Chicago's train system is called the "El" (or L), as most of the tracks are above ground and elevated. It's run by the Chicago Transit Authority (CTA). Most of Chicago's major tourist attractions are located within walking distance of a stop, and it is definitely the most convenient way of getting around the city. There are 144 stops along 8 lines, with 360km of tracks. The Loop is the most serviced part of the city, as seven of the eight lines pass through.
Visitor passes are sold at stations and larger hotels. A 1-Day pass is $5.75, a 3-Day pass is $14.00, a 7-Day pass is $23, and a month pass is $86. They provide for unlimited bus and El trips during the given period. A single trip costs $2.25, plus an additional $.25 for a transfer.
Beyond city limits, Metra commuter lines connect Chicago to its outer suburbs and points beyond in southwestern Wisconsin and northern Indiana. Metra tickets are separate from the L. Tickets start at $2.00 and weekend passes are available for $7.00.
The trains are a little dated, but still comfortable. Some people avoid the trains at night after 23:00, but they are still relatively safe. If possible, try to avoid the system during rush hour, as things can get uncomfortably crowded.
Chicago Transit Authority (CTA)
Telephone: 1 888 968 7282
Telephone: (312) 322 6777