Not normally pushed as a ski destination except by easyJet but think about Nice. Very high frequency on BA/U2. Good destinations within 90 minutes - Isola 2000, Auron, Limone etc with plenty of smaller ones. Good intermediate skiing, great scenery. Almost guaranteed fabulous snow due altitude and micro climate and there is the added bonus that it may be 20C on the coast at the same time so you can spend the day shopping, sightseeing or on the beach in Nice/Monaco/Cannes etc.