| Sinop to Cividale del Friuli | 1,110.50 mi (1,787.18 km) |
| Sinop to Civita Castellana | 1,161.38 mi (1,869.06 km) |
| Sinop to Civitanova Marche | 1,088.74 mi (1,752.16 km) |
| Sinop to Civitavecchia | 1,194.06 mi (1,921.65 km) |
| Sinop to Civitella in Val di Chiana | 1,189.46 mi (1,914.25 km) |
| Sinop to Clusone | 1,275.81 mi (2,053.22 km) |
| Sinop to Coccaglio | 1,273.47 mi (2,049.46 km) |
| Sinop to Codigoro | 1,167.87 mi (1,879.50 km) |
| Sinop to Codogno | 1,286.09 mi (2,069.75 km) |
| Sinop to Codroipo | 1,131.09 mi (1,820.31 km) |
| Sinop to Cogoleto | 1,338.81 mi (2,154.60 km) |
| Sinop to Colle di Val d'Elsa | 1,218.76 mi (1,961.40 km) |
| Sinop to Colle Salvetti | 1,250.38 mi (2,012.29 km) |
| Sinop to Collecchio | 1,260.96 mi (2,029.32 km) |
| Sinop to Colleferro | 1,135.66 mi (1,827.67 km) |
