| Rock Hill to Mattoon (Illinois) | 510.85 mi (822.13 km) |
| Rock Hill to Mauldin (South Carolina) | 73.35 mi (118.04 km) |
| Rock Hill to Maumee (Ohio) | 479.76 mi (772.09 km) |
| Rock Hill to Maumelle (Arkansas) | 644.34 mi (1,036.97 km) |
| Rock Hill to Mayagüez (Puerto Rico) | 1,436.73 mi (2,312.19 km) |
| Rock Hill to Mayfield Heights (Ohio) | 454.95 mi (732.16 km) |
| Rock Hill to Mays Chapel (Maryland) | 392.68 mi (631.96 km) |
| Rock Hill to Maywood (California) | 2,105.80 mi (3,388.96 km) |
| Rock Hill to Maywood (Illinois) | 604.66 mi (973.10 km) |
| Rock Hill to McAlester (Oklahoma) | 834.70 mi (1,343.32 km) |
| Rock Hill to McAllen (Texas) | 1,185.72 mi (1,908.23 km) |
| Rock Hill to McCalla (Alabama) | 361.65 mi (582.03 km) |
| Rock Hill to McComb (Mississippi) | 603.23 mi (970.81 km) |
| Rock Hill to McDonough (Georgia) | 206.61 mi (332.50 km) |
| Rock Hill to McFarland (California) | 2,141.64 mi (3,446.63 km) |
