| Smolyan to Civita Castellana | 633.01 mi (1,018.73 km) |
| Smolyan to Civitanova Marche | 571.16 mi (919.20 km) |
| Smolyan to Civitavecchia | 664.34 mi (1,069.15 km) |
| Smolyan to Civitella in Val di Chiana | 672.67 mi (1,082.56 km) |
| Smolyan to Clusone | 792.56 mi (1,275.50 km) |
| Smolyan to Coccaglio | 785.15 mi (1,263.57 km) |
| Smolyan to Codigoro | 671.45 mi (1,080.59 km) |
| Smolyan to Codogno | 791.24 mi (1,273.37 km) |
| Smolyan to Codroipo | 657.50 mi (1,058.14 km) |
| Smolyan to Cogoleto | 832.76 mi (1,340.20 km) |
| Smolyan to Colle di Val d'Elsa | 701.67 mi (1,129.23 km) |
| Smolyan to Colle Salvetti | 735.49 mi (1,183.65 km) |
| Smolyan to Collecchio | 760.77 mi (1,224.34 km) |
| Smolyan to Colleferro | 602.73 mi (970.00 km) |
| Smolyan to Collegno | 892.10 mi (1,435.70 km) |
