robertgills1142 – https://airlinesofficesworld.com/airlines-offices/united-airlines/united-airlines-headquarters/

This location places it within the Willis Tower (formerly known as the Sears Tower), one of the tallest buildings in the United States. Occupying several floors of this iconic skyscraper, the headquarters offers a commanding presence in downtown Chicago, with convenient access to United’s operational hub at O’Hare International Airport (ORD).