Getting your player ready...
Frontier Airlines will celebrate its 15th anniversary Sunday with employee events, although no public festivities are planned.
The Denver-based airline is the second-largest carrier at Denver International Airport, with 5,000 employees and 350 daily flights to more than 50 destinations in the U.S., Mexico and Costa Rica.
The original Frontier operated in Denver for 40 years before it was purchased in 1993. The current airline was launched July 5, 1994, with 180 employees and two jets on routes between Denver and Bismarck, Grand Forks and Minot, N.D.



