| Merthyr Tudful to Caltagirone | 1,327.67 mi (2,136.68 km) |
| Merthyr Tudful to Caltanissetta | 1,299.15 mi (2,090.77 km) |
| Merthyr Tudful to Calvisano | 765.63 mi (1,232.17 km) |
| Merthyr Tudful to Calvizzano | 1,118.74 mi (1,800.43 km) |
| Merthyr Tudful to Camaiore | 830.43 mi (1,336.44 km) |
| Merthyr Tudful to Cameri | 696.97 mi (1,121.67 km) |
| Merthyr Tudful to Camisano Vicentino | 810.17 mi (1,303.85 km) |
| Merthyr Tudful to Campagna | 1,162.97 mi (1,871.61 km) |
| Merthyr Tudful to Campagnano di Roma | 993.03 mi (1,598.13 km) |
| Merthyr Tudful to Campi Bisenzio | 865.55 mi (1,392.96 km) |
| Merthyr Tudful to Campi Salentina | 1,282.59 mi (2,064.12 km) |
| Merthyr Tudful to Campiglia Marittima | 884.75 mi (1,423.86 km) |
| Merthyr Tudful to Campobasso | 1,102.31 mi (1,774.00 km) |
| Merthyr Tudful to Campobello di Licata | 1,308.19 mi (2,105.34 km) |
| Merthyr Tudful to Campobello di Mazara | 1,250.38 mi (2,012.29 km) |
