https://airport-codes-data.pages.dev/blog/ Guides and explainers from US Airport Codes Database en-us https://airport-codes-data.pages.dev/blog/how-airport-codes-assigned https://airport-codes-data.pages.dev/blog/how-airport-codes-assigned Why is Chicago O'Hare ORD and Orlando MCO? How IATA airport codes are assigned, why the obvious letters are often taken, and the stories behind the strangest 3-letter codes in the US. Thu, 01 Oct 2026 19:05:38 GMT https://airport-codes-data.pages.dev/blog/iata-vs-icao-codes https://airport-codes-data.pages.dev/blog/iata-vs-icao-codes IATA codes are 3 letters for tickets and bags; ICAO codes are 4 letters for pilots and air traffic control. Learn the difference, the K-prefix rule, and why you should never convert one to the other. Thu, 01 Oct 2026 19:05:38 GMT