| Greasley to Orbetello | 930.48 mi (1,497.47 km) |
| Greasley to Oria | 1,237.33 mi (1,991.30 km) |
| Greasley to Oristano | 1,018.26 mi (1,638.73 km) |
| Greasley to Orta Nova | 1,129.58 mi (1,817.88 km) |
| Greasley to Orte | 963.65 mi (1,550.84 km) |
| Greasley to Ortona | 1,032.40 mi (1,661.48 km) |
| Greasley to Orvieto | 940.98 mi (1,514.36 km) |
| Greasley to Orzinuovi | 728.39 mi (1,172.23 km) |
| Greasley to Osimo | 942.54 mi (1,516.87 km) |
| Greasley to Ospitaletto | 724.56 mi (1,166.06 km) |
| Greasley to Ostuni | 1,223.23 mi (1,968.60 km) |
| Greasley to Ottaviano | 1,117.12 mi (1,797.82 km) |
| Greasley to Ovada | 732.58 mi (1,178.97 km) |
| Greasley to Ozieri | 984.81 mi (1,584.89 km) |
| Greasley to Paceco | 1,231.09 mi (1,981.25 km) |
