Although Ibiza is a small island it can be difficult getting around. Hiring a scooter is a great way but its not for everyone, especially if you are used to driving on the other side of the road.
Taxis can be quite expensive, and if you do not know Spanish it can be difficult sometimes explaining where to go. For those on a budget and travelling to the busiest places (San Antonio, Playa Den Bossa etc) the bus is a great option.
If you want to catch the bus from Playa Den Bossa or San Antonio to Ibiza Town its about 2 euro. There isn’t a direct bus from Playa Den Bossa to San Antonio and vice versa so you have to change in Ibiza Town which will cost another 2 euro approx. This is because there are 4 bus companies running in Ibiza so the busses do not go direct, it also means that you sometimes need to wait up to 30 minutes when changing buses. The longest it should take to travel between the two is 90 mins with waiting time.
As the season picks up more buses run and you can also take advantage of the Disco Bus service which takes you direct to nightclubs.