| Kallithea to Octeville | 1,488.43 mi (2,395.40 km) |
| Kallithea to Oignies | 1,333.48 mi (2,146.03 km) |
| Kallithea to Oissel | 1,368.79 mi (2,202.86 km) |
| Kallithea to Olivet | 1,291.72 mi (2,078.83 km) |
| Kallithea to Ollioules | 1,001.13 mi (1,611.16 km) |
| Kallithea to Olonne-sur-Mer | 1,423.30 mi (2,290.57 km) |
| Kallithea to Oloron-Sainte-Marie | 1,320.83 mi (2,125.67 km) |
| Kallithea to Onet Village | 1,179.80 mi (1,898.70 km) |
| Kallithea to Onnaing | 1,308.09 mi (2,105.16 km) |
| Kallithea to Orange | 1,070.02 mi (1,722.02 km) |
| Kallithea to Orchies | 1,324.41 mi (2,131.44 km) |
| Kallithea to Orleans | 1,292.45 mi (2,080.00 km) |
| Kallithea to Orly | 1,297.55 mi (2,088.20 km) |
| Kallithea to Ormesson-sur-Marne | 1,292.99 mi (2,080.86 km) |
| Kallithea to Orsay | 1,304.46 mi (2,099.33 km) |
