| South San Francisco to Octeville | 5,409.21 mi (8,705.29 km) |
| South San Francisco to Oignies | 5,505.29 mi (8,859.91 km) |
| South San Francisco to Oissel | 5,507.41 mi (8,863.32 km) |
| South San Francisco to Olivet | 5,608.19 mi (9,025.52 km) |
| South San Francisco to Ollioules | 5,981.03 mi (9,625.54 km) |
| South San Francisco to Olonne-sur-Mer | 5,559.11 mi (8,946.52 km) |
| South San Francisco to Oloron-Sainte-Marie | 5,766.62 mi (9,280.49 km) |
| South San Francisco to Onet Village | 5,812.28 mi (9,353.96 km) |
| South San Francisco to Onnaing | 5,526.93 mi (8,894.73 km) |
| South San Francisco to Orange | 5,894.75 mi (9,486.68 km) |
| South San Francisco to Orchies | 5,512.22 mi (8,871.06 km) |
| South San Francisco to Orleans | 5,606.45 mi (9,022.71 km) |
| South San Francisco to Orly | 5,577.46 mi (8,976.05 km) |
| South San Francisco to Ormesson-sur-Marne | 5,579.64 mi (8,979.56 km) |
| South San Francisco to Orsay | 5,573.67 mi (8,969.95 km) |
