| Northdale to Orbetello | 5,113.65 mi (8,229.63 km) |
| Northdale to Oria | 5,471.13 mi (8,804.94 km) |
| Northdale to Oristano | 5,057.67 mi (8,139.53 km) |
| Northdale to Orta Nova | 5,355.64 mi (8,619.08 km) |
| Northdale to Orte | 5,167.70 mi (8,316.61 km) |
| Northdale to Ortona | 5,264.04 mi (8,471.65 km) |
| Northdale to Orvieto | 5,147.58 mi (8,284.24 km) |
| Northdale to Orzinuovi | 4,975.38 mi (8,007.11 km) |
| Northdale to Osimo | 5,188.72 mi (8,350.44 km) |
| Northdale to Ospitaletto | 4,977.63 mi (8,010.72 km) |
| Northdale to Ostuni | 5,461.28 mi (8,789.09 km) |
| Northdale to Ottaviano | 5,312.75 mi (8,550.05 km) |
| Northdale to Ovada | 4,936.56 mi (7,944.63 km) |
| Northdale to Ozieri | 5,059.40 mi (8,142.31 km) |
| Northdale to Paceco | 5,306.11 mi (8,539.36 km) |
