| Fountain Valley to Octeville | 5,485.79 mi (8,828.53 km) |
| Fountain Valley to Oignies | 5,599.10 mi (9,010.89 km) |
| Fountain Valley to Oissel | 5,590.64 mi (8,997.26 km) |
| Fountain Valley to Olivet | 5,687.26 mi (9,152.75 km) |
| Fountain Valley to Ollioules | 6,052.72 mi (9,740.91 km) |
| Fountain Valley to Olonne-sur-Mer | 5,620.85 mi (9,045.89 km) |
| Fountain Valley to Oloron-Sainte-Marie | 5,816.64 mi (9,360.98 km) |
| Fountain Valley to Onet Village | 5,878.14 mi (9,459.95 km) |
| Fountain Valley to Onnaing | 5,622.16 mi (9,047.99 km) |
| Fountain Valley to Orange | 5,967.07 mi (9,603.07 km) |
| Fountain Valley to Orchies | 5,606.79 mi (9,023.26 km) |
| Fountain Valley to Orleans | 5,685.71 mi (9,150.27 km) |
| Fountain Valley to Orly | 5,661.91 mi (9,111.97 km) |
| Fountain Valley to Ormesson-sur-Marne | 5,664.72 mi (9,116.48 km) |
| Fountain Valley to Orsay | 5,657.30 mi (9,104.54 km) |
