| Merthyr Tudful to Cortona | 922.28 mi (1,484.27 km) |
| Merthyr Tudful to Cosenza | 1,273.91 mi (2,050.16 km) |
| Merthyr Tudful to Cossato | 676.70 mi (1,089.04 km) |
| Merthyr Tudful to Costa Volpino | 735.30 mi (1,183.35 km) |
| Merthyr Tudful to Creazzo | 800.52 mi (1,288.32 km) |
| Merthyr Tudful to Crema | 740.44 mi (1,191.62 km) |
| Merthyr Tudful to Cremona | 763.87 mi (1,229.33 km) |
| Merthyr Tudful to Crevalcore | 823.89 mi (1,325.92 km) |
| Merthyr Tudful to Crispiano | 1,243.70 mi (2,001.55 km) |
| Merthyr Tudful to Crosia | 1,278.48 mi (2,057.51 km) |
| Merthyr Tudful to Crotone | 1,315.83 mi (2,117.62 km) |
| Merthyr Tudful to Cuneo | 714.93 mi (1,150.57 km) |
| Merthyr Tudful to Cuorgne | 667.25 mi (1,073.84 km) |
| Merthyr Tudful to Cusano Milanino | 713.87 mi (1,148.86 km) |
| Merthyr Tudful to Cutro | 1,313.67 mi (2,114.14 km) |
