| Manhattan to Orbetello | 4,201.36 mi (6,761.43 km) |
| Manhattan to Oria | 4,554.04 mi (7,329.01 km) |
| Manhattan to Oristano | 4,171.70 mi (6,713.70 km) |
| Manhattan to Orta Nova | 4,438.67 mi (7,143.34 km) |
| Manhattan to Orte | 4,252.20 mi (6,843.25 km) |
| Manhattan to Ortona | 4,343.99 mi (6,990.98 km) |
| Manhattan to Orvieto | 4,231.04 mi (6,809.21 km) |
| Manhattan to Orzinuovi | 4,046.14 mi (6,511.64 km) |
| Manhattan to Osimo | 4,263.71 mi (6,861.77 km) |
| Manhattan to Ospitaletto | 4,047.08 mi (6,513.15 km) |
| Manhattan to Ostuni | 4,542.86 mi (7,311.03 km) |
| Manhattan to Ottaviano | 4,402.43 mi (7,085.03 km) |
| Manhattan to Ovada | 4,015.25 mi (6,461.92 km) |
| Manhattan to Ozieri | 4,166.87 mi (6,705.93 km) |
| Manhattan to Paceco | 4,422.43 mi (7,117.22 km) |
