Chicago-based United Airlines is looking to develop more than one million square feet of office space on a 113-acre parcel of land close to Denver International Airport for 6,000 of its employees.

In 2023, the airline bought the land and, at the time said, “it was using part of the land to build a pilot training facility,” according to a story in The Denverite. But that may change.

“United’s projected expansion of its flight training center facilities is the primary impetus for developing the site … Some uncertainties remain regarding the building uses included in the future development of the site,” according to the new filing.