| Ostwald to Novi di Modena | 294.32 mi (473.66 km) |
| Ostwald to Novi Ligure | 266.87 mi (429.49 km) |
| Ostwald to Nuoro | 574.49 mi (924.55 km) |
| Ostwald to Occhiobello | 310.44 mi (499.61 km) |
| Ostwald to Oderzo | 294.92 mi (474.63 km) |
| Ostwald to Oggiono | 206.09 mi (331.68 km) |
| Ostwald to Olbia | 534.68 mi (860.49 km) |
| Ostwald to Oleggio | 208.44 mi (335.45 km) |
| Ostwald to Olgiate Comasco | 200.08 mi (322.00 km) |
| Ostwald to Olgiate Olona | 208.97 mi (336.30 km) |
| Ostwald to Omegna | 187.53 mi (301.80 km) |
| Ostwald to Opera | 230.05 mi (370.23 km) |
| Ostwald to Oppeano | 277.90 mi (447.24 km) |
| Ostwald to Orbassano | 245.00 mi (394.28 km) |
| Ostwald to Orbetello | 454.88 mi (732.06 km) |
