| Boo to Orbetello | 1,204.19 mi (1,937.96 km) |
| Boo to Oria | 1,300.38 mi (2,092.77 km) |
| Boo to Oristano | 1,405.76 mi (2,262.36 km) |
| Boo to Orta Nova | 1,247.52 mi (2,007.69 km) |
| Boo to Orte | 1,191.26 mi (1,917.15 km) |
| Boo to Ortona | 1,183.78 mi (1,905.10 km) |
| Boo to Orvieto | 1,176.27 mi (1,893.03 km) |
| Boo to Orzinuovi | 1,021.73 mi (1,644.31 km) |
| Boo to Osimo | 1,112.41 mi (1,790.25 km) |
| Boo to Ospitaletto | 1,009.50 mi (1,624.63 km) |
| Boo to Ostuni | 1,284.31 mi (2,066.90 km) |
| Boo to Ottaviano | 1,286.34 mi (2,070.16 km) |
| Boo to Ovada | 1,090.79 mi (1,755.46 km) |
| Boo to Ozieri | 1,354.95 mi (2,180.58 km) |
| Boo to Paceco | 1,495.49 mi (2,406.75 km) |
