The Blue Line is a route on the CTA rail system, operating from O'Hare Airport in Chicago to Westchester, IL. It runs 24 hours a day, 7 days a week. It was extended from Forest Park, IL (Forest Park Road) to Westchester, IL on May 20th, 2015.
Station listing (with transfers)
Des Plaines (Forest Park-bound only)
Clark/Lake (Orange, Green, Pink, Brown Lines, Purple Line Express)
Washington (Red Line)
Monroe (Red Line)
Jackson (Red Line, Orange, Pink, Brown Lines, Purple Line Express)
Clinton (Metra, Amtrak trains, Greyhound buses)
United Center-Medical District
All trips between 1:00 AM and 4:00 AM (Monday-Saturday) and all trips between 11:00 AM and 4:00 on Sundays end at Forest Park.