| Somma Lombardo to Octeville | 552.45 mi (889.08 km) |
| Somma Lombardo to Oignies | 422.51 mi (679.97 km) |
| Somma Lombardo to Oissel | 435.52 mi (700.91 km) |
| Somma Lombardo to Olivet | 355.11 mi (571.50 km) |
| Somma Lombardo to Ollioules | 225.19 mi (362.40 km) |
| Somma Lombardo to Olonne-sur-Mer | 504.73 mi (812.28 km) |
| Somma Lombardo to Oloron-Sainte-Marie | 489.91 mi (788.44 km) |
| Somma Lombardo to Onet Village | 311.70 mi (501.64 km) |
| Somma Lombardo to Onnaing | 401.31 mi (645.85 km) |
| Somma Lombardo to Orange | 218.21 mi (351.18 km) |
| Somma Lombardo to Orchies | 415.72 mi (669.04 km) |
| Somma Lombardo to Orleans | 355.79 mi (572.59 km) |
| Somma Lombardo to Orly | 363.60 mi (585.15 km) |
| Somma Lombardo to Ormesson-sur-Marne | 359.69 mi (578.87 km) |
| Somma Lombardo to Orsay | 369.79 mi (595.11 km) |
