For those non-Colorado folks who have planned to fly to Denver and drive to Aspen, note that I-70 thru Glenwood Canyon is going to be highly questionable this year. The huge Grizzly Creek fire in summer of 2020 did not cause too much trouble last ski season, but this summer monsoon season's heavy rains have taken a huge toll on the highway and canyon. While CDOT says they expect to have 2 lanes open in a couple of weeks, the prospect for all four lanes open is "Hopefully before ski season". That's if we don't get any more storms. Cold winter storms will be lower risk, but a storm with rain at 6,000 ft elevation is likely to close it (both for predicted rain, or actual mud or avalanche).
Glenwood Canyon epic mud-barf across I-70. Not just mud, significant damage to the road from logs and truck-sized boulders.
The detour adds about 4 hours travel time to Aspen, north from Silverthorne through Steamboat Springs, making the total drive from Denver about 7 hours ( travel times assume good weather -- for driving, not skiing).
Might be a good idea to fly into Aspen, instead of making the Denver drive, even though Aspen airport has higher risk of flight delays/diversions.
If flying/driving, from Salt Lake, about 6-1/2 hours might be a better option, with Alta/Snowbird, or Deer Valley good Ikon pass side-trips. (just one not-usually-very-gnarly pass, Soldier Summit in Utah)
The southern alternate route, over Monarch pass (and several other passes) is 392 miles from Denver, currently Google maps says 7 hours, 49 minutes. (hmm, it's 9 am, still 4-1/2 hour drive-time to Snowmass. might as well ski powder at Monarch....)
Or, Hey! WP and Steamboat are on Ikon! and good stop-overs along the north detour between Denver and Aspen, in addition to Copper, which is still sort-of along the way (for either north or south detour).
Consider flying to Montrose, now called Montrose/Telluride (MTJ) with plenty of mainline flights in the winter from "Back East" as we call it. JetBlue, United, American and Southwest non-stop from Boston !!! NYC, Charlotte, Chicago, DFW, Houston, in winter 2020/2021, there may be more options this year. It's about a 3-hour drive Montrose to Aspen, easier/shorter than from Denver even if I-70 is open, 2 routes (a shorter, twisty fair-weather route goes over McClure pass, or thru Grand Jct. in stormy weather-- many more miles, but better/faster roads, no passes)
Note: It's 1-1/2 hours to Telluride or CB from MTJ, both are Epic Pass resorts and out-of-the-way for also getting to Aspen (I strenuously resist calling them Epic resorts, although both can be very nice.... if you can ski multiple ski galaxies in one season)
Hmmm, could also fly in to Hayden/Steamboat.... but would still be a long drive from there to Aspen.
Last time I got on an airplane to go skiing, it was on Southwest, PHX to Albuquerque, over 25 years ago (to Ski Taos and other NM ski areas). so be careful who your internet "expert" is......
Flying to Grand Jct. is another option (GJT, regional jet connect from DFW, PHX, SLC or DEN, very often extra $) , 2 hours to Aspen/Snowmass.
Flying to Eagle (EGE) to get to Aspen/Snowmass is a Bad Idea this season, it's on the wrong side of Glenwood Canyon, and too close to the crowded Epic vortex of BC/Vail.
