By train: Guildford Railway Station is served by regular trains to/from London Waterloo and Victoria.
Once you have alighted your train, walk up the stairs to the bridge and turn left towards Guildford Park Road. Turn right out of the station onto Guildford Park Road, at Ridgemount turn right following the pedestrian signs for the Cathedral. It is a 10 minute up-hill walk from the back of the station to the Cathedral.
By bus: There are several routes that stop at the bottom of Stag Hill, leaving a 5 minute up-hill walk to the Cathedral. Routes 3, 27 and 37 go through the University. Routes 4 (to Guildford Bus Station past the Railway Station) & 5 (from the Bus Station past the Railway Station) go along Madrid Road to the bottom of Cathedral approach.