O'Hare is about 7,627 acres, or 11.25 square miles. That roughly covers the area from the Loop north to Diversey, and west to Humboldt Park.
May 19 at 8:04 PM
O'Hare's call letters are ORD because, until 1949, the airport was called Orchard Place.
January 10 at 1:39 PM
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