| San Diego to Octeville | 5,506.34 mi (8,861.60 km) |
| San Diego to Oignies | 5,623.07 mi (9,049.46 km) |
| San Diego to Oissel | 5,612.44 mi (9,032.35 km) |
| San Diego to Olivet | 5,708.10 mi (9,186.30 km) |
| San Diego to Ollioules | 6,071.66 mi (9,771.39 km) |
| San Diego to Olonne-sur-Mer | 5,638.20 mi (9,073.80 km) |
| San Diego to Oloron-Sainte-Marie | 5,831.35 mi (9,384.65 km) |
| San Diego to Onet Village | 5,896.06 mi (9,488.79 km) |
| San Diego to Onnaing | 5,646.39 mi (9,086.99 km) |
| San Diego to Orange | 5,986.23 mi (9,633.91 km) |
| San Diego to Orchies | 5,630.90 mi (9,062.07 km) |
| San Diego to Orleans | 5,706.60 mi (9,183.88 km) |
| San Diego to Orly | 5,683.89 mi (9,147.34 km) |
| San Diego to Ormesson-sur-Marne | 5,686.82 mi (9,152.06 km) |
| San Diego to Orsay | 5,679.11 mi (9,139.65 km) |
