Chicago is 2,732 times larger than Phoenix, Arizona.
Area: 608 km2 calculated
Chicago is the third most populous city in the United States, after New York City and Los Angeles. With 2.7 million residents, it is the most populous city in both the U.S. state of Illinois and the American Midwest. Wikipedia
Area: 0 km2 calculated
Phoenix is the capital, and largest city, of the State of Arizona. With 1,445,632 people, Phoenix is the most populous state capital in the United States, as well as the sixth most populous city nationally, after New York, Los Angeles, Chicago, Houston, and Philadelphia. Wikipedia