| Rhondda to Carmona | 983.56 mi (1,582.89 km) |
| Rhondda to Cartagena | 975.64 mi (1,570.15 km) |
| Rhondda to Cartama | 1,031.52 mi (1,660.07 km) |
| Rhondda to Cartaya | 1,006.91 mi (1,620.46 km) |
| Rhondda to Caspe | 735.04 mi (1,182.93 km) |
| Rhondda to Cassa de la Selva | 734.42 mi (1,181.93 km) |
| Rhondda to Castalla | 909.28 mi (1,463.35 km) |
| Rhondda to Castellbisbal | 745.55 mi (1,199.84 km) |
| Rhondda to Castelldefels | 758.38 mi (1,220.50 km) |
| Rhondda to Castello de Ampurias | 714.75 mi (1,150.27 km) |
| Rhondda to Castellon de la Plana | 819.88 mi (1,319.47 km) |
| Rhondda to Castilleja de la Cuesta | 991.73 mi (1,596.03 km) |
| Rhondda to Catarroja | 856.17 mi (1,377.87 km) |
| Rhondda to Catral | 938.35 mi (1,510.12 km) |
| Rhondda to Caudete | 899.78 mi (1,448.06 km) |
