| Rhondda to Cocentaina | 900.83 mi (1,449.75 km) |
| Rhondda to Coin | 1,034.95 mi (1,665.60 km) |
| Rhondda to Colindres | 567.89 mi (913.94 km) |
| Rhondda to Collado-Villalba | 759.34 mi (1,222.05 km) |
| Rhondda to Colmenar Viejo | 757.24 mi (1,218.65 km) |
| Rhondda to Colmenarejo | 764.37 mi (1,230.13 km) |
| Rhondda to Conil de la Frontera | 1,068.60 mi (1,719.74 km) |
| Rhondda to Consuegra | 839.81 mi (1,351.54 km) |
| Rhondda to Corbera de Llobregat | 748.66 mi (1,204.85 km) |
| Rhondda to Cordoba | 951.05 mi (1,530.57 km) |
| Rhondda to Coria del Rio | 998.59 mi (1,607.08 km) |
| Rhondda to Crevillente | 932.20 mi (1,500.24 km) |
| Rhondda to Cuarte de Huerva | 703.17 mi (1,131.64 km) |
| Rhondda to Cubellas | 758.31 mi (1,220.38 km) |
| Rhondda to Cuellar | 707.06 mi (1,137.90 km) |
