O'Hare Airport Blue Line View Schedule on CTA Website View Full System Map O'Hare Airport - Average Ridership by Type of Day for September JanuaryFebruaryMarchAprilMayJuneJulyAugustSeptemberOctoberNovemberDecember Chart JSON If this is blank, your library will need to implement code in your JavaScript. Please see the README.md. Related Jurisdictions Council of Mayors Chicago Chicago Ward Ward 41 Anthony Napolitano County Cook Illinois House District 77 Norma Hernandez Illinois Senate District 39 Don Harmon Municipality Chicago US Congressional District 5 Mike Quigley