| Oak Ridge to Caldicot | 3,987.75 mi (6,417.66 km) |
| Oak Ridge to Calne | 4,021.44 mi (6,471.89 km) |
| Oak Ridge to Cam | 4,000.91 mi (6,438.85 km) |
| Oak Ridge to Camberley | 4,075.10 mi (6,558.24 km) |
| Oak Ridge to Camborne | 3,912.18 mi (6,296.04 km) |
| Oak Ridge to Cambridge | 4,088.85 mi (6,580.37 km) |
| Oak Ridge to Cambuslang | 3,847.16 mi (6,191.41 km) |
| Oak Ridge to Canford Cliffs | 4,041.58 mi (6,504.30 km) |
| Oak Ridge to Cannock | 3,992.46 mi (6,425.24 km) |
| Oak Ridge to Canterbury | 4,150.01 mi (6,678.80 km) |
| Oak Ridge to Carlisle | 3,910.88 mi (6,293.95 km) |
| Oak Ridge to Carlton Colville | 4,144.84 mi (6,670.47 km) |
| Oak Ridge to Carluke | 3,861.20 mi (6,213.99 km) |
| Oak Ridge to Carnoustie | 3,888.69 mi (6,258.25 km) |
| Oak Ridge to Carshalton | 4,097.61 mi (6,594.47 km) |
