| San Mateo to Oerlinghausen | 5,583.30 mi (8,985.46 km) |
| San Mateo to Oestrich-Winkel | 5,673.52 mi (9,130.64 km) |
| San Mateo to Offenburg | 5,755.65 mi (9,262.82 km) |
| San Mateo to Oftersheim | 5,723.94 mi (9,211.79 km) |
| San Mateo to Ohrdruf | 5,699.53 mi (9,172.51 km) |
| San Mateo to Ohringen | 5,758.10 mi (9,266.77 km) |
| San Mateo to Olbernhau | 5,773.61 mi (9,291.74 km) |
| San Mateo to Olching | 5,862.62 mi (9,434.97 km) |
| San Mateo to Oldenburg | 5,507.22 mi (8,863.02 km) |
| San Mateo to Oldenburg in Holstein | 5,508.81 mi (8,865.57 km) |
| San Mateo to Olfen | 5,563.41 mi (8,953.44 km) |
| San Mateo to Olpe | 5,613.47 mi (9,034.00 km) |
| San Mateo to Olsberg | 5,612.40 mi (9,032.29 km) |
| San Mateo to Oranienburg | 5,651.73 mi (9,095.58 km) |
| San Mateo to Ortenberg | 5,682.22 mi (9,144.65 km) |
