| Keystone to Cedar Park (Texas) | 930.72 mi (1,497.86 km) |
| Keystone to Cedar Rapids (Iowa) | 1,083.55 mi (1,743.81 km) |
| Keystone to Cedarburg (Wisconsin) | 1,090.09 mi (1,754.33 km) |
| Keystone to Celebration (Florida) | 65.04 mi (104.68 km) |
| Keystone to Celina (Ohio) | 865.60 mi (1,393.06 km) |
| Keystone to Celina (Texas) | 914.94 mi (1,472.46 km) |
| Keystone to Centennial (Colorado) | 1,496.67 mi (2,408.65 km) |
| Keystone to Center Point (Alabama) | 451.33 mi (726.34 km) |
| Keystone to Centereach (New York) | 1,032.00 mi (1,660.85 km) |
| Keystone to Centerton (Arkansas) | 887.70 mi (1,428.62 km) |
| Keystone to Centerville (Ohio) | 799.65 mi (1,286.91 km) |
| Keystone to Centerville (Utah) | 1,874.20 mi (3,016.24 km) |
| Keystone to Central (Louisiana) | 534.94 mi (860.91 km) |
| Keystone to Central Falls (Rhode Island) | 1,140.48 mi (1,835.43 km) |
| Keystone to Central Islip (New York) | 1,023.87 mi (1,647.76 km) |
