America's Busiest Airports

Number of passenger boardings in 2013
Hartsfield-Jackson Atlanta International45308407
Los Angeles International32425892
Chicago O'Hare International32317835
Dallas / Fort Worth International29038128
Denver International25496885
John F. Kennedy International25036358
San Francisco International21704626
Charlotte / Douglas International21346601
McCarran International19946179
Phoenix Sky Harbor International19525109
Sources: pewresearch.org