| San Ramon to Oerlinghausen | 5,560.79 mi (8,949.23 km) |
| San Ramon to Oestrich-Winkel | 5,650.71 mi (9,093.94 km) |
| San Ramon to Offenburg | 5,732.66 mi (9,225.83 km) |
| San Ramon to Oftersheim | 5,701.12 mi (9,175.06 km) |
| San Ramon to Ohrdruf | 5,677.09 mi (9,136.39 km) |
| San Ramon to Ohringen | 5,735.35 mi (9,230.16 km) |
| San Ramon to Olbernhau | 5,751.43 mi (9,256.04 km) |
| San Ramon to Olching | 5,839.94 mi (9,398.47 km) |
| San Ramon to Oldenburg | 5,484.81 mi (8,826.95 km) |
| San Ramon to Oldenburg in Holstein | 5,486.81 mi (8,830.17 km) |
| San Ramon to Olfen | 5,540.74 mi (8,916.96 km) |
| San Ramon to Olpe | 5,590.76 mi (8,997.46 km) |
| San Ramon to Olsberg | 5,589.80 mi (8,995.91 km) |
| San Ramon to Oranienburg | 5,629.79 mi (9,060.27 km) |
| San Ramon to Ortenberg | 5,659.56 mi (9,108.18 km) |
