| Nea Ionia to Octeville | 1,486.73 mi (2,392.65 km) |
| Nea Ionia to Oignies | 1,331.13 mi (2,142.25 km) |
| Nea Ionia to Oissel | 1,366.94 mi (2,199.88 km) |
| Nea Ionia to Olivet | 1,290.23 mi (2,076.43 km) |
| Nea Ionia to Ollioules | 1,001.01 mi (1,610.96 km) |
| Nea Ionia to Olonne-sur-Mer | 1,422.48 mi (2,289.26 km) |
| Nea Ionia to Oloron-Sainte-Marie | 1,321.03 mi (2,126.00 km) |
| Nea Ionia to Onet Village | 1,179.43 mi (1,898.11 km) |
| Nea Ionia to Onnaing | 1,305.69 mi (2,101.31 km) |
| Nea Ionia to Orange | 1,069.57 mi (1,721.30 km) |
| Nea Ionia to Orchies | 1,322.03 mi (2,127.61 km) |
| Nea Ionia to Orleans | 1,290.95 mi (2,077.58 km) |
| Nea Ionia to Orly | 1,295.74 mi (2,085.30 km) |
| Nea Ionia to Ormesson-sur-Marne | 1,291.15 mi (2,077.91 km) |
| Nea Ionia to Orsay | 1,302.69 mi (2,096.48 km) |
