 
                Last summer I was flying to the UK when I met a family flying from Auckland to London. They were trying to fly from Auckland to London. They had gotten to Los Angeles, where they were supposed to get a direct flight to London Heathrow. But that flight got canceled and they had to get another itinerary, which they thought, was routed through Florida. Imagine their surprise when they wound up next to lake Michigan.
ORD Stands for Orchard: A History of Airport Codes