6. O’Hare International Airport
Number of passengers: 78,327,479
O’Hare International Airport is located on the Northwest Side of Chicago, Illinois, and it is one of the major international airports in the country. The airport primarily serves the Chicago metropolitan area, but is in a prime location for layovers as it sits in the center of the United States. Last year, it served an astonishing 78 million people, which makes it one of the biggest airports in the entire world.
Tupungato/Shutterstock.com
