| Smolyan to Coin | 1,606.39 mi (2,585.24 km) |
| Smolyan to Colindres | 1,432.75 mi (2,305.79 km) |
| Smolyan to Collado-Villalba | 1,489.09 mi (2,396.45 km) |
| Smolyan to Colmenar Viejo | 1,476.28 mi (2,375.85 km) |
| Smolyan to Colmenarejo | 1,490.58 mi (2,398.86 km) |
| Smolyan to Conil de la Frontera | 1,685.44 mi (2,712.46 km) |
| Smolyan to Consuegra | 1,487.19 mi (2,393.40 km) |
| Smolyan to Corbera de Llobregat | 1,174.85 mi (1,890.73 km) |
| Smolyan to Cordoba | 1,579.19 mi (2,541.46 km) |
| Smolyan to Coria del Rio | 1,658.56 mi (2,669.20 km) |
| Smolyan to Crevillente | 1,366.14 mi (2,198.59 km) |
| Smolyan to Cuarte de Huerva | 1,319.00 mi (2,122.72 km) |
| Smolyan to Cubellas | 1,190.20 mi (1,915.44 km) |
| Smolyan to Cuellar | 1,494.49 mi (2,405.15 km) |
| Smolyan to Cuenca | 1,402.05 mi (2,256.38 km) |
