| Olgiate Olona to Noventa Vicentina | 130.68 mi (210.31 km) |
| Olgiate Olona to Novi di Modena | 110.64 mi (178.05 km) |
| Olgiate Olona to Novi Ligure | 60.58 mi (97.50 km) |
| Olgiate Olona to Nuoro | 368.04 mi (592.31 km) |
| Olgiate Olona to Occhiobello | 140.08 mi (225.43 km) |
| Olgiate Olona to Oderzo | 174.44 mi (280.73 km) |
| Olgiate Olona to Oggiono | 24.79 mi (39.89 km) |
| Olgiate Olona to Olbia | 327.36 mi (526.83 km) |
| Olgiate Olona to Oleggio | 12.30 mi (19.79 km) |
| Olgiate Olona to Olgiate Comasco | 11.12 mi (17.89 km) |
| Olgiate Olona to Omegna | 28.52 mi (45.90 km) |
| Olgiate Olona to Opera | 23.64 mi (38.05 km) |
| Olgiate Olona to Oppeano | 113.80 mi (183.14 km) |
| Olgiate Olona to Orbassano | 78.42 mi (126.20 km) |
| Olgiate Olona to Orbetello | 249.14 mi (400.95 km) |
