| Merthyr Tudful to Cadiz | 1,060.47 mi (1,706.66 km) |
| Merthyr Tudful to Calafell | 765.07 mi (1,231.26 km) |
| Merthyr Tudful to Calahorra | 655.79 mi (1,055.39 km) |
| Merthyr Tudful to Calasparra | 937.14 mi (1,508.19 km) |
| Merthyr Tudful to Calatayud | 722.80 mi (1,163.23 km) |
| Merthyr Tudful to Caldas de Montbuy | 745.81 mi (1,200.27 km) |
| Merthyr Tudful to Caldas de Reyes | 677.69 mi (1,090.64 km) |
| Merthyr Tudful to Calella | 755.36 mi (1,215.63 km) |
| Merthyr Tudful to Callosa de Segura | 948.84 mi (1,527.01 km) |
| Merthyr Tudful to Calpe | 919.93 mi (1,480.48 km) |
| Merthyr Tudful to Calvia | 887.33 mi (1,428.02 km) |
| Merthyr Tudful to Camas | 999.27 mi (1,608.17 km) |
| Merthyr Tudful to Cambados | 687.15 mi (1,105.85 km) |
| Merthyr Tudful to Cambre | 628.24 mi (1,011.05 km) |
| Merthyr Tudful to Cambrils | 766.93 mi (1,234.25 km) |
