On arrival there is a regular bus service from Genève airport to Les Contamines (www.sat-montblanc.com), trip can last from 1 hour 45 minutes to 2 hours 30 minutes, price for a one way ticket is 35 euros per person; also possible is to prebook a private transfer (www.alpybus.com), price is 230 euros up to 4 people.
We suggest you to arrives in Les Contamines or at La Fayet train station before 1.30 pm, so you can also decide to make the long walk.
If you travel by train, the closest train station is La Fayet d’en Haut (for train timetables //en.voyages-sncf.com/en/): from there you can decide to do the longer walk starting in Col de Voza, by taking the tramway of Mont Blanc (www.compagniedumontblanc.fr) or the shorter walk, by taking the bus to Les Contamines-Montjoie, which runs several times a day, except on Sundays.
If you travel by car, you can park in a public car park at the start of the walk in Les Contamines-Montjoie.
On departure day from Argentière, you can walk to Montroc (3 km far) and take the train from Montroc – Le Planet to Martigny and from there a train to Genève (If you travel by plane) or to Le Fayet and from there the bus to Les Contamines-Montjoie (if you travel by car).