| Merthyr Tudful to Busto Arsizio | 699.03 mi (1,124.97 km) |
| Merthyr Tudful to Busto Garolfo | 703.24 mi (1,131.75 km) |
| Merthyr Tudful to Cabras | 994.52 mi (1,600.53 km) |
| Merthyr Tudful to Cadelbosco di Sopra | 801.41 mi (1,289.75 km) |
| Merthyr Tudful to Cadoneghe | 821.30 mi (1,321.76 km) |
| Merthyr Tudful to Cagli | 933.12 mi (1,501.72 km) |
| Merthyr Tudful to Cagliari | 1,052.15 mi (1,693.26 km) |
| Merthyr Tudful to Cairo Montenotte | 737.58 mi (1,187.01 km) |
| Merthyr Tudful to Caivano | 1,120.27 mi (1,802.90 km) |
| Merthyr Tudful to Calcinaia | 853.81 mi (1,374.08 km) |
| Merthyr Tudful to Calcinato | 763.36 mi (1,228.50 km) |
| Merthyr Tudful to Calderara di Reno | 835.05 mi (1,343.88 km) |
| Merthyr Tudful to Caldogno | 798.14 mi (1,284.48 km) |
| Merthyr Tudful to Calenzano | 864.33 mi (1,391.00 km) |
| Merthyr Tudful to Calolziocorte | 711.79 mi (1,145.52 km) |
