Regional Train Service (TER)
Regional Train Service (TER) – first time visitors to Monaco are likely to fly into Nice International Airport, since that’s the nearest international airport proximate to Monaco. Such visitors have the option of travel by train to Monaco from Nice (as well as from other parts of the South of France). The French regional train line that covers that rail route is TER (part of the SNCF French rail system).
A typical one-way train ride from Nice to Monaco station is just €4. Visit the TER/SNCF website for more info: www.ter.sncf.com