Airport Code
A standardized three-letter identifier assigned to airports worldwide by the International Air Transport Association (IATA) for use in ticketing, scheduling, and aviation communications.
An airport code is a unique three-letter alphanumeric designation used to identify individual airports across the globe. Developed and maintained by the International Air Transport Association (IATA), these codes serve as a universal shorthand in airline ticketing systems, flight schedules, baggage tags, and boarding passes. They eliminate ambiguity when referencing airports in both passenger-facing and back-end aviation operations, making them an essential component of modern air travel infrastructure.
Why it matters
Airport codes are the primary reference point for routing, pricing, and data analysis in managed travel. Misreading a code — confusing LON (any London airport) with LHR (Heathrow only) or LGW (Gatwick), for example — can lead to travellers arriving at the wrong terminal or even the wrong airport in the same city. Travel reports that aggregate spend by airport code give managers a clear picture of which hubs carry the highest volume and cost.
How it works in practice
When a booking is made, the itinerary records airport codes for every origin, destination, and connection point. Baggage tags use these codes to route luggage through the network. In expense and BI reporting, airport codes serve as the foundation for route-level analysis, carrier-by-route performance tracking, and duty-of-care location data during travel disruptions.
The takeaway
Familiarize travellers and booking tools with city codes versus airport codes, particularly in multi-airport cities like London (LHR, LGW, LCY, STN, LTN), New York (JFK, LGA, EWR), and Paris (CDG, ORY). Clarifying the distinction at the time of booking prevents costly mistakes and guarantees baggage is routed correctly.