| Oak Ridge to Clacton-on-Sea | 4,139.80 mi (6,662.36 km) |
| Oak Ridge to Clay Cross | 4,006.27 mi (6,447.46 km) |
| Oak Ridge to Clayton | 3,977.16 mi (6,400.62 km) |
| Oak Ridge to Clayton le Moors | 3,955.14 mi (6,365.18 km) |
| Oak Ridge to Cleckheaton | 3,982.05 mi (6,408.50 km) |
| Oak Ridge to Cleethorpes | 4,051.70 mi (6,520.59 km) |
| Oak Ridge to Clevedon | 3,986.88 mi (6,416.26 km) |
| Oak Ridge to Clifton | 4,021.34 mi (6,471.72 km) |
| Oak Ridge to Clifton | 4,000.73 mi (6,438.56 km) |
| Oak Ridge to Cliftonville | 4,160.32 mi (6,695.38 km) |
| Oak Ridge to Clitheroe | 3,952.83 mi (6,361.47 km) |
| Oak Ridge to Clydebank | 3,836.97 mi (6,175.01 km) |
| Oak Ridge to Coalville | 4,017.80 mi (6,466.03 km) |
| Oak Ridge to Coatbridge | 3,851.64 mi (6,198.61 km) |
| Oak Ridge to Cobham | 4,088.73 mi (6,580.17 km) |
