Which city does the airport code SDF refer to?

The airport code SDF refers to Louisville International Airport, located in Louisville, Kentucky. In the context of airport codes, each code is unique to a specific location and is used primarily for identifying airports in a concise manner. Louisville International Airport serves as a significant hub for both passenger flights and cargo operations, particularly due to the presence of UPS's Worldport facility.

Understanding airport codes is crucial for flight attendants, as they need to be familiar with the destinations they serve and the corresponding codes for efficient communication and operational tasks. Other options listed, while they may correspond to actual airports, do not use the SDF code. For example, Knoxville, Tennessee has a different airport code (TYS), Fort Myers, Florida is served by RSW, and Calgary, Canada is represented by YYC. Thus, knowing that SDF specifically stands for Louisville helps clarify which city is associated with that particular code.