| Smolyan to Cartagena | 1,389.39 mi (2,236.00 km) |
| Smolyan to Cartama | 1,599.11 mi (2,573.51 km) |
| Smolyan to Cartaya | 1,715.41 mi (2,760.69 km) |
| Smolyan to Caspe | 1,277.53 mi (2,055.99 km) |
| Smolyan to Cassa de la Selva | 1,122.46 mi (1,806.43 km) |
| Smolyan to Castalla | 1,351.84 mi (2,175.58 km) |
| Smolyan to Castellbisbal | 1,171.66 mi (1,885.61 km) |
| Smolyan to Castelldefels | 1,173.90 mi (1,889.21 km) |
| Smolyan to Castello de Ampurias | 1,109.75 mi (1,785.98 km) |
| Smolyan to Castellon de la Plana | 1,294.22 mi (2,082.84 km) |
| Smolyan to Castilleja de la Cuesta | 1,656.22 mi (2,665.43 km) |
| Smolyan to Catarroja | 1,322.95 mi (2,129.09 km) |
| Smolyan to Catral | 1,367.83 mi (2,201.31 km) |
| Smolyan to Caudete | 1,366.10 mi (2,198.53 km) |
| Smolyan to Cehegin | 1,420.62 mi (2,286.27 km) |
