| Shoreline to Orbetello | 5,591.52 mi (8,998.68 km) |
| Shoreline to Oria | 5,864.36 mi (9,437.78 km) |
| Shoreline to Oristano | 5,674.22 mi (9,131.77 km) |
| Shoreline to Orta Nova | 5,768.44 mi (9,283.40 km) |
| Shoreline to Orte | 5,619.47 mi (9,043.67 km) |
| Shoreline to Ortona | 5,674.90 mi (9,132.87 km) |
| Shoreline to Orvieto | 5,597.08 mi (9,007.63 km) |
| Shoreline to Orzinuovi | 5,382.60 mi (8,662.45 km) |
| Shoreline to Osimo | 5,583.99 mi (8,986.56 km) |
| Shoreline to Ospitaletto | 5,376.80 mi (8,653.13 km) |
| Shoreline to Ostuni | 5,848.70 mi (9,412.58 km) |
| Shoreline to Ottaviano | 5,768.56 mi (9,283.61 km) |
| Shoreline to Ovada | 5,395.41 mi (8,683.07 km) |
| Shoreline to Ozieri | 5,645.00 mi (9,084.75 km) |
| Shoreline to Paceco | 5,894.94 mi (9,486.99 km) |
