| Bologna to Octeville | 705.27 mi (1,135.02 km) |
| Bologna to Oignies | 567.16 mi (912.75 km) |
| Bologna to Oissel | 587.63 mi (945.71 km) |
| Bologna to Olivet | 507.72 mi (817.10 km) |
| Bologna to Ollioules | 289.47 mi (465.86 km) |
| Bologna to Olonne-sur-Mer | 649.66 mi (1,045.52 km) |
| Bologna to Oloron-Sainte-Marie | 601.64 mi (968.25 km) |
| Bologna to Onet Village | 431.57 mi (694.55 km) |
| Bologna to Onnaing | 544.23 mi (875.85 km) |
| Bologna to Orange | 323.82 mi (521.13 km) |
| Bologna to Orchies | 559.49 mi (900.42 km) |
| Bologna to Orleans | 508.45 mi (818.26 km) |
| Bologna to Orly | 515.82 mi (830.14 km) |
| Bologna to Ormesson-sur-Marne | 511.71 mi (823.52 km) |
| Bologna to Orsay | 522.24 mi (840.46 km) |
