| Zachary to Orbetello | 5,388.50 mi (8,671.94 km) |
| Zachary to Oria | 5,740.32 mi (9,238.15 km) |
| Zachary to Oristano | 5,359.01 mi (8,624.50 km) |
| Zachary to Orta Nova | 5,625.07 mi (9,052.68 km) |
| Zachary to Orte | 5,438.96 mi (8,753.15 km) |
| Zachary to Ortona | 5,530.04 mi (8,899.73 km) |
| Zachary to Orvieto | 5,417.70 mi (8,718.94 km) |
| Zachary to Orzinuovi | 5,230.79 mi (8,418.14 km) |
| Zachary to Osimo | 5,448.95 mi (8,769.24 km) |
| Zachary to Ospitaletto | 5,231.42 mi (8,419.16 km) |
| Zachary to Ostuni | 5,728.95 mi (9,219.86 km) |
| Zachary to Ottaviano | 5,589.62 mi (8,995.63 km) |
| Zachary to Ovada | 5,201.44 mi (8,370.91 km) |
| Zachary to Ozieri | 5,354.52 mi (8,617.28 km) |
| Zachary to Paceco | 5,609.72 mi (9,027.97 km) |
