| Rhondda to Cortona | 918.91 mi (1,478.84 km) |
| Rhondda to Cosenza | 1,270.33 mi (2,044.40 km) |
| Rhondda to Cossato | 673.16 mi (1,083.35 km) |
| Rhondda to Costa Volpino | 732.66 mi (1,179.10 km) |
| Rhondda to Creazzo | 798.16 mi (1,284.52 km) |
| Rhondda to Crema | 737.36 mi (1,186.66 km) |
| Rhondda to Cremona | 760.78 mi (1,224.36 km) |
| Rhondda to Crevalcore | 820.95 mi (1,321.20 km) |
| Rhondda to Crispiano | 1,240.79 mi (1,996.86 km) |
| Rhondda to Crosia | 1,275.11 mi (2,052.09 km) |
| Rhondda to Crotone | 1,312.40 mi (2,112.11 km) |
| Rhondda to Cuneo | 710.49 mi (1,143.42 km) |
| Rhondda to Cuorgne | 663.40 mi (1,067.64 km) |
| Rhondda to Cusano Milanino | 710.72 mi (1,143.79 km) |
| Rhondda to Cutro | 1,310.20 mi (2,108.56 km) |
