We were out ther in early September last year and really struggled to find places open. Les Gets and a bagel closed after the first week of September, and nowhere else in France seemed to be open. Tignes, Les Arcs, Alpes D’Huez, Les 2 Alpes, Morzine (and most of PDS), Samoens and La Thuile were all closed. Verbier in Switzerland was open (not far from Morgins in PDS) but not a lot there(official tracks anyway), was really expensive and was bloody freezing. Livigno in Italy has a really long season and lots of great tracks for all skill levels, I’d consider going there if I went out again that late, long trails, decent weather, cheaper than Switzerland and everyone was friendly and helpful.
Finale Laguire is open, but it’s all uplifted rather than ski lifts (and seemed geared to groups of 4+ rather than just myself and the GF. I think there’s some lifts open around the Lame Garda area as well, but we headed home before exploring them as the weather took a turn for the worse last year.
Tom KP