Centennial Airport — Denver, United States

South of downtown Denver in Arapahoe County, Colorado, Centennial Airport carries the code APA and climbs to a high-altitude elevation of 5,885 feet consistent with the Front Range. Three runways support one of the busiest general aviation operations in the United States, handling corporate jets, flight training, and charter traffic rather than scheduled airline service. APA operates separately from Denver International Airport, which manages the metro area's commercial flights, giving Centennial a distinct focus on business and private aviation. Colorado's thin mountain air affects aircraft performance calculations at this elevation, a factor pilots based at APA must account for given the field's altitude and three-runway layout.