4. Dallas/Fort Worth International Airport

is the primary international airport serving the Dallas–Fort Worth area in the U.S. state of Texas; In 2015, DFW served a record number 64,174,163 passengers.

It is the third busiest airport in the world by aircraft movements and the tenth busiest airport in the world by passenger traffic in 2015. With nearly 900 daily flights, American Airlines at DFW is the second largest airline hub in the world and the United States, only behind Delta's Atlanta hub.