What airport code corresponds to the city of Chicago?

The airport code that corresponds to the city of Chicago is ORD, which stands for O'Hare International Airport. This airport is one of the busiest in the United States and serves as a major hub for domestic and international flights. The code "ORD" is derived from the airport's original name, Orchard Field, and has been used officially since the 1930s.

Other airport codes provided relate to different cities. For instance, PBI is the code for Palm Beach International Airport in Florida, MSP corresponds to Minneapolis-Saint Paul International Airport in Minnesota, and DTW is the code for Detroit Metropolitan Wayne County Airport in Michigan. Each of these codes is unique to its respective airport and helps travelers identify their destinations accurately.