| Rock Hill to Maryland Heights (Missouri) | 583.78 mi (939.51 km) |
| Rock Hill to Marysville (California) | 2,236.86 mi (3,599.88 km) |
| Rock Hill to Marysville (Ohio) | 386.95 mi (622.73 km) |
| Rock Hill to Marysville (Washington) | 2,280.17 mi (3,669.58 km) |
| Rock Hill to Maryville (Missouri) | 843.15 mi (1,356.92 km) |
| Rock Hill to Maryville (Tennessee) | 175.57 mi (282.55 km) |
| Rock Hill to Mason (Ohio) | 354.44 mi (570.41 km) |
| Rock Hill to Mason City (Iowa) | 863.50 mi (1,389.66 km) |
| Rock Hill to Massapequa (New York) | 571.03 mi (918.98 km) |
| Rock Hill to Massapequa Park (New York) | 572.50 mi (921.35 km) |
| Rock Hill to Massillon (Ohio) | 404.59 mi (651.12 km) |
| Rock Hill to Mastic (New York) | 602.17 mi (969.10 km) |
| Rock Hill to Mastic Beach (New York) | 600.72 mi (966.76 km) |
| Rock Hill to Matteson (Illinois) | 581.90 mi (936.49 km) |
| Rock Hill to Matthews (North Carolina) | 21.61 mi (34.77 km) |
