| s-Gravendeel to Orbetello | 715.53 mi (1,151.54 km) |
| s-Gravendeel to Oria | 994.92 mi (1,601.18 km) |
| s-Gravendeel to Oristano | 842.33 mi (1,355.60 km) |
| s-Gravendeel to Orta Nova | 891.97 mi (1,435.49 km) |
| s-Gravendeel to Orte | 739.55 mi (1,190.19 km) |
| s-Gravendeel to Ortona | 796.49 mi (1,281.82 km) |
| s-Gravendeel to Orvieto | 717.32 mi (1,154.41 km) |
| s-Gravendeel to Orzinuovi | 503.22 mi (809.86 km) |
| s-Gravendeel to Osimo | 705.51 mi (1,135.41 km) |
| s-Gravendeel to Ospitaletto | 496.83 mi (799.57 km) |
| s-Gravendeel to Ostuni | 980.13 mi (1,577.37 km) |
| s-Gravendeel to Ottaviano | 888.21 mi (1,429.43 km) |
| s-Gravendeel to Ovada | 527.12 mi (848.32 km) |
| s-Gravendeel to Ozieri | 801.30 mi (1,289.57 km) |
| s-Gravendeel to Paceco | 1,028.08 mi (1,654.53 km) |
