Which city is represented by the code TUL?

The city represented by the code TUL is Tulsa, which is located in Oklahoma. City codes, often derived from the International Civil Aviation Organization (ICAO) or the International Air Transport Association (IATA), are commonly used in the airline industry to uniquely identify airports. For Tulsa, the airport is Tulsa International Airport, and TUL is the designated code that reflects the city's name.

The other options do not correspond to the correct city code. Tucson has the airport code TUS, Tampa is represented by TPA, and Reno is identified by RNO. Each city has a unique code that does not overlap with TUL, making Tulsa the correct and singular answer.