High-altitude ski + summer mountains. KASE direct or KEGE for larger jets.
Aspen-Pitkin County (KASE) is one of the most demanding fields in North America — short runway, high altitude, mountain weather. Most operators clear KASE down to LJ45 / Phenom 300 class; larger jets divert to Eagle (KEGE) with a 70-minute road transfer. Charter from the coasts cuts a 12-hour day to four.