| Merthyr Tudful to Campo de Criptana | 852.91 mi (1,372.63 km) |
| Merthyr Tudful to Campos del Puerto | 904.33 mi (1,455.38 km) |
| Merthyr Tudful to Canals | 893.32 mi (1,437.66 km) |
| Merthyr Tudful to Candelaria | 1,749.89 mi (2,816.18 km) |
| Merthyr Tudful to Canet de Mar | 755.60 mi (1,216.02 km) |
| Merthyr Tudful to Cangas | 702.19 mi (1,130.06 km) |
| Merthyr Tudful to Cangas de Narcea | 610.22 mi (982.05 km) |
| Merthyr Tudful to Canovellas | 748.70 mi (1,204.92 km) |
| Merthyr Tudful to Canteras | 982.92 mi (1,581.86 km) |
| Merthyr Tudful to Cantillana | 984.36 mi (1,584.17 km) |
| Merthyr Tudful to Capdepera | 893.65 mi (1,438.19 km) |
| Merthyr Tudful to Carballo | 638.66 mi (1,027.82 km) |
| Merthyr Tudful to Carcagente | 883.31 mi (1,421.55 km) |
| Merthyr Tudful to Cardedeu | 748.52 mi (1,204.62 km) |
| Merthyr Tudful to Carlet | 875.64 mi (1,409.20 km) |
