Downtown Charlotte to Tega Cay or Fort Mill is approx 18.9 miles or 23 minutes drive time. If you live in Tega Cay or Fort Mill and work in south Charlotte near Westinghouse and Interstate 77 the distance is 8 miles and 11 minutes Drive time. Headed further south on Interstate 77 is Rock Hill South Carolina which is 6 miles and 8 minutes drive time from downtown Fort Mill.