Originally Posted by
LKHK
b) buy public transport tickets from the Transport Company (DPP) booth (in both arrival halls, close to the exit from airside, open daily 7-22), look for illuminated red-white sign with Bus-Tram-Metro. You will need 20 CZK ticket to get from the airport. They accept plastic money, even if you pay for just two tickets (40 CZK). They also sell the the multi-day public transport passes (good for unlimited travel on any bus, metro, tram and Petrin funicular train for 24/72/168 hours) I mentioned earlier.
To get a better idea I took pictures of the Public Transportation Co. (DPP) booths at Prague Airport
Terminal 2 (this is what you will see as you exit customs):
http://fotoalba.cz/fotky/7024269
Terminal 1 (this is what you will see as you exit customs):
http://fotoalba.cz/fotky/7024268
(
4th booth from the left, with Metro-Tram-Bus sign)