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According to the 2011-2015 National Plan of Integrated Airport Systems (NPIAS), there are over 19,700 airports in the United States. 5,170 of these airports are open to the general public and 503 of them serve commercial flights.
A great deal of flights within the USA are domestic flights as North America is over 9,826,675 km² in total which would be a considerable amount of driving if you were to travel by car. This contributes to a large amount of air travel travellers through the popular and smaller airports.
These are the Top 40 busiest airports by passenger numbers in the US for 2016:
| Rank (2016) | Airports (large hubs) | IATA Code | Major city served | State | 2017 | 2016 | 2015 | 2014 |
|---|---|---|---|---|---|---|---|---|
| 1 | Hartsfield–Jackson Atlanta International Airport | ATL | Atlanta | GA | 51,916,451 | 50,476,272 | 49,340,732 | 46,604,273 |
| 2 | Los Angeles International Airport | LAX | Los Angeles | CA | 42,459,545 | 39,635,691 | 36,351,226 | 34,314,197 |
| 3 | O'Hare International Airport | ORD | Chicago | IL | 37,499,201 | 36,305,668 | 33,686,811 | |
| 4 | Dallas/Fort Worth International Airport | DFW | Dallas/Fort Worth | TX | 33,528,927 | 31,274,875 | 31,589,832 | 30,766,940 |
| 5 | John F. Kennedy International Airport | JFK | New York | NY | 29,224,554 | 27,717,503 | 26,244,928 | |
| 6 | Denver International Airport | DEN | Denver | CO | 30,714,011 | 28,246,269 | 26,280,043 | 26,000,591 |
| 7 | San Francisco International Airport | SFO | San Francisco | CA | 27,862,429 | 25,706,994 | 24,190,549 | 22,756,008 |
| 8 | McCarran International Airport | LAS | Las Vegas | NV | 24,248,814 | 22,665,289 | 21,824,231 | 20,551,016 |
| 9 | Charlotte Douglas International Airport | CLT | Charlotte | NC | 21,955,996 | 21,913,156 | 21,542,277 | |
| 10 | Seattle–Tacoma International Airport | SEA | Seattle/Tacoma | WA | 23,518,824 | 22,940,997 | 21,231,781 | 18,781,489 |
| 11 | Phoenix Sky Harbor International Airport | PHX | Phoenix | AZ | 22,016,714 | 20,896,229 | 21,351,445 | 20,344,867 |
| 12 | Miami International Airport | MIA | Miami | FL | 21,747,189 | 20,796,994 | 20,986,341 | 19,468,523 |
| 13 | Orlando International Airport | MCO | Orlando | FL | 22,215,929 | 20,283,479 | 18,759,938 | 17,278,608 |
| 14 | George Bush Intercontinental Airport | IAH | Houston | TX | 20,367,204 | 20,839,251 | 20,595,874 | 19,772,054 |
| 15 | Newark Liberty International Airport | EWR | Newark | NJ | 19,834,792 | 18,684,765 | 17,680,826 | |
| 16 | Minneapolis–Saint Paul International Airport | MSP | Minneapolis/St. Paul | MN | 19,002,544 | 18,109,982 | 17,634,252 | 16,972,678 |
| 17 | Logan International Airport | BOS | Boston | MA | 17,749,202 | 16,290,323 | 15,425,869 | |
| 18 | Detroit Metropolitan Airport | DTW | Detroit | MI | 16,826,287 | 16,255,507 | 15,775,941 | |
| 19 | Philadelphia International Airport | PHL | Philadelphia | PA | 14,760,585 | 14,521,408 | 15,101,318 | 14,747,112 |
| 20 | LaGuardia Airport | LGA | New York | NY | 14,706,123 | 14,319,924 | 13,415,797 | |
| 21 | Fort Lauderdale–Hollywood International Airport | FLL | Fort Lauderdale | FL | 16,216,686 | 14,263,202 | 13,061,607 | 11,987,607 |
| 22 | Baltimore–Washington International Airport | BWI | Baltimore/Washington, D.C. | MD | 13,214,185 | 12,340,183 | 11,738,828 | 11,022,200 |
| 23 | Ronald Reagan Washington National Airport | DCA | Washington, D.C. | VA | 11,966,354 | 11,372,460 | 11,242,375 | 10,057,794 |
| 24 | Salt Lake City International Airport | SLC | Salt Lake City | UT | 12,098,835 | 11,141,970 | 10,634,519 | 10,139,065 |
| 25 | Midway International Airport | MDW | Chicago | IL | 11,044,353 | 10,830,783 | 10,318,311 | |
| 26 | Washington Dulles International Airport | IAD | Washington, D.C. | VA | 11,407,107 | 10,596,883 | 10,363,918 | 10,415,948 |
| 27 | San Diego International Airport | SAN | San Diego | CA | 11,107,078 | 10,340,164 | 9,985,739 | 9,333,152 |
| 28 | Daniel K. Inouye International Airport | HNL | Honolulu | HI | 9,656,340 | 9,479,083 | 9,463,000 | |
| 29 | Tampa International Airport | TPA | Tampa | FL | 9,830,583 | 9,194,576 | 9,150,414 | 8,531,561 |
| 30 | Portland International Airport | PDX | Portland | OR | 9,538,472 | 9,071,154 | 8,340,234 | 7,878,760 |
The above tables show the number of passengers for the top 40 busiest airports by passengers in the United States for last year (2016) as well as the Year on Year change in the number of passengers between them.
Airport Information Index:
1. The busiest airport are ranked depending on the number of passengers flying to or from each airport.
2. Passenger may only be catching connecting flights from an airport to another destination.
3. Passenger Number data is related to the Airport Council International estimated full year figures for 2012.
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