| Sileby to Orbetello | 911.28 mi (1,466.56 km) |
| Sileby to Oria | 1,219.95 mi (1,963.31 km) |
| Sileby to Oristano | 997.63 mi (1,605.53 km) |
| Sileby to Orta Nova | 1,111.78 mi (1,789.23 km) |
| Sileby to Orte | 944.94 mi (1,520.73 km) |
| Sileby to Ortona | 1,014.51 mi (1,632.70 km) |
| Sileby to Orvieto | 922.26 mi (1,484.24 km) |
| Sileby to Orzinuovi | 710.05 mi (1,142.71 km) |
| Sileby to Osimo | 924.83 mi (1,488.37 km) |
| Sileby to Ospitaletto | 706.39 mi (1,136.83 km) |
| Sileby to Ostuni | 1,205.93 mi (1,940.75 km) |
| Sileby to Ottaviano | 1,098.62 mi (1,768.05 km) |
| Sileby to Ovada | 713.16 mi (1,147.73 km) |
| Sileby to Ozieri | 964.38 mi (1,552.02 km) |
| Sileby to Paceco | 1,211.15 mi (1,949.16 km) |
