The three nearest airports serving Chamonix-Mont-Blanc are Geneva, Chambery and Turin. Geneva is about 100 km from the resort and is the airport of choice. Its official name is Genève Aéroport and it is located just 4 km northwest of the city center.
The airport is located between the commune of Meyrand (France) and the commune of Grand Sakonnet (Switzerland), along the northern part along the Swiss-French border. It is therefore divided into Swiss and French sectors. The airport can be accessed from the territories of both countries. The IATA code of the Swiss sector is GVA, and that of the French sector is GGV.
From here it is just over an hour by car or bus to the resort. The website for the Geneva airport serving the Chamonix-Mont-Blanc resort is here. And if you don't want to get lost, you can use the airport diagram for the quickest way to Chamonix-Mont-Blanc.