Aspen/Pitkin County Airport (IATA: ASE, ICAO: KASE, FAA LID: ASE), also known as Sardy Field, is a county-owned public-use airport located three miles (3 nmi; 5 km) northwest of the central business district of Aspen, in Pitkin County, Colorado, United States.

[1] The Federal Aviation Administration (FAA) National Plan of Integrated Airport Systems for 2023–2027 categorized it as a non-hub primary commercial service facility.

[4][5] A private gravel airstrip opened on the Stapleton ranch in 1946, promoted by Walter Paepcke and John Spachner.

[6] For the 12-month period ending November 30, 2020, the airport had 38,584 aircraft operations, an average of 106 per day: 52% general aviation, 29% air taxi, 18% scheduled commercial, and 1% military.

In addition to regular service from Denver, Aspen sees more than 20 flights a week from Chicago and Los Angeles.

[10] The Aspen/Pitkin County airport terminal is a 44,000 square feet (4,100 m2) single floor facility, which has undergone several renovations since its original construction in 1976.

The 40 spaced parking lot is located to allow motorists to loop and re-access the terminal without getting back on Colorado State Highway 82.

[12] The airport has several unique operating limitations due to local legislation, the constrained size of the airfield, and its location in a high elevation mountain valley.

[13][14] These restrictions influence the commercial airline services provided at ASE, which must use regional aircraft to comply with the weight and size limits.

Jet aircraft with louder engines, under the FAA Stage II category, are permitted to take off no more than 30 minutes after official sunset.