| Merthyr Tudful to Cavaillon | 670.60 mi (1,079.23 km) |
| Merthyr Tudful to Cebazat | 503.35 mi (810.07 km) |
| Merthyr Tudful to Cenon | 493.28 mi (793.86 km) |
| Merthyr Tudful to Cergy | 303.89 mi (489.06 km) |
| Merthyr Tudful to Cernay | 543.05 mi (873.96 km) |
| Merthyr Tudful to Cesson | 343.69 mi (553.11 km) |
| Merthyr Tudful to Cesson-Sevigne | 262.40 mi (422.29 km) |
| Merthyr Tudful to Cestas | 499.12 mi (803.26 km) |
| Merthyr Tudful to Chalette-sur-Loing | 374.69 mi (603.00 km) |
| Merthyr Tudful to Challans | 344.97 mi (555.17 km) |
| Merthyr Tudful to Chalon-sur-Saone | 504.70 mi (812.24 km) |
| Merthyr Tudful to Chalons-en-Champagne | 391.60 mi (630.21 km) |
| Merthyr Tudful to Chamalieres | 505.82 mi (814.04 km) |
| Merthyr Tudful to Chambery | 600.51 mi (966.43 km) |
| Merthyr Tudful to Chambly | 304.72 mi (490.40 km) |
