where is denver airport
Denver International Airport is the main hub for low-cost carrier Frontier Airlines and commuter carrier Great Lakes Airlines. It is also the fourth-largest hub for United Airlines. The airport is a focus city for Southwest Airlines. Since commencing service to Denver in January 2006, Southwest has added over 50 destinations, making Denver its fastest-growing market. Denver International Airport is 19.5 miles (31.5 km) further from downtown Denver than Stapleton International Airport, the airport it replaced.