| Oosterend to Orbetello | 767.61 mi (1,235.34 km) |
| Oosterend to Oria | 1,020.00 mi (1,641.54 km) |
| Oosterend to Oristano | 912.77 mi (1,468.96 km) |
| Oosterend to Orta Nova | 923.19 mi (1,485.72 km) |
| Oosterend to Orte | 784.70 mi (1,262.85 km) |
| Oosterend to Ortona | 830.65 mi (1,336.81 km) |
| Oosterend to Orvieto | 763.21 mi (1,228.27 km) |
| Oosterend to Orzinuovi | 553.39 mi (890.60 km) |
| Oosterend to Osimo | 740.13 mi (1,191.12 km) |
| Oosterend to Ospitaletto | 545.18 mi (877.38 km) |
| Oosterend to Ostuni | 1,004.58 mi (1,616.72 km) |
| Oosterend to Ottaviano | 927.30 mi (1,492.35 km) |
| Oosterend to Ovada | 589.62 mi (948.90 km) |
| Oosterend to Ozieri | 869.03 mi (1,398.57 km) |
| Oosterend to Paceco | 1,083.17 mi (1,743.20 km) |
