Aspen-Pitkin County Airport (KASE) sits at 7,820 feet elevation in a Rocky Mountain valley three miles northwest of downtown Aspen, Colorado. It is one of the most operationally demanding airports in the United States for business jets, and a defining stop on the winter ski-charter and summer mountain circuit. The combination of high elevation, surrounding terrain, a single 8,006-foot runway (15/33) with significant slope, and frequent shifting mountain winds means KASE has aircraft type restrictions and a daily slot system that brokers absolutely must build into any Aspen booking.
Not every business jet is approved for KASE — the airport publishes a specific aircraft authorization list, and the curfew (2300–0700 local, expanded during ski season) is strict. Single-pilot ops are generally discouraged, and most operators require captains have specific high-altitude mountain-airport training and recent KASE experience. The two FBOs (Atlantic Aviation and Signature) handle the bulk of charter traffic, with a strong fractional presence (NetJets, Wheels Up, and Flexjet all have heavy KASE volume in season). Density altitude in summer (highs in the 80s°F at 8,000 feet of pressure altitude) is genuinely operationally limiting on heavy departures. The X Games in late January and the Aspen Ideas Festival in late June are the two structural peak weeks; planners should book ramp slots three to six months out for either.
Frequently asked questions about Aspen-Pitkin County Airport (Sardy Field)
What is KASE airport?+
KASE is the ICAO code for Aspen-Pitkin County Airport (Sardy Field) (IATA ASE), located in Aspen, CO.
What does ASE stand for?+
ASE is the IATA code for Aspen-Pitkin County Airport (Sardy Field) (ICAO KASE) in Aspen, CO.
Where is Aspen-Pitkin County Airport (Sardy Field)?+
Aspen-Pitkin County Airport (Sardy Field) is located in Aspen, CO.
Does Aspen-Pitkin County Airport (Sardy Field) have commercial airline service?+
Yes — Aspen-Pitkin County Airport (Sardy Field) is served by scheduled airlines in addition to private aviation traffic.
How long is the runway at Aspen-Pitkin County Airport (Sardy Field)?+
The longest runway at Aspen-Pitkin County Airport (Sardy Field) measures 8,006 ft (2,440 m).
What is the elevation of Aspen-Pitkin County Airport (Sardy Field)?+
Aspen-Pitkin County Airport (Sardy Field) sits at 7,820 ft above sea level.
What timezone is Aspen-Pitkin County Airport (Sardy Field) in?+
Aspen-Pitkin County Airport (Sardy Field) operates on America/Denver.
How many private-jet empty legs are available at Aspen-Pitkin County Airport (Sardy Field)?+
SkyAccess currently tracks 62 departing and 109 arriving private-jet empty legs at Aspen-Pitkin County Airport (Sardy Field) over the next six months. Browse and book each leg with a free account.