From the station "Gare Cornavin":

     - Bus line 19 direction Vernier-village, get off at Ste Clotilde (1 on the map)
     - Tram line 14 direction P+R Bernex, get off at Jonction (2 on the map)

From the airport:

     - Bus line 10 direction Rive, change at Bel-Air for Bus line 2 direction Onex-Cité, and stop at Ste Clotilde (1 on the map)

You can also have a look here ...