| San Diego to Oerlinghausen | 5,725.11 mi (9,213.68 km) |
| San Diego to Oestrich-Winkel | 5,803.62 mi (9,340.02 km) |
| San Diego to Offenburg | 5,878.15 mi (9,459.96 km) |
| San Diego to Oftersheim | 5,853.16 mi (9,419.74 km) |
| San Diego to Ohrdruf | 5,843.29 mi (9,403.87 km) |
| San Diego to Ohringen | 5,889.88 mi (9,478.85 km) |
| San Diego to Olbernhau | 5,926.07 mi (9,537.08 km) |
| San Diego to Olching | 5,996.63 mi (9,650.64 km) |
| San Diego to Oldenburg | 5,653.10 mi (9,097.78 km) |
| San Diego to Oldenburg in Holstein | 5,668.86 mi (9,123.16 km) |
| San Diego to Olfen | 5,699.62 mi (9,172.65 km) |
| San Diego to Olpe | 5,747.86 mi (9,250.28 km) |
| San Diego to Olsberg | 5,750.65 mi (9,254.78 km) |
| San Diego to Oranienburg | 5,812.86 mi (9,354.90 km) |
| San Diego to Ortenberg | 5,817.79 mi (9,362.83 km) |
