The Mile High City sees the most of the operation, but other hubs also get the carrier's smallest mainline aircraft.

GE Aerospace has emerged from the former GE conglomerate as a formidable and focused turbine engine producer, powering about three of every four commercial airline flights.

United Airlines will operate its Dulles-Albuquerque route with an Airbus A319 initially, switching to a Boeing 737-700 later ...