The airport is very close to downtown Geneva and transportation is very simple.  Two ways to get to the city centre from the Airport:

1. Walk to the airport railway station and take the first train leaving. All trains stop at Geneva main station ("Gare Cornavin"), which is the first stop. The ride takes 6 minutes. 

2. Take the bus lines 5 (direction to Thônex, Vallard) or 10 (direction to Genève, Rive) outside the airport building (20-25 min)

 

 

At the railway station (Gare Cornavin), you will find many trams and buses which will take you to your final destination.