> O'Hare airport sits some 40km outside Chicago. It's more like 25km (15 miles) to the city center and 4km (2.5 miles) to the city limits, although technically

> O'Hare airport sits some 40km outside Chicago. It's more like 25km (15 miles) to the city center and 4km (2.5 miles) to the city limits, although technically O'hare is within the City of Chicago. There's a strip of City land between the eastern edge of the airport that cuts through the suburb of Rosemont to connect to the Oriole Park neighborhood (although that might be Edison Park), on the far Northwestern edge of the city. 40km will get you to the far south side of the city, for which there's Midway.