| West Ham to Orbetello | 818.94 mi (1,317.96 km) |
| West Ham to Oria | 1,133.20 mi (1,823.70 km) |
| West Ham to Oristano | 902.40 mi (1,452.28 km) |
| West Ham to Orta Nova | 1,023.70 mi (1,647.48 km) |
| West Ham to Orte | 854.06 mi (1,374.47 km) |
| West Ham to Ortona | 926.23 mi (1,490.62 km) |
| West Ham to Orvieto | 831.37 mi (1,337.97 km) |
| West Ham to Orzinuovi | 620.59 mi (998.74 km) |
| West Ham to Osimo | 837.24 mi (1,347.40 km) |
| West Ham to Ospitaletto | 617.56 mi (993.87 km) |
| West Ham to Ostuni | 1,119.47 mi (1,801.62 km) |
| West Ham to Ottaviano | 1,008.28 mi (1,622.68 km) |
| West Ham to Ovada | 620.35 mi (998.36 km) |
| West Ham to Ozieri | 869.31 mi (1,399.03 km) |
| West Ham to Paceco | 1,116.90 mi (1,797.48 km) |
