| Ionia to Octeville | 3,800.10 mi (6,115.68 km) |
| Ionia to Oignies | 3,953.10 mi (6,361.90 km) |
| Ionia to Oissel | 3,917.50 mi (6,304.61 km) |
| Ionia to Olivet | 4,000.31 mi (6,437.87 km) |
| Ionia to Ollioules | 4,336.97 mi (6,979.68 km) |
| Ionia to Olonne-sur-Mer | 3,896.31 mi (6,270.50 km) |
| Ionia to Oloron-Sainte-Marie | 4,062.59 mi (6,538.10 km) |
| Ionia to Onet Village | 4,154.86 mi (6,686.61 km) |
| Ionia to Onnaing | 3,978.99 mi (6,403.57 km) |
| Ionia to Orange | 4,255.29 mi (6,848.23 km) |
| Ionia to Orchies | 3,962.49 mi (6,377.02 km) |
| Ionia to Orleans | 3,999.29 mi (6,436.24 km) |
| Ionia to Orly | 3,989.17 mi (6,419.94 km) |
| Ionia to Ormesson-sur-Marne | 3,993.43 mi (6,426.81 km) |
| Ionia to Orsay | 3,982.66 mi (6,409.48 km) |
