American Eagle Airlines, the regional affiliate of American Airlines, announced it will begin nonstop seasonal service between Aspen/Pitkin County Airport in Aspen/Snowmass, Colo., and both Dallas/Fort Worth International Airport and Los Angeles International Airport, beginning Dec. 15. Eagle will operate the daily trips with two-class CRJ-700 jet aircraft. The service will run from Dec. 15 through April 2, 2012; then resume June 14 through Aug. 20, 2012. Customers may begin booking the new service beginning Monday, Aug.1