机场代码
机场代码是分配给全球机场的唯一标识符，主要有两种形式：用于票务和行李处理等乘客服务的三个字母的IATA代码，以及用于空中交通管制和飞行计划的四个字母的ICAO代码。
机场代码类型
| 类型11 | Format | Used by | Example (London Heathrow) |
|---|---|---|---|
| IATA (International Air Transport Association) | Three-letter | Airlines, travel agents, public, baggage handling | LHR |
| IATA (International Air Transport Association) | Three-letter | Airlines, travel agents, public, baggage handling | LHR |
通用IATA代码
许多机场代码由城市或机场名称的前三个字母组成（例如，亚特兰大的ATL、波士顿的BOS、丹佛的DEN）。然而，也有许多例外：
| Airport Name | IATA Code | City / Location |
|---|---|---|
| Hartsfield–Jackson Atlanta International Airport | ATL | Atlanta, Georgia, USA |
| Hartsfield–Jackson Atlanta International Airport | ATL | Atlanta, Georgia, USA |
| Hartsfield–Jackson Atlanta International Airport | ATL | Atlanta, Georgia, USA |
| Hartsfield–Jackson Atlanta International Airport | ATL | Atlanta, Georgia, USA |
| Hartsfield–Jackson Atlanta International Airport | ATL | Atlanta, Georgia, USA |
| Hartsfield–Jackson Atlanta International Airport | ATL | Atlanta, Georgia, USA |
| Hartsfield–Jackson Atlanta International Airport | ATL | Atlanta, Georgia, USA |
| Hartsfield–Jackson Atlanta International Airport | ATL | Atlanta, Georgia, USA |
| Hartsfield–Jackson Atlanta International Airport | ATL | Atlanta, Georgia, USA |
| Hartsfield–Jackson Atlanta International Airport | ATL | Atlanta, Georgia, USA |
| Hartsfield–Jackson Atlanta International Airport | ATL | Atlanta, Georgia, USA |