Challenger began life as Summit Airways, a Wyoming corporation, organized on December 31, 1941. Summit limited its activities to flight instruction, buying and selling airplanes, and non-scheduled air carrier service.
The founders and owners of Summit were Charles W. Hirsig II, President until his death January 15, 1945, Fred M. Manning, George J. Forbes, and Fred O. Rice. George J. Forbes was the second President from January, 1945 until January 7, 1947 when George W. Snyder, Jr. took over.
Donald A. Duff became Challenger's fourth and final President in Feb. 1948 and served until the merger June 1, 1950 when he became a Vice President at Frontier Airlines.
The CAB granted a certificate on March 28, 1946 to operate air carrier service from Billings to Denver to Salt Lake City with intermediate stops. The name of the company was changed to Challenger Airlines on January 7, 1947.
On February 8th a down payment of $25,000 was made to Capital Airlines for two DC3s (NC65135 and NC65385) and air service started on May 3, 1947 from its base of Salt Lake City. The first route was to Denver with stops in Kemmerer, Rock Springs, Rawlings, Laramie, and
That summer another route to Billings was started with stops at the Big Horn Basin. A third route started the same time linked Billings and Riverton to the system. By then ten Wyoming communities had air service to Denver, Billings, and Salt Lake City.
By 1948 their headquarters had been moved to Denver and they had started sharing various functions such as maintenance and sales with Monarch Airlines.
Challenger's service was a godsend in the blizzard of February, 1949 when they flew thousands of passengers and tons of food and supplies throughout their route system.
Monarch Airlines bought controlling interest in Challenger in December, 1949 and the merger became effective June 1, 1950. Arizona Airways was also included and the three-way merger formed Frontier Airlines.
The airline had four DC3s at the time of the merger: NC65135, NC65385, NC53376, and NC65276. They became Frontier Sunliners Montana, Colorado, Wyoming and North Dakota.