| Rhondda to Cernavoda | 1,525.18 mi (2,454.54 km) |
| Rhondda to Chitila | 1,431.96 mi (2,304.52 km) |
| Rhondda to Cisnadie | 1,313.37 mi (2,113.66 km) |
| Rhondda to Cluj-Napoca | 1,256.37 mi (2,021.93 km) |
| Rhondda to Codlea | 1,368.99 mi (2,203.18 km) |
| Rhondda to Comanesti | 1,389.14 mi (2,235.60 km) |
| Rhondda to Comarnic | 1,391.79 mi (2,239.86 km) |
| Rhondda to Constanta | 1,556.76 mi (2,505.36 km) |
| Rhondda to Corabia | 1,396.11 mi (2,246.82 km) |
| Rhondda to Costesti | 1,379.59 mi (2,220.23 km) |
| Rhondda to Covasna | 1,395.78 mi (2,246.30 km) |
| Rhondda to Craiova | 1,346.66 mi (2,167.25 km) |
| Rhondda to Cristuru Secuiesc | 1,332.79 mi (2,144.92 km) |
| Rhondda to Cugir | 1,275.63 mi (2,052.93 km) |
| Rhondda to Cumpana | 1,555.36 mi (2,503.11 km) |
