From the airport, get off at Meyrin Geneva-Centre and head in the direction of Vernier-Zone Industrielle. After 400 m (approx. 1200 feet), to the stoplights, turn left toward Geneve-Centre. Drive 1300m (just under a mile) and turn right on to Carouge-Perly to arrive at le Pont Butin.
Take the Bernex exit and get on to Route de Chancy heading toward Geneve-Onex. After 2.5 km (1.5 miles), make a U-turn and turn right onto Avenue des Morgines.