| Rhondda to Collegno | 676.03 mi (1,087.96 km) |
| Rhondda to Cologno al Serio | 728.34 mi (1,172.15 km) |
| Rhondda to Cologno Monzese | 715.17 mi (1,150.96 km) |
| Rhondda to Colorno | 782.75 mi (1,259.71 km) |
| Rhondda to Comacchio | 860.59 mi (1,384.99 km) |
| Rhondda to Comiso | 1,342.05 mi (2,159.82 km) |
| Rhondda to Como | 695.53 mi (1,119.34 km) |
| Rhondda to Concordia Sagittaria | 842.26 mi (1,355.49 km) |
| Rhondda to Concorezzo | 714.56 mi (1,149.97 km) |
| Rhondda to Conegliano | 815.65 mi (1,312.66 km) |
| Rhondda to Conselice | 855.48 mi (1,376.76 km) |
| Rhondda to Conselve | 825.54 mi (1,328.57 km) |
| Rhondda to Conversano | 1,218.70 mi (1,961.31 km) |
| Rhondda to Copertino | 1,287.52 mi (2,072.06 km) |
| Rhondda to Copparo | 838.56 mi (1,349.53 km) |
