it’s possible they will load exception dates to the start of standard “ski season” travel at a later date. But UA would need to do so very soon given December is only three months out. Or it’s possible there weren’t enough passengers last year during this timeframe. Snow isn’t usually reliable that early in the season.

I was booked on that flight last year during the first week of December but then switched to another resort when the entry restrictions were announced. I would have been able to enter, but it was part of a multi-leg trip that I was concerned would get messed up if further restrictions were imposed mid-trip.