| Gebze to Carmona | 1,880.80 mi (3,026.85 km) |
| Gebze to Cartagena | 1,635.16 mi (2,631.53 km) |
| Gebze to Cartama | 1,845.18 mi (2,969.52 km) |
| Gebze to Cartaya | 1,963.84 mi (3,160.49 km) |
| Gebze to Caspe | 1,529.05 mi (2,460.77 km) |
| Gebze to Cassa de la Selva | 1,374.22 mi (2,211.59 km) |
| Gebze to Castalla | 1,599.71 mi (2,574.49 km) |
| Gebze to Castellbisbal | 1,423.20 mi (2,290.41 km) |
| Gebze to Castelldefels | 1,425.27 mi (2,293.74 km) |
| Gebze to Castello de Ampurias | 1,361.65 mi (2,191.37 km) |
| Gebze to Castellon de la Plana | 1,544.35 mi (2,485.39 km) |
| Gebze to Castilleja de la Cuesta | 1,904.32 mi (3,064.70 km) |
| Gebze to Catarroja | 1,572.26 mi (2,530.31 km) |
| Gebze to Catral | 1,614.82 mi (2,598.80 km) |
| Gebze to Caudete | 1,614.33 mi (2,598.02 km) |
