| Sasso Marconi to Orbetello | 135.48 mi (218.03 km) |
| Sasso Marconi to Oria | 422.28 mi (679.60 km) |
| Sasso Marconi to Oristano | 339.01 mi (545.59 km) |
| Sasso Marconi to Orta Nova | 309.78 mi (498.54 km) |
| Sasso Marconi to Orte | 145.64 mi (234.38 km) |
| Sasso Marconi to Ortona | 212.31 mi (341.68 km) |
| Sasso Marconi to Orvieto | 123.92 mi (199.43 km) |
| Sasso Marconi to Orzinuovi | 94.48 mi (152.05 km) |
| Sasso Marconi to Osimo | 127.89 mi (205.81 km) |
| Sasso Marconi to Ospitaletto | 98.38 mi (158.33 km) |
| Sasso Marconi to Ostuni | 409.72 mi (659.39 km) |
| Sasso Marconi to Ottaviano | 295.05 mi (474.83 km) |
| Sasso Marconi to Ovada | 129.32 mi (208.12 km) |
| Sasso Marconi to Ozieri | 287.35 mi (462.44 km) |
| Sasso Marconi to Paceco | 448.46 mi (721.72 km) |
