| Harrow Weald to Caldicot | 103.44 mi (166.48 km) |
| Harrow Weald to Calne | 72.54 mi (116.73 km) |
| Harrow Weald to Cam | 87.07 mi (140.13 km) |
| Harrow Weald to Camberley | 25.42 mi (40.91 km) |
| Harrow Weald to Camborne | 236.48 mi (380.58 km) |
| Harrow Weald to Cambridge | 45.91 mi (73.88 km) |
| Harrow Weald to Cambuslang | 330.52 mi (531.91 km) |
| Harrow Weald to Canford Cliffs | 93.03 mi (149.72 km) |
| Harrow Weald to Cannock | 103.74 mi (166.95 km) |
| Harrow Weald to Canterbury | 65.08 mi (104.74 km) |
| Harrow Weald to Carlisle | 251.31 mi (404.44 km) |
| Harrow Weald to Carlton Colville | 104.38 mi (167.98 km) |
| Harrow Weald to Carluke | 319.11 mi (513.56 km) |
| Harrow Weald to Carnoustie | 351.70 mi (566.00 km) |
| Harrow Weald to Carshalton | 18.07 mi (29.09 km) |
