What is the airport code for Louisville, Kentucky?

The airport code for Louisville, Kentucky, is indeed SDF. This code stands for Louisville Muhammad Ali International Airport, which is the main airport serving the city. The code is derived from the airport's previous name, Standiford Field.

Airport codes are essential for identifying specific airports, particularly in the aviation industry, and SDF is recognized internationally. The other options listed do not correspond to Louisville's airport; for example, TYS refers to McGhee Tyson Airport in Tennessee, while AA and AF are not valid airport codes representing any specific location in this context. Understanding these codes is critical for flight attendants, as they facilitate communication and operations within airports.