| Olgiate Olona to Cividale del Friuli | 221.24 mi (356.05 km) |
| Olgiate Olona to Civita Castellana | 289.64 mi (466.12 km) |
| Olgiate Olona to Civitanova Marche | 288.33 mi (464.02 km) |
| Olgiate Olona to Civitavecchia | 284.04 mi (457.12 km) |
| Olgiate Olona to Civitella in Val di Chiana | 207.18 mi (333.43 km) |
| Olgiate Olona to Clusone | 54.24 mi (87.30 km) |
| Olgiate Olona to Coccaglio | 53.16 mi (85.55 km) |
| Olgiate Olona to Codigoro | 166.74 mi (268.34 km) |
| Olgiate Olona to Codogno | 51.56 mi (82.98 km) |
| Olgiate Olona to Codroipo | 198.59 mi (319.60 km) |
| Olgiate Olona to Cogoleto | 86.72 mi (139.57 km) |
| Olgiate Olona to Colle di Val d'Elsa | 189.98 mi (305.74 km) |
| Olgiate Olona to Colle Salvetti | 161.02 mi (259.13 km) |
| Olgiate Olona to Collecchio | 89.11 mi (143.40 km) |
| Olgiate Olona to Colleferro | 339.40 mi (546.22 km) |
