| Keystone to Marietta (Georgia) | 418.35 mi (673.27 km) |
| Keystone to Marietta (Ohio) | 783.05 mi (1,260.20 km) |
| Keystone to Marina (California) | 2,343.75 mi (3,771.90 km) |
| Keystone to Marinette (Wisconsin) | 1,203.71 mi (1,937.18 km) |
| Keystone to Marion (Arkansas) | 661.97 mi (1,065.34 km) |
| Keystone to Marion (Illinois) | 758.14 mi (1,220.10 km) |
| Keystone to Marion (Indiana) | 875.45 mi (1,408.91 km) |
| Keystone to Marion (Iowa) | 1,085.79 mi (1,747.40 km) |
| Keystone to Marion (Ohio) | 861.84 mi (1,386.99 km) |
| Keystone to Marion Oaks (Florida) | 64.93 mi (104.49 km) |
| Keystone to Markham (Illinois) | 973.83 mi (1,567.23 km) |
| Keystone to Marlborough (Massachusetts) | 1,161.34 mi (1,869.00 km) |
| Keystone to Marlton (New Jersey) | 923.38 mi (1,486.04 km) |
| Keystone to Marquette (Michigan) | 1,298.69 mi (2,090.04 km) |
| Keystone to Marrero (Louisiana) | 469.78 mi (756.04 km) |
