| Merthyr Tudful to Cosham | 117.68 mi (189.39 km) |
| Merthyr Tudful to Costessey | 204.56 mi (329.21 km) |
| Merthyr Tudful to Cottingham | 187.62 mi (301.94 km) |
| Merthyr Tudful to Coulsdon | 142.24 mi (228.91 km) |
| Merthyr Tudful to Coventry | 91.65 mi (147.50 km) |
| Merthyr Tudful to Cowdenbeath | 301.73 mi (485.59 km) |
| Merthyr Tudful to Cowes | 112.65 mi (181.29 km) |
| Merthyr Tudful to Cowley | 125.11 mi (201.35 km) |
| Merthyr Tudful to Cowley | 92.55 mi (148.94 km) |
| Merthyr Tudful to Cramlington | 242.21 mi (389.80 km) |
| Merthyr Tudful to Cranleigh | 131.72 mi (211.98 km) |
| Merthyr Tudful to Crawley | 144.26 mi (232.16 km) |
| Merthyr Tudful to Crayford | 154.09 mi (247.99 km) |
| Merthyr Tudful to Crewe | 101.68 mi (163.64 km) |
| Merthyr Tudful to Crigglestone | 152.59 mi (245.58 km) |
