| Sliven to Civita Castellana | 709.08 mi (1,141.16 km) |
| Sliven to Civitanova Marche | 637.60 mi (1,026.12 km) |
| Sliven to Civitavecchia | 741.80 mi (1,193.81 km) |
| Sliven to Civitella in Val di Chiana | 738.79 mi (1,188.96 km) |
| Sliven to Clusone | 838.30 mi (1,349.12 km) |
| Sliven to Coccaglio | 833.61 mi (1,341.57 km) |
| Sliven to Codigoro | 723.84 mi (1,164.90 km) |
| Sliven to Codogno | 843.44 mi (1,357.38 km) |
| Sliven to Codroipo | 696.88 mi (1,121.52 km) |
| Sliven to Cogoleto | 891.95 mi (1,435.45 km) |
| Sliven to Colle di Val d'Elsa | 768.09 mi (1,236.12 km) |
| Sliven to Colle Salvetti | 800.36 mi (1,288.06 km) |
| Sliven to Collecchio | 815.99 mi (1,313.21 km) |
| Sliven to Colleferro | 683.95 mi (1,100.71 km) |
| Sliven to Collegno | 946.62 mi (1,523.43 km) |
