1 Other types of headaches can also cause severe pain, and not all headaches are migraines. For example, some people describe the pain of cluster headaches as the worst pain they have experienced.  The exact cause of migraines is not known.
Another major airport is Aspen-Pitkin County Airport (ASE / KASE), which has domestic flights from Aspen, Colorado and is 98 miles from Vail, CO.Search for direct flights from your hometown and find hotels near Vail, CO, or scroll down for more international airports or domestic airports.nother major airport is Aspen-Pitkin County Airport (ASE / KASE), which has domestic flights from Aspen, Colorado and is 98 miles from Vail, CO.
Major cities near Keystone, CO. This is a list of large cities closest to Keystone, CO. A big city usually has a population of at least 200,000 and you can often fly into a major airport. If you need to book a flight, search for the nearest airport to Keystone, CO. 1  52 miles to Denver, CO. 2  60 miles to Aurora, CO. 3  80 miles to Colorado Springs, CO. 4  315 miles to Albuquerque, NM. 5  470 miles to Lubbock, TX.