| Keystone to Channelview (Texas) | 764.79 mi (1,230.80 km) |
| Keystone to Chantilly (Virginia) | 799.89 mi (1,287.30 km) |
| Keystone to Chaparral (New Mexico) | 1,445.56 mi (2,326.40 km) |
| Keystone to Chapel Hill (North Carolina) | 577.49 mi (929.38 km) |
| Keystone to Charleston (Illinois) | 846.79 mi (1,362.78 km) |
| Keystone to Charleston (South Carolina) | 359.63 mi (578.76 km) |
| Keystone to Charleston (West Virginia) | 708.14 mi (1,139.64 km) |
| Keystone to Charlotte (North Carolina) | 499.90 mi (804.51 km) |
| Keystone to Charlottesville (Virginia) | 724.49 mi (1,165.96 km) |
| Keystone to Chaska (Minnesota) | 1,302.21 mi (2,095.70 km) |
| Keystone to Chatham (Illinois) | 894.47 mi (1,439.50 km) |
| Keystone to Chattanooga (Tennessee) | 503.79 mi (810.77 km) |
| Keystone to Cheat Lake (West Virginia) | 812.30 mi (1,307.28 km) |
| Keystone to Chelsea (Alabama) | 431.33 mi (694.15 km) |
| Keystone to Chelsea (Massachusetts) | 1,179.51 mi (1,898.24 km) |
