| Hackensack to Orbetello | 4,200.95 mi (6,760.77 km) |
| Hackensack to Oria | 4,553.47 mi (7,328.11 km) |
| Hackensack to Oristano | 4,171.82 mi (6,713.90 km) |
| Hackensack to Orta Nova | 4,438.12 mi (7,142.46 km) |
| Hackensack to Orte | 4,251.71 mi (6,842.46 km) |
| Hackensack to Ortona | 4,343.39 mi (6,990.02 km) |
| Hackensack to Orvieto | 4,230.54 mi (6,808.39 km) |
| Hackensack to Orzinuovi | 4,045.37 mi (6,510.39 km) |
| Hackensack to Osimo | 4,263.00 mi (6,860.64 km) |
| Hackensack to Ospitaletto | 4,046.28 mi (6,511.85 km) |
| Hackensack to Ostuni | 4,542.27 mi (7,310.08 km) |
| Hackensack to Ottaviano | 4,402.03 mi (7,084.39 km) |
| Hackensack to Ovada | 4,014.66 mi (6,460.98 km) |
| Hackensack to Ozieri | 4,166.87 mi (6,705.93 km) |
| Hackensack to Paceco | 4,422.56 mi (7,117.42 km) |
