| Yiewsley to Orbetello | 832.48 mi (1,339.74 km) |
| Yiewsley to Oria | 1,149.26 mi (1,849.56 km) |
| Yiewsley to Oristano | 911.83 mi (1,467.45 km) |
| Yiewsley to Orta Nova | 1,039.31 mi (1,672.61 km) |
| Yiewsley to Orte | 868.47 mi (1,397.66 km) |
| Yiewsley to Ortona | 941.80 mi (1,515.68 km) |
| Yiewsley to Orvieto | 845.79 mi (1,361.17 km) |
| Yiewsley to Orzinuovi | 635.84 mi (1,023.28 km) |
| Yiewsley to Osimo | 853.11 mi (1,372.95 km) |
| Yiewsley to Ospitaletto | 633.08 mi (1,018.84 km) |
| Yiewsley to Ostuni | 1,135.64 mi (1,827.64 km) |
| Yiewsley to Ottaviano | 1,022.92 mi (1,646.23 km) |
| Yiewsley to Ovada | 633.64 mi (1,019.75 km) |
| Yiewsley to Ozieri | 879.56 mi (1,415.52 km) |
| Yiewsley to Paceco | 1,128.60 mi (1,816.31 km) |
