From Messina or Palermo take the Catania Centro exit (Porto).
Take the AMT city buses or the Metro to Stesicoro station. (Ticket cost € 1 for 90 minutes).
From the airport you can take the shuttle bus called ALIBUS(there is every 20 minutes from 5:00 till 24:00), which will reach the historical centre in about 15 minutes.
Exit the port and turn left towards Via Cardinale Dusmet for about 300 meters, then turn right at the road and take Piazza Duomo. Head down the left side of the square and continue on Via Erasmo Marletta. Turn left onto Via Roccaforte and then right onto Via Barone della Bicocca. Sleep Inn will be on the left.