| Nizza Monferrato to Oberkirch | 260.01 mi (418.45 km) |
| Nizza Monferrato to Obernburg am Main | 351.91 mi (566.34 km) |
| Nizza Monferrato to Obernkirchen | 518.79 mi (834.92 km) |
| Nizza Monferrato to Oberschleissheim | 284.51 mi (457.87 km) |
| Nizza Monferrato to Oberstdorf | 204.06 mi (328.40 km) |
| Nizza Monferrato to Obertraubling | 340.89 mi (548.61 km) |
| Nizza Monferrato to Obertshausen | 366.32 mi (589.54 km) |
| Nizza Monferrato to Oberursel | 375.22 mi (603.86 km) |
| Nizza Monferrato to Ochsenfurt | 346.27 mi (557.27 km) |
| Nizza Monferrato to Ochsenhausen | 240.12 mi (386.44 km) |
| Nizza Monferrato to Ochtrup | 516.17 mi (830.69 km) |
| Nizza Monferrato to Odenthal | 436.20 mi (701.99 km) |
| Nizza Monferrato to Oelde | 487.79 mi (785.03 km) |
| Nizza Monferrato to Oelsnitz | 428.23 mi (689.17 km) |
| Nizza Monferrato to Oer-Erkenschwick | 477.20 mi (767.98 km) |
