| Altadena to Octeville | 5,465.11 mi (8,795.24 km) |
| Altadena to Oignies | 5,577.13 mi (8,975.53 km) |
| Altadena to Oissel | 5,569.47 mi (8,963.20 km) |
| Altadena to Olivet | 5,666.44 mi (9,119.25 km) |
| Altadena to Ollioules | 6,032.59 mi (9,708.52 km) |
| Altadena to Olonne-sur-Mer | 5,601.38 mi (9,014.54 km) |
| Altadena to Oloron-Sainte-Marie | 5,798.17 mi (9,331.25 km) |
| Altadena to Onet Village | 5,858.42 mi (9,428.21 km) |
| Altadena to Onnaing | 5,600.08 mi (9,012.46 km) |
| Altadena to Orange | 5,946.87 mi (9,570.56 km) |
| Altadena to Orchies | 5,584.76 mi (8,987.80 km) |
| Altadena to Orleans | 5,664.88 mi (9,116.74 km) |
| Altadena to Orly | 5,640.67 mi (9,077.78 km) |
| Altadena to Ormesson-sur-Marne | 5,643.43 mi (9,082.22 km) |
| Altadena to Orsay | 5,636.12 mi (9,070.45 km) |
