150 connected flights daily fly into Aspen/Pitkin County Airport which is 3 miles from the town of Aspen.
Aspen Snowmass is 220 miles from Denver International Airport (DIA) and 40 miles from the Glenwood Springs Train Station. Rental cars and shuttle buses are available from Aspen/Pitkin County Airport, Denver and Glenwood Springs.
All four Aspen mountains are linked together by free and efficient shuttle buses. If you do have your own car beware that parking in the town of Aspen can be expensive. If you do rent a car a 4WD with snow tires would be highly recommended as the roads are often snow covered.