| Kocaeli to Cividale del Friuli | 903.35 mi (1,453.80 km) |
| Kocaeli to Civita Castellana | 910.11 mi (1,464.68 km) |
| Kocaeli to Civitanova Marche | 847.45 mi (1,363.84 km) |
| Kocaeli to Civitavecchia | 941.29 mi (1,514.86 km) |
| Kocaeli to Civitella in Val di Chiana | 949.05 mi (1,527.35 km) |
| Kocaeli to Clusone | 1,060.78 mi (1,707.17 km) |
| Kocaeli to Coccaglio | 1,054.93 mi (1,697.75 km) |
| Kocaeli to Codigoro | 943.02 mi (1,517.64 km) |
| Kocaeli to Codogno | 1,062.98 mi (1,710.70 km) |
| Kocaeli to Codroipo | 921.26 mi (1,482.62 km) |
| Kocaeli to Cogoleto | 1,107.49 mi (1,782.33 km) |
| Kocaeli to Colle di Val d'Elsa | 978.15 mi (1,574.18 km) |
| Kocaeli to Colle Salvetti | 1,011.69 mi (1,628.16 km) |
| Kocaeli to Collecchio | 1,033.84 mi (1,663.80 km) |
| Kocaeli to Colleferro | 879.11 mi (1,414.80 km) |
