| San Martino Buon Albergo to Orbetello | 205.79 mi (331.18 km) |
| San Martino Buon Albergo to Oria | 473.55 mi (762.10 km) |
| San Martino Buon Albergo to Oristano | 401.47 mi (646.11 km) |
| San Martino Buon Albergo to Orta Nova | 365.02 mi (587.44 km) |
| San Martino Buon Albergo to Orte | 214.05 mi (344.48 km) |
| San Martino Buon Albergo to Ortona | 268.10 mi (431.46 km) |
| San Martino Buon Albergo to Orvieto | 193.07 mi (310.71 km) |
| San Martino Buon Albergo to Orzinuovi | 56.60 mi (91.10 km) |
| San Martino Buon Albergo to Osimo | 177.92 mi (286.34 km) |
| San Martino Buon Albergo to Ospitaletto | 50.65 mi (81.51 km) |
| San Martino Buon Albergo to Ostuni | 459.90 mi (740.14 km) |
| San Martino Buon Albergo to Ottaviano | 358.47 mi (576.90 km) |
| San Martino Buon Albergo to Ovada | 131.30 mi (211.31 km) |
| San Martino Buon Albergo to Ozieri | 350.22 mi (563.62 km) |
| San Martino Buon Albergo to Paceco | 518.99 mi (835.24 km) |
