| Merthyr Tudful to Cromer | 213.90 mi (344.23 km) |
| Merthyr Tudful to Crosby | 121.37 mi (195.33 km) |
| Merthyr Tudful to Crowborough | 159.62 mi (256.88 km) |
| Merthyr Tudful to Croxley Green | 125.78 mi (202.42 km) |
| Merthyr Tudful to Croydon | 142.69 mi (229.63 km) |
| Merthyr Tudful to Cudworth | 151.15 mi (243.25 km) |
| Merthyr Tudful to Culcheth | 123.40 mi (198.60 km) |
| Merthyr Tudful to Cullercoats | 241.01 mi (387.86 km) |
| Merthyr Tudful to Cumbernauld | 291.41 mi (468.98 km) |
| Merthyr Tudful to Cumnock | 258.88 mi (416.63 km) |
| Merthyr Tudful to Cupar | 316.59 mi (509.50 km) |
| Merthyr Tudful to Cwmbran | 16.50 mi (26.56 km) |
| Merthyr Tudful to Dagenham | 151.58 mi (243.94 km) |
| Merthyr Tudful to Dalkeith | 287.23 mi (462.25 km) |
| Merthyr Tudful to Darfield | 149.62 mi (240.79 km) |
