| Seveso to Octeville | 571.67 mi (920.01 km) |
| Seveso to Oignies | 437.51 mi (704.10 km) |
| Seveso to Oissel | 453.93 mi (730.52 km) |
| Seveso to Olivet | 375.17 mi (603.77 km) |
| Seveso to Ollioules | 237.29 mi (381.88 km) |
| Seveso to Olonne-sur-Mer | 525.99 mi (846.51 km) |
| Seveso to Oloron-Sainte-Marie | 509.37 mi (819.75 km) |
| Seveso to Onet Village | 331.54 mi (533.56 km) |
| Seveso to Onnaing | 415.69 mi (668.99 km) |
| Seveso to Orange | 235.94 mi (379.71 km) |
| Seveso to Orchies | 430.41 mi (692.67 km) |
| Seveso to Orleans | 375.79 mi (604.78 km) |
| Seveso to Orly | 382.09 mi (614.92 km) |
| Seveso to Ormesson-sur-Marne | 378.01 mi (608.35 km) |
| Seveso to Orsay | 388.49 mi (625.22 km) |
