| Keystone to Madison (New Jersey) | 988.11 mi (1,590.20 km) |
| Keystone to Madison (Wisconsin) | 1,100.26 mi (1,770.70 km) |
| Keystone to Madison Heights (Michigan) | 993.69 mi (1,599.19 km) |
| Keystone to Madison Heights (Virginia) | 674.86 mi (1,086.08 km) |
| Keystone to Madisonville (Kentucky) | 696.94 mi (1,121.62 km) |
| Keystone to Magalia (California) | 2,354.71 mi (3,789.54 km) |
| Keystone to Magna (Utah) | 1,884.20 mi (3,032.32 km) |
| Keystone to Magnolia (Arkansas) | 723.94 mi (1,165.07 km) |
| Keystone to Maili (Hawaii) | 4,689.29 mi (7,546.69 km) |
| Keystone to Maitland (Florida) | 82.21 mi (132.31 km) |
| Keystone to Makakilo (Hawaii) | 4,685.48 mi (7,540.55 km) |
| Keystone to Malden (Massachusetts) | 1,180.65 mi (1,900.08 km) |
| Keystone to Malibu (California) | 2,168.07 mi (3,489.18 km) |
| Keystone to Maltby (Washington) | 2,505.38 mi (4,032.02 km) |
| Keystone to Malvern (Arkansas) | 741.25 mi (1,192.93 km) |
