| Gebze to Cividale del Friuli | 880.07 mi (1,416.33 km) |
| Gebze to Civita Castellana | 884.81 mi (1,423.96 km) |
| Gebze to Civitanova Marche | 822.49 mi (1,323.67 km) |
| Gebze to Civitavecchia | 915.95 mi (1,474.08 km) |
| Gebze to Civitella in Val di Chiana | 924.08 mi (1,487.17 km) |
| Gebze to Clusone | 1,036.91 mi (1,668.74 km) |
| Gebze to Coccaglio | 1,030.88 mi (1,659.04 km) |
| Gebze to Codigoro | 918.73 mi (1,478.55 km) |
| Gebze to Codogno | 1,038.70 mi (1,671.62 km) |
| Gebze to Codroipo | 897.80 mi (1,444.87 km) |
| Gebze to Cogoleto | 1,082.81 mi (1,742.62 km) |
| Gebze to Colle di Val d'Elsa | 953.16 mi (1,533.97 km) |
| Gebze to Colle Salvetti | 986.76 mi (1,588.03 km) |
| Gebze to Collecchio | 1,009.38 mi (1,624.44 km) |
| Gebze to Colleferro | 853.71 mi (1,373.92 km) |
