| Merthyr Tudful to Cabestany | 692.24 mi (1,114.06 km) |
| Merthyr Tudful to Cabries | 702.88 mi (1,131.17 km) |
| Merthyr Tudful to Cachan | 324.13 mi (521.64 km) |
| Merthyr Tudful to Caen | 221.01 mi (355.68 km) |
| Merthyr Tudful to Cagnes-sur-Mer | 740.90 mi (1,192.37 km) |
| Merthyr Tudful to Cahors | 550.64 mi (886.16 km) |
| Merthyr Tudful to Calais | 232.43 mi (374.05 km) |
| Merthyr Tudful to Caluire-et-Cuire | 555.36 mi (893.76 km) |
| Merthyr Tudful to Cambrai | 307.36 mi (494.64 km) |
| Merthyr Tudful to Canet-en-Roussillon | 691.94 mi (1,113.57 km) |
| Merthyr Tudful to Cannes | 743.03 mi (1,195.79 km) |
| Merthyr Tudful to Canteleu | 250.03 mi (402.39 km) |
| Merthyr Tudful to Capbreton | 566.94 mi (912.41 km) |
| Merthyr Tudful to Carcassonne | 646.93 mi (1,041.13 km) |
| Merthyr Tudful to Carmaux | 589.81 mi (949.20 km) |
