| Iona to Octeville | 4,425.31 mi (7,121.84 km) |
| Iona to Oignies | 4,613.31 mi (7,424.41 km) |
| Iona to Oissel | 4,549.43 mi (7,321.60 km) |
| Iona to Olivet | 4,609.72 mi (7,418.63 km) |
| Iona to Ollioules | 4,885.98 mi (7,863.23 km) |
| Iona to Olonne-sur-Mer | 4,463.41 mi (7,183.16 km) |
| Iona to Oloron-Sainte-Marie | 4,573.50 mi (7,360.34 km) |
| Iona to Onet Village | 4,705.69 mi (7,573.07 km) |
| Iona to Onnaing | 4,640.48 mi (7,468.14 km) |
| Iona to Orange | 4,815.16 mi (7,749.25 km) |
| Iona to Orchies | 4,623.90 mi (7,441.45 km) |
| Iona to Orleans | 4,609.44 mi (7,418.17 km) |
| Iona to Orly | 4,616.52 mi (7,429.58 km) |
| Iona to Ormesson-sur-Marne | 4,622.22 mi (7,438.75 km) |
| Iona to Orsay | 4,608.24 mi (7,416.24 km) |
