AirportsLearn about airports
Short guides in plain language.
IATA and ICAO airport codes
Airports have two codes. Learn what the three-letter IATA code and the four-letter ICAO code are for, who uses each, and how the letters are chosen.
How runway numbers work
Runway numbers are compass directions. Learn how to read names like 09/27 and 10L/28R, why a runway has two numbers, and why the numbers sometimes change.
Kinds of airports
What is meant by a large, medium or small airport, an international airport, a hub, a seaplane base and a heliport, and what scheduled service means.