| Merthyr Tudful to Caldicot | 28.92 mi (46.54 km) |
| Merthyr Tudful to Calne | 62.59 mi (100.73 km) |
| Merthyr Tudful to Cam | 43.49 mi (69.99 km) |
| Merthyr Tudful to Camberley | 116.73 mi (187.86 km) |
| Merthyr Tudful to Camborne | 134.77 mi (216.89 km) |
| Merthyr Tudful to Cambridge | 152.22 mi (244.98 km) |
| Merthyr Tudful to Cambuslang | 283.46 mi (456.18 km) |
| Merthyr Tudful to Canford Cliffs | 95.49 mi (153.68 km) |
| Merthyr Tudful to Cannock | 86.95 mi (139.93 km) |
| Merthyr Tudful to Canterbury | 194.32 mi (312.72 km) |
| Merthyr Tudful to Carlisle | 218.24 mi (351.22 km) |
| Merthyr Tudful to Carlton Colville | 220.64 mi (355.08 km) |
| Merthyr Tudful to Carluke | 276.38 mi (444.79 km) |
| Merthyr Tudful to Carnoustie | 329.85 mi (530.85 km) |
| Merthyr Tudful to Carshalton | 140.36 mi (225.88 km) |
