| Treviglio to Octeville | 594.77 mi (957.18 km) |
| Treviglio to Oignies | 457.87 mi (736.86 km) |
| Treviglio to Oissel | 476.60 mi (767.01 km) |
| Treviglio to Olivet | 398.63 mi (641.53 km) |
| Treviglio to Ollioules | 247.66 mi (398.58 km) |
| Treviglio to Olonne-sur-Mer | 549.22 mi (883.89 km) |
| Treviglio to Oloron-Sainte-Marie | 528.46 mi (850.48 km) |
| Treviglio to Onet Village | 351.36 mi (565.46 km) |
| Treviglio to Onnaing | 435.60 mi (701.03 km) |
| Treviglio to Orange | 253.06 mi (407.26 km) |
| Treviglio to Orchies | 450.54 mi (725.07 km) |
| Treviglio to Orleans | 399.23 mi (642.50 km) |
| Treviglio to Orly | 404.84 mi (651.52 km) |
| Treviglio to Ormesson-sur-Marne | 400.66 mi (644.81 km) |
| Treviglio to Orsay | 411.35 mi (662.01 km) |
