| Keystone to Medford (New York) | 1,032.24 mi (1,661.23 km) |
| Keystone to Medford (Oregon) | 2,446.45 mi (3,937.19 km) |
| Keystone to Medina (Ohio) | 899.48 mi (1,447.57 km) |
| Keystone to Medulla (Florida) | 39.29 mi (63.23 km) |
| Keystone to Mehlville (Missouri) | 842.92 mi (1,356.55 km) |
| Keystone to Melbourne (Florida) | 118.06 mi (190.00 km) |
| Keystone to Melissa (Texas) | 901.44 mi (1,450.73 km) |
| Keystone to Melrose (Massachusetts) | 1,182.00 mi (1,902.24 km) |
| Keystone to Melrose Park (Illinois) | 996.53 mi (1,603.75 km) |
| Keystone to Melville (New York) | 1,017.53 mi (1,637.56 km) |
| Keystone to Melvindale (Michigan) | 978.14 mi (1,574.16 km) |
| Keystone to Memphis (Florida) | 40.68 mi (65.46 km) |
| Keystone to Memphis (Tennessee) | 647.84 mi (1,042.60 km) |
| Keystone to Menasha (Wisconsin) | 1,156.87 mi (1,861.81 km) |
| Keystone to Mendota (California) | 2,266.05 mi (3,646.86 km) |
