Harrisburg International Airport and Tucson International Airport, are which classification of airports?
Harrisburg International Airport Harrisburg International Airport (IATA: MDT, ICAO: KMDT, FAA LID: MDT) is a public airport in Lower Swatara Township, Pennsylvania, nine miles (15 km) southeast of Harrisburg. It is owned by the Susquehanna Area Regional Airport Authority.
Greenville–Spartanburg International Airport Greenville–Spartanburg International Airport (IATA: GSP, ICAO: KGSP, FAA LID: GSP) (Roger Milliken Field) is near Greer, South Carolina, midway between Greenville and Spartanburg, the major cities of the Upstate region. The airport is the second-busiest airport in South Carolina, after Charleston International Airport, with about 2.02 million passengers in 2016.