| Laguna de Duero to Orbetello | 818.69 mi (1,317.55 km) |
| Laguna de Duero to Oria | 1,163.86 mi (1,873.05 km) |
| Laguna de Duero to Oristano | 705.49 mi (1,135.37 km) |
| Laguna de Duero to Orta Nova | 1,055.48 mi (1,698.63 km) |
| Laguna de Duero to Orte | 878.46 mi (1,413.75 km) |
| Laguna de Duero to Ortona | 981.44 mi (1,579.48 km) |
| Laguna de Duero to Orvieto | 864.07 mi (1,390.59 km) |
| Laguna de Duero to Orzinuovi | 778.88 mi (1,253.49 km) |
| Laguna de Duero to Osimo | 933.96 mi (1,503.07 km) |
| Laguna de Duero to Ospitaletto | 788.19 mi (1,268.47 km) |
| Laguna de Duero to Ostuni | 1,158.30 mi (1,864.11 km) |
| Laguna de Duero to Ottaviano | 996.82 mi (1,604.23 km) |
| Laguna de Duero to Ovada | 705.37 mi (1,135.19 km) |
| Laguna de Duero to Ozieri | 717.08 mi (1,154.02 km) |
| Laguna de Duero to Paceco | 948.11 mi (1,525.84 km) |
