| Olgiate Olona to Cartagena | 752.35 mi (1,210.79 km) |
| Olgiate Olona to Cartama | 932.58 mi (1,500.84 km) |
| Olgiate Olona to Cartaya | 1,008.00 mi (1,622.21 km) |
| Olgiate Olona to Caspe | 540.39 mi (869.67 km) |
| Olgiate Olona to Cassa de la Selva | 395.82 mi (637.01 km) |
| Olgiate Olona to Castalla | 689.11 mi (1,109.01 km) |
| Olgiate Olona to Castellbisbal | 449.03 mi (722.64 km) |
| Olgiate Olona to Castelldefels | 458.45 mi (737.81 km) |
| Olgiate Olona to Castello de Ampurias | 371.15 mi (597.31 km) |
| Olgiate Olona to Castellon de la Plana | 596.57 mi (960.08 km) |
| Olgiate Olona to Castilleja de la Cuesta | 957.60 mi (1,541.10 km) |
| Olgiate Olona to Catarroja | 638.78 mi (1,028.01 km) |
| Olgiate Olona to Catral | 716.57 mi (1,153.20 km) |
| Olgiate Olona to Caudete | 695.25 mi (1,118.90 km) |
| Olgiate Olona to Cehegin | 756.12 mi (1,216.86 km) |
