Spectators may normally enter the O2 arena 1.5 hour before the event. This may be changed based upon an agreement between the event promoter and the O2 arena Operator.

Spectators enter the O2 arena by the North entrance located on the 1st Floor accessible from Ocelarska St., the Ceskomoravska underground station and Sokolovska tram stops. This entrance in the O2 arena features 18 turnstiles and 2 gates for people with disabilities.