| Omegna to Oberkirch | 184.08 mi (296.25 km) |
| Omegna to Obernburg am Main | 275.85 mi (443.93 km) |
| Omegna to Obernkirchen | 442.55 mi (712.22 km) |
| Omegna to Oberschleissheim | 221.26 mi (356.09 km) |
| Omegna to Oberstdorf | 138.14 mi (222.32 km) |
| Omegna to Obertraubling | 276.35 mi (444.74 km) |
| Omegna to Obertshausen | 290.07 mi (466.83 km) |
| Omegna to Oberursel | 298.95 mi (481.11 km) |
| Omegna to Ochsenfurt | 271.76 mi (437.35 km) |
| Omegna to Ochsenhausen | 168.10 mi (270.53 km) |
| Omegna to Ochtrup | 440.63 mi (709.12 km) |
| Omegna to Odenthal | 361.05 mi (581.05 km) |
| Omegna to Oelde | 411.63 mi (662.45 km) |
| Omegna to Oelsnitz | 358.19 mi (576.45 km) |
| Omegna to Oer-Erkenschwick | 401.71 mi (646.49 km) |
