| Grammichele to Novi di Modena | 564.95 mi (909.20 km) |
| Grammichele to Novi Ligure | 603.63 mi (971.45 km) |
| Grammichele to Nuoro | 357.04 mi (574.60 km) |
| Grammichele to Occhiobello | 555.65 mi (894.24 km) |
| Grammichele to Oderzo | 602.10 mi (968.99 km) |
| Grammichele to Oggiono | 651.80 mi (1,048.98 km) |
| Grammichele to Olbia | 375.83 mi (604.85 km) |
| Grammichele to Oleggio | 657.14 mi (1,057.56 km) |
| Grammichele to Olgiate Comasco | 660.32 mi (1,062.68 km) |
| Grammichele to Olgiate Olona | 653.16 mi (1,051.15 km) |
| Grammichele to Omegna | 679.24 mi (1,093.12 km) |
| Grammichele to Opera | 630.25 mi (1,014.29 km) |
| Grammichele to Oppeano | 586.57 mi (944.00 km) |
| Grammichele to Orbassano | 652.47 mi (1,050.05 km) |
| Grammichele to Orbetello | 404.04 mi (650.24 km) |
