| Rhondda to Cabestany | 685.28 mi (1,102.85 km) |
| Rhondda to Cabries | 697.12 mi (1,121.91 km) |
| Rhondda to Cachan | 320.34 mi (515.54 km) |
| Rhondda to Caen | 215.23 mi (346.38 km) |
| Rhondda to Cagnes-sur-Mer | 735.96 mi (1,184.42 km) |
| Rhondda to Cahors | 543.48 mi (874.64 km) |
| Rhondda to Calais | 232.49 mi (374.16 km) |
| Rhondda to Caluire-et-Cuire | 550.46 mi (885.89 km) |
| Rhondda to Cambrai | 306.38 mi (493.07 km) |
| Rhondda to Canet-en-Roussillon | 685.01 mi (1,102.42 km) |
| Rhondda to Cannes | 737.99 mi (1,187.67 km) |
| Rhondda to Canteleu | 246.15 mi (396.15 km) |
| Rhondda to Capbreton | 558.59 mi (898.97 km) |
| Rhondda to Carcassonne | 639.85 mi (1,029.74 km) |
| Rhondda to Carmaux | 582.86 mi (938.02 km) |
