| Keystone to Chicago Ridge (Illinois) | 982.07 mi (1,580.50 km) |
| Keystone to Chickasha (Oklahoma) | 1,020.02 mi (1,641.56 km) |
| Keystone to Chico (California) | 2,365.06 mi (3,806.20 km) |
| Keystone to Chicopee (Massachusetts) | 1,121.77 mi (1,805.31 km) |
| Keystone to Chillicothe (Ohio) | 774.73 mi (1,246.81 km) |
| Keystone to Chillum (Maryland) | 815.16 mi (1,311.88 km) |
| Keystone to Chino (California) | 2,103.95 mi (3,385.98 km) |
| Keystone to Chino Hills (California) | 2,107.34 mi (3,391.43 km) |
| Keystone to Chino Valley (Arizona) | 1,808.65 mi (2,910.75 km) |
| Keystone to Chippewa Falls (Wisconsin) | 1,257.60 mi (2,023.92 km) |
| Keystone to Choctaw (Oklahoma) | 998.09 mi (1,606.26 km) |
| Keystone to Chowchilla (California) | 2,260.11 mi (3,637.29 km) |
| Keystone to Christiansburg (Virginia) | 635.41 mi (1,022.60 km) |
| Keystone to Chubbuck (Idaho) | 1,950.07 mi (3,138.34 km) |
| Keystone to Chula Vista (California) | 2,065.65 mi (3,324.34 km) |
