What are some common airport and country codes?
Top 30 Country Codes (by population)
Top 30 Airport Codes (busiest airports)
| Hartsfield-Jackson Atlanta International | Atlanta, Georgia, USA | ATL |
| Beijing Capital International Airport | Beijing, China | PEK |
| Los Angeles International Airport | Los Angeles, California, USA | LAX |
| Tokyo Haneda Airport | Tokyo, Japan | HND |
| Dubai International Airport | Dubai, UAE | DXB |
| O'Hare International Airport | Chicago, Illinois, USA | ORD |
| London Heathrow Airport | London, UK | LHR |
| Shanghai Pudong International Airport | Pudong, Shanghai, China | PVG |
| Charles de Gaulle Airport | Île-de-France, France | CDG |
| Dallas / Fort Worth International Airport | Dallas-Fort Worth, Texas, USA | DFW |
| Guangzhou Baiyun International Airport | Guangdong, China | CAN |
| Amsterdam Airport Schiphol | North Holland, Netherlands | AMS |
| Hong Kong International Airport | Hong Kong, China | HKG |
| Frankfurt Airport | Frankfurt, Germany | FRA |
| Denver International Airport | Denver, Colorado, USA | DEN |
| Seoul Incheon International Airport | Incheon, South Korea | ICN |
| Singapore Changi Airport | Changi, Singapore | SIN |
| Indira Gandhi International Airport | Delhi, India | DEL |
| Suvarnabhumi Airport | Samut Prakan, Thailand | BKK |
| Soekarno-Hatta International Airport | Banten, Indonesia | CGK |
| John F. Kennedy International Airport | Queens, New York, USA | JFK |
| Kuala Lumpur International Airport | Selangor, Malaysia | KUL |
| Madrid Barajas Airport | Barajas, Madrid, Spain | MAD |
| San Francisco International Airport | San Mateo County, California, USA | SFO |
| Chengdu Shuangliu International Airport | Chengdu, Sichuan, China | CTU |
| Shenzen Bao'an International Airport | Shenzen, Guangdong, China | SZX |
| Barcelona - El Prat Airport | Barcelona, Spain | BCN |
| Istanbul Airport | Istanbul, Turkey | IST |
| Seattle-Tacoma International Airport | SeaTac, Washington, USA | SEA |
| McCarran International Airport | Las Vegas, Nevada, USA | LAS |