Travelers are voting Denver International Airport and Erie Municipal Airport as the best airports in Denver. There are 2 airports in Longmont a city just 30 km from Denver and 2 airports in Lyons which is 36 km distant. The most popular of these are Erie Municipal Airport in Longmont and Fort Collins-Loveland Municipal Airport in Lyons. You can find 11 airports in Colorado and 695 airports in the country of United States. Our members favorite in Colorado is Denver International Airport and Ofu Island Airport is the top pick in United States. Want more? Check out our map of airports in Denver.