Frankfurt's local transport consists of commuter trains, streetcars, buses and an underground system. The Verkehrsgesellschaft Frankfurt am Main - or Frankfurt Transport Authority (VGF) - is Frankfurt's main public transport operator. The public transit system in Frankfurt is also part of the Rhein-Main-Verkehrsverbund (RMV) who is the operator of one of Germany's largest public transport networks.
There are several types of tickets to buy whether you are a day guest or travelling in a group. Tickets can be bought from four sales outlets of VGF, (Hauptwache, Konstablerwache, Bornheim Mitte underground station, Höchst station) including from ticket machines, card-o-mat machines and at numerous private sales outlets. You can also get your ticket on the bus. Weekly, monthly and annual tickets can be ordered online. Tourists can also purchase a "Frankfurt Card" with unlimited travel, discounts at museums and guided city tours. The card is available at visitor information centres, travel agencies, the main train station and the airport.
Information about public transport at night: www.rmv.de/c/de/linien-netze/streckennetz/nachtverkehre/nachtverkehr-frankfurtrheinmain/