Chicago's CTA runs eight 'L' lines and 127 bus routes around the clock's needs: the Blue Line links O'Hare to downtown 24/7 for $5, a $5 day pass covers everything, and the trains double as the cheapest architecture tour in the country.
The fare math is the friendliest of any big American airport city: 'L' rides cost $2.50, buses $2.25, transfers within two hours are free, and the $5 one-day pass caps a full day of unlimited riding at the price of a coffee. Ventra is the key — the app, a contactless bank card or phone tap all work; only the O'Hare Blue Line boarding carries a $5 premium fare, waived entirely if you hold a pass.
Two lines run all night: the Blue from O'Hare through the Loop to Forest Park, and the Red from Howard to 95th. The Orange Line covers Midway in 25 minutes. For the classic visitor circuit — Loop, River North, Lincoln Park, Wicker Park — the Brown and Purple lines do the scenic work above the streets the system is named for.
Intercity buses stage from the Chicago Bus Station at 630 West Harrison, a block south of Union Station: Greyhound, FlixBus and Barons run the Midwest spokes — Madison, Milwaukee, Indianapolis, Detroit — with Van Galder the Wisconsin specialist. Metra's eleven commuter lines reach 240-plus stations across the region from four downtown terminals, Union Station and Ogilvie chief among them.
On the water, the Chicago Water Taxi runs the river between Michigan Avenue, the Loop and Chinatown in season — a commute that photographs like a tour. And the Pedway, five miles of connected underground concourses beneath the Loop, is the locals' winter answer to January: learn its entrances and you cross downtown without a coat.
Our read: buy the $5 day pass before you leave the airport and never think about fares again — it even cancels the O'Hare surcharge. Ride the Brown Line loop at golden hour for the architecture, take the Red Line north for the neighborhoods, and use the 146 or 151 buses up Lake Shore Drive as the sightseeing ride they secretly are. Chicago is one of the last American cities where a visitor can honestly skip the car; the system rewards the ones who do.
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