44m • 1 change
Want to know about travelling from Princeton Junction to Union? 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 Princeton Junction to Union. However, there are services departing from Princeton Junction station and arriving at Union station via Secaucus Upper Level. The journey, including transfers, takes approximately 2h 1m.
Princeton Junction to Union train services, operated by NJ Transit, depart from Princeton Jct. station.
Princeton Junction to Union train services, operated by NJ Transit, arrive at Maplewood station.
The distance between Princeton Junction and Union is 51.9 km. The road distance is 90 km.
You can take a train from Princeton Jct. to Maplewood via Secaucus Upper Level in around 2h 7m.