The average train between Gaithersburg and Princeton Junction takes 3h 54m and the fastest train takes 3h 18m. There is a train service every few hours from Gaithersburg to Princeton Junction. 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 Gaithersburg and Princeton Junction. The earliest departure is at 5:44 AM in the morning, and the last departure from Gaithersburg is at 11:31 PM which arrives into Princeton Junction at 7:47 AM. All services require a transfer at Union Station, Red Line Center Platform and take an average of 3h 54m. The schedules shown below are for the next available departures.
Arrives next day


3h 46m • 2 changes
Arrives next day


8h 16m • 2 changes


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3h 37m • 2 changes


3h 57m • 2 changes


3h 30m • 2 changes


3h 54m • 2 changes


3h 37m • 2 changes


3h 57m • 2 changes


3h 30m • 2 changes


3h 54m • 2 changes


3h 37m • 2 changes


3h 57m • 2 changes


3h 30m • 2 changes
Want to know about travelling from Gaithersburg to Princeton Junction? 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 Gaithersburg to Princeton Junction. However, there are services departing from Gaithersburg station and arriving at Princeton Junction station via Union Station, Red Line Center Platform station. The journey, including transfers, takes approximately 3h 54m.
Gaithersburg to Princeton Junction train services, operated by Washington Metropolitan Area Transit Authority, depart from Shady Grove, Red Line Center Platform station.
Gaithersburg to Princeton Junction train services, operated by Washington Metropolitan Area Transit Authority, arrive at Trenton station.
The distance between Gaithersburg and Princeton Junction is 256.4 km. The road distance is 312 km.
There is no direct connection from Gaithersburg to Princeton Junction. However, you can take the subway to Union Station, Red Line Center Platform, walk to Washington, Columbus Circle, Union Station, take the train to Trenton, walk to Trenton Transit Center, then take the train to Princeton Jct..