At approximately 4:15 PM on November 7, 2006, as the afternoon push of flights was underway at Chicago's O'Hare International Airport, a United Airlines ramp worker at Gate C-17 in Concourse C looked up and noticed a dark, metallic, saucer-shaped object hovering silently about 1,500 feet above the terminal. Within minutes, multiple airline employees, a mechanic, and at least one pilot preparing to push back had all seen the object. Witnesses estimated its diameter at roughly twenty to twenty-four feet and described it as perfectly circular, with no lights, no markings, no engine noise, and no visible means of propulsion.
The object hovered in place for several minutes as Flight 446 prepared to depart for Charlotte. Then, according to multiple witnesses, it abruptly shot straight up with such force that it punched a clean, disc-shaped hole through the cloud layer overhead, leaving a visible ring of blue sky before the clouds slowly refilled.
United Airlines and the Federal Aviation Administration initially denied any knowledge of the incident, but after the Chicago Tribune reported the story on January 1, 2007, the FAA conceded that a supervisor at O'Hare had reported an unidentified object but classified the event as 'a weather phenomenon,' most likely a hole-punch cloud caused by an aircraft exhaust. Meteorologists and the witnesses themselves rejected this explanation, noting that hole-punch clouds form over minutes, not seconds, and that the saucer had been directly observed by trained aviation professionals.
Because O'Hare is one of the busiest airports in the world and the sighting occurred over a terminal gate in daylight, the case drew intense scrutiny. No radar confirmation was ever released. The 2006 O'Hare disc remains one of the most widely witnessed modern UFO incidents in a major civilian airspace, and it sparked renewed public and congressional interest in how such events are reported and classified.