| Rhondda to Cehegin | 937.67 mi (1,509.04 km) |
| Rhondda to Cervello | 750.46 mi (1,207.75 km) |
| Rhondda to Cervera | 722.19 mi (1,162.25 km) |
| Rhondda to Ceuti | 941.09 mi (1,514.54 km) |
| Rhondda to Cheste | 848.73 mi (1,365.91 km) |
| Rhondda to Chiclana de la Frontera | 1,058.71 mi (1,703.83 km) |
| Rhondda to Chipiona | 1,038.86 mi (1,671.88 km) |
| Rhondda to Chiva | 849.04 mi (1,366.40 km) |
| Rhondda to Churriana de la Vega | 999.56 mi (1,608.64 km) |
| Rhondda to Ciempozuelos | 791.64 mi (1,274.02 km) |
| Rhondda to Cieza | 929.30 mi (1,495.57 km) |
| Rhondda to Cisterniga | 693.46 mi (1,116.01 km) |
| Rhondda to Ciudad de Melilla | 1,128.77 mi (1,816.58 km) |
| Rhondda to Ciudad Real | 873.16 mi (1,405.21 km) |
| Rhondda to Ciudad-Rodrigo | 775.70 mi (1,248.36 km) |
