Public transportation in Ibiza is limited to buses and taxis. 

There is a bus service from the Ibiza Airport to Avenida Isidoro Macabich in town, with connecting service to other parts around the island.  The fare is 1.20 Euros.  Buses depart from the terminal every half hour between 7:20 am and 10:50 pm for the 30 minute trip.  The buses have room to accommodate your luggage.  A bus schedule is available online.

Taxis are readily available at the airport, and they can also be found circulating around the island and at designated taxi stands.  A taxi will display a green light when it is available.   Fares typically start at 2-3 Euros depending on the time of day, with mileage rates around 1 Euro per kilometer.  Out of town fares have higher rates, and there is an additional charge of 1.40 for service from the port or the airport.