Which airport in France is best for Vezelay?

no airport is particularly near, and Vezelay is not the simplest of places to get to (other than on foot, of course). Easiest is probably to go to Paris, and catch the Avallon train. An obscure station called Sermizelles is the official halt for Vezelay, and there is some sort of shuttle bus service. (Alternatively, walk, as the GR isn't that far away - ca 10km to Vezelay.) You can get the train timetable at http://www.ter-sncf.com/bourgogne/ and the official town site is http://www.ville-vezelay.com/ - they can no doubt give you more info on the shuttle bus.