7news in Denver was among the stations covering the weird event.. The flight path was an oval over Denver .. The plane then apparently left the city limits and flew to Oklahoma City..
From the report:
When contacting the military, including both U.S. Northern Command (NORTHCOM) and United States Strategic Command (STRATCOM), neither organization could confirm the identity of the plane, or even locate it.
The North American Aerospace Defense Command (NORAD) also investigated the flight, however they couldn’t locate the flight or confirm its existence. When asked if the flight might have been a high-profile person, officials said the only high-profile flights in the air were in New York and Indiana.