| Keystone to Clacton-on-Sea | 4,459.17 mi (7,176.33 km) |
| Keystone to Clay Cross | 4,333.43 mi (6,973.98 km) |
| Keystone to Clayton | 4,309.09 mi (6,934.81 km) |
| Keystone to Clayton le Moors | 4,286.28 mi (6,898.10 km) |
| Keystone to Cleckheaton | 4,313.62 mi (6,942.10 km) |
| Keystone to Cleethorpes | 4,384.12 mi (7,055.56 km) |
| Keystone to Clevedon | 4,296.94 mi (6,915.26 km) |
| Keystone to Clifton | 4,346.60 mi (6,995.18 km) |
| Keystone to Clifton | 4,335.22 mi (6,976.86 km) |
| Keystone to Cliftonville | 4,476.71 mi (7,204.57 km) |
| Keystone to Clitheroe | 4,284.79 mi (6,895.70 km) |
| Keystone to Clydebank | 4,184.19 mi (6,733.80 km) |
| Keystone to Coalville | 4,341.25 mi (6,986.57 km) |
| Keystone to Coatbridge | 4,198.90 mi (6,757.47 km) |
| Keystone to Cobham | 4,401.62 mi (7,083.72 km) |
