The Gunnison Airport (GUC) is very convenient for your trip to Crested Butte. Just 28 miles away, the number of flights each day vary depending on the time of year. During the winter you can fly here from Denver, Dallas, Houston & Chicago on United Airlines and American Airlines.
I think it is helpful to know that Montrose Airport (MTJ), only 90 minutes from Crested Butte, has flights from a number of cities, so if you can't find your flight into Gunnison Airport
, you should check out Montrose Airport
, Grand Junction
(2 1/2 - 3 hours, GJT), Colorado Springs
(3 1/2 - 4 hours, COS) and Denver
(4 - 4 1/2 hours, DEN).