| Merthyr Tudful to Cognac | 440.23 mi (708.47 km) |
| Merthyr Tudful to Cogolin | 745.64 mi (1,199.99 km) |
| Merthyr Tudful to Colmar | 539.70 mi (868.56 km) |
| Merthyr Tudful to Colombes | 315.45 mi (507.67 km) |
| Merthyr Tudful to Colomiers | 602.65 mi (969.87 km) |
| Merthyr Tudful to Combs-la-Ville | 337.50 mi (543.16 km) |
| Merthyr Tudful to Comines | 284.26 mi (457.48 km) |
| Merthyr Tudful to Compiegne | 315.91 mi (508.41 km) |
| Merthyr Tudful to Concarneau | 268.32 mi (431.81 km) |
| Merthyr Tudful to Conde-sur-l'Escaut | 315.17 mi (507.22 km) |
| Merthyr Tudful to Conflans-Sainte-Honorine | 306.75 mi (493.67 km) |
| Merthyr Tudful to Corbas | 563.84 mi (907.42 km) |
| Merthyr Tudful to Corbeil-Essonnes | 337.42 mi (543.02 km) |
| Merthyr Tudful to Cormeilles-en-Parisis | 311.45 mi (501.23 km) |
| Merthyr Tudful to Cosne sur Loire | 411.24 mi (661.83 km) |
