line,north_or_outer_terminal,south_or_inner_terminal,stations,route_miles,twenty_four_hour,notes
Red,Howard,"95th/Dan Ryan",33,23.4,yes,"North side to south side through the State Street subway. The busiest line on the system."
Blue,"O Hare Airport","Forest Park",33,26.9,yes,"The longest line. Serves O Hare and runs through the Dearborn Street subway downtown."
Brown,Kimball,"The Loop",27,11.3,no,"The Ravenswood branch. Connects north side neighborhoods to the northwest corner of the Loop."
Green,Harlem/Lake,"Ashland/63rd and Cottage Grove",31,,no,"Two southern branches from a single northern terminal, so check which branch a train is running."
Orange,"Midway Airport","The Loop",16,13.0,planned,"Serves Midway. Twenty four hour service was planned to begin in 2026."
Pink,54th/Cermak,"The Loop",22,11.2,no,"Uses former Blue Line tracks west of Damen and enters downtown on the Loop elevated."
Purple,Linden,Howard,11,3.9,no,"Regular service runs Linden to Howard through Evanston. Some weekday peak trains run express to the Loop."
Yellow,Dempster-Skokie,Howard,3,,no,"The Skokie Swift. Connects the northern end of the Red Line to Skokie."