| Rio de Mouro to Orbetello | 1,104.21 mi (1,777.05 km) |
| Rio de Mouro to Oria | 1,434.26 mi (2,308.21 km) |
| Rio de Mouro to Oristano | 959.45 mi (1,544.08 km) |
| Rio de Mouro to Orta Nova | 1,331.64 mi (2,143.07 km) |
| Rio de Mouro to Orte | 1,163.88 mi (1,873.08 km) |
| Rio de Mouro to Ortona | 1,265.75 mi (2,037.04 km) |
| Rio de Mouro to Orvieto | 1,151.75 mi (1,853.57 km) |
| Rio de Mouro to Orzinuovi | 1,085.36 mi (1,746.72 km) |
| Rio de Mouro to Osimo | 1,226.97 mi (1,974.62 km) |
| Rio de Mouro to Ospitaletto | 1,095.17 mi (1,762.51 km) |
| Rio de Mouro to Ostuni | 1,430.60 mi (2,302.33 km) |
| Rio de Mouro to Ottaviano | 1,267.95 mi (2,040.57 km) |
| Rio de Mouro to Ovada | 1,009.44 mi (1,624.54 km) |
| Rio de Mouro to Ozieri | 981.30 mi (1,579.25 km) |
| Rio de Mouro to Paceco | 1,183.71 mi (1,905.00 km) |
