It is also the United destination that has the most Airbus A319 operations for the carrier. In addition to United, operators like Delta Air Lines and Allegiant also fly to the Mile High City with ...

is one of North America's largest ultra-low-cost airlines and has been flying for over 20 years. Allegiant operates a fleet of Airbus A319 and A320s that are set to be joined by the Boeing 737 MAX ...