| Iona to Orbetello | 5,157.79 mi (8,300.66 km) |
| Iona to Oria | 5,515.80 mi (8,876.82 km) |
| Iona to Oristano | 5,095.75 mi (8,200.82 km) |
| Iona to Orta Nova | 5,400.49 mi (8,691.25 km) |
| Iona to Orte | 5,212.54 mi (8,388.77 km) |
| Iona to Ortona | 5,309.84 mi (8,545.37 km) |
| Iona to Orvieto | 5,192.72 mi (8,356.87 km) |
| Iona to Orzinuovi | 5,024.13 mi (8,085.55 km) |
| Iona to Osimo | 5,235.95 mi (8,426.45 km) |
| Iona to Ospitaletto | 5,026.71 mi (8,089.71 km) |
| Iona to Ostuni | 5,506.31 mi (8,861.55 km) |
| Iona to Ottaviano | 5,356.01 mi (8,619.67 km) |
| Iona to Ovada | 4,983.31 mi (8,019.86 km) |
| Iona to Ozieri | 5,098.96 mi (8,205.98 km) |
| Iona to Paceco | 5,343.13 mi (8,598.94 km) |
