| North Port to Orbetello | 5,144.87 mi (8,279.86 km) |
| North Port to Oria | 5,502.72 mi (8,855.76 km) |
| North Port to Oristano | 5,084.98 mi (8,183.48 km) |
| North Port to Orta Nova | 5,387.33 mi (8,670.08 km) |
| North Port to Orte | 5,199.37 mi (8,367.57 km) |
| North Port to Ortona | 5,296.33 mi (8,523.63 km) |
| North Port to Orvieto | 5,179.44 mi (8,335.50 km) |
| North Port to Orzinuovi | 5,009.54 mi (8,062.08 km) |
| North Port to Osimo | 5,221.93 mi (8,403.88 km) |
| North Port to Ospitaletto | 5,012.01 mi (8,066.04 km) |
| North Port to Ostuni | 5,493.10 mi (8,840.29 km) |
| North Port to Ottaviano | 5,343.42 mi (8,599.40 km) |
| North Port to Ovada | 4,969.43 mi (7,997.53 km) |
| North Port to Ozieri | 5,087.66 mi (8,187.80 km) |
| North Port to Paceco | 5,332.76 mi (8,582.25 km) |
