| Aliso Viejo to Orbetello | 6,270.70 mi (10,091.71 km) |
| Aliso Viejo to Oria | 6,581.45 mi (10,591.82 km) |
| Aliso Viejo to Oristano | 6,312.27 mi (10,158.62 km) |
| Aliso Viejo to Orta Nova | 6,475.49 mi (10,421.30 km) |
| Aliso Viejo to Orte | 6,308.04 mi (10,151.81 km) |
| Aliso Viejo to Ortona | 6,378.49 mi (10,265.18 km) |
| Aliso Viejo to Orvieto | 6,285.37 mi (10,115.32 km) |
| Aliso Viejo to Orzinuovi | 6,074.31 mi (9,775.66 km) |
| Aliso Viejo to Osimo | 6,288.33 mi (10,120.09 km) |
| Aliso Viejo to Ospitaletto | 6,070.72 mi (9,769.87 km) |
| Aliso Viejo to Ostuni | 6,566.87 mi (10,568.35 km) |
| Aliso Viejo to Ottaviano | 6,462.42 mi (10,400.25 km) |
| Aliso Viejo to Ovada | 6,071.70 mi (9,771.46 km) |
| Aliso Viejo to Ozieri | 6,291.96 mi (10,125.94 km) |
| Aliso Viejo to Paceco | 6,551.91 mi (10,544.28 km) |
