She was taken to Lutheran General Hospital in serious-to-stable condition, the Chicago Fire Department said.
The woman was struck Tuesday around 2:30 p.m. outside the United Airlines Terminal 1 at O'Hare. She was in the outer lanes on the terminal's lower level. \p>
The bus driver was cited. Jaime Flores, 50, of the 1500 block of North 43rd Street in Stone Park, was issued one citation for striking a pedestrian in a roadway, police said.
The Sun-Times Media Wire contributed to this report.