| West Sacramento to Octeville | 5,331.07 mi (8,579.53 km) |
| West Sacramento to Oignies | 5,427.40 mi (8,734.55 km) |
| West Sacramento to Oissel | 5,429.35 mi (8,737.69 km) |
| West Sacramento to Olivet | 5,530.08 mi (8,899.81 km) |
| West Sacramento to Ollioules | 5,902.87 mi (9,499.75 km) |
| West Sacramento to Olonne-sur-Mer | 5,480.90 mi (8,820.66 km) |
| West Sacramento to Oloron-Sainte-Marie | 5,688.45 mi (9,154.68 km) |
| West Sacramento to Onet Village | 5,734.08 mi (9,228.12 km) |
| West Sacramento to Onnaing | 5,449.06 mi (8,769.42 km) |
| West Sacramento to Orange | 5,816.59 mi (9,360.90 km) |
| West Sacramento to Orchies | 5,434.34 mi (8,745.73 km) |
| West Sacramento to Orleans | 5,528.34 mi (8,897.01 km) |
| West Sacramento to Orly | 5,499.41 mi (8,850.45 km) |
| West Sacramento to Ormesson-sur-Marne | 5,501.60 mi (8,853.97 km) |
| West Sacramento to Orsay | 5,495.61 mi (8,844.33 km) |
