| Leiderdorp to Orbetello | 740.62 mi (1,191.91 km) |
| Leiderdorp to Oria | 1,016.69 mi (1,636.20 km) |
| Leiderdorp to Oristano | 868.86 mi (1,398.30 km) |
| Leiderdorp to Orta Nova | 914.57 mi (1,471.86 km) |
| Leiderdorp to Orte | 763.88 mi (1,229.34 km) |
| Leiderdorp to Ortona | 819.43 mi (1,318.75 km) |
| Leiderdorp to Orvieto | 741.72 mi (1,193.68 km) |
| Leiderdorp to Orzinuovi | 527.88 mi (849.54 km) |
| Leiderdorp to Osimo | 728.43 mi (1,172.29 km) |
| Leiderdorp to Ospitaletto | 521.26 mi (838.88 km) |
| Leiderdorp to Ostuni | 1,001.78 mi (1,612.21 km) |
| Leiderdorp to Ottaviano | 911.89 mi (1,467.54 km) |
| Leiderdorp to Ovada | 553.03 mi (890.02 km) |
| Leiderdorp to Ozieri | 827.70 mi (1,332.05 km) |
| Leiderdorp to Paceco | 1,053.60 mi (1,695.61 km) |
