| Omegna to Oerlinghausen | 420.85 mi (677.29 km) |
| Omegna to Oestrich-Winkel | 285.42 mi (459.33 km) |
| Omegna to Offenburg | 180.23 mi (290.06 km) |
| Omegna to Oftersheim | 241.45 mi (388.58 km) |
| Omegna to Ohrdruf | 358.25 mi (576.55 km) |
| Omegna to Ohringen | 235.11 mi (378.37 km) |
| Omegna to Olbernhau | 400.79 mi (645.01 km) |
| Omegna to Olching | 210.94 mi (339.48 km) |
| Omegna to Oldenburg | 502.09 mi (808.04 km) |
| Omegna to Oldenburg in Holstein | 592.06 mi (952.83 km) |
| Omegna to Olfen | 406.08 mi (653.52 km) |
| Omegna to Olpe | 356.01 mi (572.95 km) |
| Omegna to Olsberg | 378.09 mi (608.47 km) |
| Omegna to Oranienburg | 522.25 mi (840.49 km) |
| Omegna to Ortenberg | 310.82 mi (500.21 km) |
