| Merthyr Tudful to Cockermouth | 201.64 mi (324.50 km) |
| Merthyr Tudful to Colchester | 183.11 mi (294.69 km) |
| Merthyr Tudful to Coleford | 32.74 mi (52.69 km) |
| Merthyr Tudful to Colne | 154.35 mi (248.40 km) |
| Merthyr Tudful to Colwyn Bay | 107.74 mi (173.39 km) |
| Merthyr Tudful to Congleton | 109.55 mi (176.31 km) |
| Merthyr Tudful to Conisbrough | 150.09 mi (241.55 km) |
| Merthyr Tudful to Connahs Quay | 102.80 mi (165.45 km) |
| Merthyr Tudful to Consett | 223.97 mi (360.45 km) |
| Merthyr Tudful to Conwy | 107.88 mi (173.62 km) |
| Merthyr Tudful to Cookstown | 244.24 mi (393.07 km) |
| Merthyr Tudful to Corby | 124.67 mi (200.64 km) |
| Merthyr Tudful to Corfe Mullen | 89.33 mi (143.75 km) |
| Merthyr Tudful to Corsham | 55.48 mi (89.29 km) |
| Merthyr Tudful to Coseley | 78.25 mi (125.93 km) |
