| West Drayton to Orbetello | 831.86 mi (1,338.75 km) |
| West Drayton to Oria | 1,148.70 mi (1,848.65 km) |
| West Drayton to Oristano | 911.17 mi (1,466.39 km) |
| West Drayton to Orta Nova | 1,038.74 mi (1,671.68 km) |
| West Drayton to Orte | 867.86 mi (1,396.69 km) |
| West Drayton to Ortona | 941.22 mi (1,514.75 km) |
| West Drayton to Orvieto | 845.19 mi (1,360.20 km) |
| West Drayton to Orzinuovi | 635.25 mi (1,022.34 km) |
| West Drayton to Osimo | 852.54 mi (1,372.03 km) |
| West Drayton to Ospitaletto | 632.50 mi (1,017.91 km) |
| West Drayton to Ostuni | 1,135.08 mi (1,826.73 km) |
| West Drayton to Ottaviano | 1,022.32 mi (1,645.27 km) |
| West Drayton to Ovada | 633.03 mi (1,018.76 km) |
| West Drayton to Ozieri | 878.91 mi (1,414.47 km) |
| West Drayton to Paceco | 1,127.96 mi (1,815.28 km) |
