ULCC

Frontier Group Holdings, Inc.

An ultra-low-cost airline based in Denver, Frontier carries budget travelers across the United States on flights out of its Denver hub. The modern carrier was founded in 1994 by former employees of an earlier airline of the same name, which itself began in 1950 through a merger of three Rocky Mountain region carriers. Its planes are famous for the "menagerie" painted on their tails—each aircraft sports a named animal like Grizwald the Grizzly Bear.