Tupelo airport is represented by which identifier?

The identifier for Tupelo Airport is KTUP. ICAO airport codes consist of a two-letter region code and a three-letter airport code, specifically designed to provide a unique identification for each airport. In this case, "KT" represents the region of the United States, while "UP" identifies Tupelo Airport specifically.

The other identifiers, while valid airport codes, refer to different locations. KSTF is the identifier for a different airport, KTUL represents Tulsa International Airport, and KTPA is the identifier for Tampa International Airport. This highlights the unique nature of the ICAO system where every airport is assigned a distinct code, making KTUP the correct choice for Tupelo Airport.