The Prague City displays one of the best public-transport systems in Europe, which includes Metro, tram, bus and some railway lines.
Public transport tickets valid for Metro (subway), bus, and tram must be purchased before boarding and immediately validated on the first use of a transport medium by one of the ticket cancellation machines placed inside the vehicle or at the subway entrance. On all stations, the time table as well as a list of line stations can be found.
The tickets are available at most of the newspaper (cigarette, tobacco) stands, in small shops, and from special vending machines and also from a bus drivers or ticket sales in underground stations. You can buy two types of tickets for a single trip:
Day operation – Vaclav Havel Airport Prague (pdf to download)
Prague day transportation operation - metro and trams (pdf to download)
Prague Metro operation (pdf to download)
Other plans available here