| West Sacramento to Oerlinghausen | 5,502.61 mi (8,855.59 km) |
| West Sacramento to Oestrich-Winkel | 5,592.76 mi (9,000.67 km) |
| West Sacramento to Offenburg | 5,674.88 mi (9,132.83 km) |
| West Sacramento to Oftersheim | 5,643.18 mi (9,081.82 km) |
| West Sacramento to Ohrdruf | 5,618.86 mi (9,042.68 km) |
| West Sacramento to Ohringen | 5,677.35 mi (9,136.81 km) |
| West Sacramento to Olbernhau | 5,693.05 mi (9,162.09 km) |
| West Sacramento to Olching | 5,781.88 mi (9,305.04 km) |
| West Sacramento to Oldenburg | 5,426.56 mi (8,733.21 km) |
| West Sacramento to Oldenburg in Holstein | 5,428.35 mi (8,736.08 km) |
| West Sacramento to Olfen | 5,482.67 mi (8,823.51 km) |
| West Sacramento to Olpe | 5,532.72 mi (8,904.06 km) |
| West Sacramento to Olsberg | 5,531.68 mi (8,902.38 km) |
| West Sacramento to Oranienburg | 5,571.30 mi (8,966.15 km) |
| West Sacramento to Ortenberg | 5,601.49 mi (9,014.72 km) |
