| Merthyr Tudful to Clacton-on-Sea | 193.43 mi (311.29 km) |
| Merthyr Tudful to Clay Cross | 128.37 mi (206.60 km) |
| Merthyr Tudful to Clayton | 155.32 mi (249.96 km) |
| Merthyr Tudful to Clayton le Moors | 146.42 mi (235.63 km) |
| Merthyr Tudful to Cleckheaton | 153.52 mi (247.06 km) |
| Merthyr Tudful to Cleethorpes | 188.22 mi (302.92 km) |
| Merthyr Tudful to Clevedon | 30.82 mi (49.60 km) |
| Merthyr Tudful to Clifton | 122.77 mi (197.57 km) |
| Merthyr Tudful to Clifton | 181.00 mi (291.29 km) |
| Merthyr Tudful to Cliftonville | 206.83 mi (332.86 km) |
| Merthyr Tudful to Clitheroe | 152.70 mi (245.74 km) |
| Merthyr Tudful to Clydebank | 290.20 mi (467.04 km) |
| Merthyr Tudful to Coalville | 108.72 mi (174.97 km) |
| Merthyr Tudful to Coatbridge | 285.85 mi (460.04 km) |
| Merthyr Tudful to Cobham | 130.76 mi (210.43 km) |
