| Keystone to Manor (Texas) | 911.99 mi (1,467.70 km) |
| Keystone to Manorville (New York) | 1,040.09 mi (1,673.86 km) |
| Keystone to Mansfield (Ohio) | 872.96 mi (1,404.90 km) |
| Keystone to Mansfield (Texas) | 917.54 mi (1,476.64 km) |
| Keystone to Manteca (California) | 2,318.39 mi (3,731.09 km) |
| Keystone to Manville (New Jersey) | 970.63 mi (1,562.07 km) |
| Keystone to Maple Grove (Minnesota) | 1,315.84 mi (2,117.64 km) |
| Keystone to Maple Heights (Ohio) | 919.30 mi (1,479.47 km) |
| Keystone to Maple Valley (Washington) | 2,492.95 mi (4,012.02 km) |
| Keystone to Mapleton (Utah) | 1,841.14 mi (2,963.02 km) |
| Keystone to Maplewood (Minnesota) | 1,297.65 mi (2,088.36 km) |
| Keystone to Marana (Arizona) | 1,724.25 mi (2,774.91 km) |
| Keystone to Marco Island (Florida) | 161.68 mi (260.19 km) |
| Keystone to Margate (Florida) | 196.19 mi (315.74 km) |
| Keystone to Maricopa (Arizona) | 1,775.33 mi (2,857.12 km) |
