Frontier Airlines Pilot Wing 2nd Issue
Used Between 1955-1963

There are two color varieties of this issue. One is turquoise and the other is dark green.

Denver, CO 1946-1986

Started s Monarch Air Lines in 1946. Acquired Challenger Airlines in 1949. Merged with Arizona Airways in 1950 and name changed to Frontier Airlines same year. Purchased by Continental Airlines in 1986. Frontier II started in 1994.