| Leidschendam to Orbetello | 738.16 mi (1,187.96 km) |
| Leidschendam to Oria | 1,016.33 mi (1,635.62 km) |
| Leidschendam to Oristano | 864.73 mi (1,391.65 km) |
| Leidschendam to Orta Nova | 913.76 mi (1,470.56 km) |
| Leidschendam to Orte | 761.99 mi (1,226.31 km) |
| Leidschendam to Ortona | 818.42 mi (1,317.13 km) |
| Leidschendam to Orvieto | 739.79 mi (1,190.57 km) |
| Leidschendam to Orzinuovi | 525.75 mi (846.12 km) |
| Leidschendam to Osimo | 727.43 mi (1,170.68 km) |
| Leidschendam to Ospitaletto | 519.29 mi (835.72 km) |
| Leidschendam to Ostuni | 1,001.48 mi (1,611.73 km) |
| Leidschendam to Ottaviano | 910.44 mi (1,465.21 km) |
| Leidschendam to Ovada | 549.80 mi (884.82 km) |
| Leidschendam to Ozieri | 823.82 mi (1,325.82 km) |
| Leidschendam to Paceco | 1,050.77 mi (1,691.04 km) |
