| Mortara to Octeville | 571.39 mi (919.57 km) |
| Mortara to Oignies | 448.32 mi (721.50 km) |
| Mortara to Oissel | 456.48 mi (734.64 km) |
| Mortara to Olivet | 371.98 mi (598.65 km) |
| Mortara to Ollioules | 204.79 mi (329.57 km) |
| Mortara to Olonne-sur-Mer | 513.37 mi (826.19 km) |
| Mortara to Oloron-Sainte-Marie | 484.25 mi (779.33 km) |
| Mortara to Onet Village | 307.83 mi (495.40 km) |
| Mortara to Onnaing | 427.72 mi (688.35 km) |
| Mortara to Orange | 208.19 mi (335.05 km) |
| Mortara to Orchies | 441.83 mi (711.06 km) |
| Mortara to Orleans | 372.83 mi (600.02 km) |
| Mortara to Orly | 384.51 mi (618.81 km) |
| Mortara to Ormesson-sur-Marne | 380.97 mi (613.11 km) |
| Mortara to Orsay | 390.25 mi (628.04 km) |
