List of Top 30 US Airlines Name & Airline Codes
| Rank | City | Airports | State | IATA Code |
| 1 | Atlanta | Hartsfield–Jackson Atlanta International Airport | GA | ATL |
| 2 | Los Angeles | Los Angeles International Airport | CA | LAX |
| 3 | Chicago | O’Hare International Airport | IL | ORD |
| 4 | Dallas/Fort Worth | Dallas/Fort Worth International Airport | TX | DFW |
| 5 | Denver | Denver International Airport | CO | DEN |
| 6 | New York | John F. Kennedy International Airport | NY | JFK |
| 7 | San Francisco | San Francisco International Airport | CA | SFO |
| 8 | Seattle/Tacoma | Seattle–Tacoma International Airport | WA | SEA |
| 9 | Las Vegas | McCarran International Airport | NV | LAS |
| 10 | Orlando | Orlando International Airport | FL | MCO |
| 11 | New York/Newark | Newark Liberty International Airport | NJ | EWR |
| 12 | Charlotte | Charlotte Douglas International Airport | NC | CLT |
| 13 | Phoenix | Phoenix Sky Harbor International Airport | AZ | PHX |
| 14 | Houston | George Bush Intercontinental Airport | TX | IAH |
| 15 | Miami | Miami International Airport | FL | MIA |
| 16 | Boston | Logan International Airport | MA | BOS |
| 17 | Minneapolis/St. Paul | Minneapolis–Saint Paul International Airport | MN | MSP |
| 18 | Fort Lauderdale | Fort Lauderdale–Hollywood International Airport | FL | FLL |
| 19 | Detroit | Detroit Metropolitan Airport | MI | DTW |
| 20 | Philadelphia | Philadelphia International Airport | PA | PHL |
| 21 | New York | LaGuardia Airport | NY | LGA |
| 22 | Baltimore/Washington, D.C. | Baltimore–Washington International Airport | MD | BWI |
| 23 | Salt Lake City | Salt Lake City International Airport | UT | SLC |
| 24 | San Diego | San Diego International Airport | CA | SAN |
| 25 | Washington, D.C. | Washington Dulles International Airport | VA | IAD |
| 26 | Washington, D.C. | Ronald Reagan Washington National Airport | VA | DCA |
| 27 | Chicago | Midway International Airport | IL | MDW |
| 28 | Tampa | Tampa International Airport | FL | TPA |
| 29 | Portland | Portland International Airport | OR | PDX |
| 30 | Honolulu | Daniel K. Inouye International Airport | HI | HNL |
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List of Top International Airlines Airline Codes.
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