| Upminster to Oak Harbor (Washington) | 4,759.84 mi (7,660.22 km) |
| Upminster to Oak Hills (Oregon) | 4,923.70 mi (7,923.94 km) |
| Upminster to Oak Lawn (Illinois) | 3,972.75 mi (6,393.52 km) |
| Upminster to Oak Park (California) | 5,459.35 mi (8,785.97 km) |
| Upminster to Oak Park (Illinois) | 3,966.07 mi (6,382.77 km) |
| Upminster to Oak Park (Michigan) | 3,763.03 mi (6,056.02 km) |
| Upminster to Oak Ridge (Florida) | 4,359.11 mi (7,015.31 km) |
| Upminster to Oak Ridge (New Jersey) | 3,481.68 mi (5,603.22 km) |
| Upminster to Oak Ridge (Tennessee) | 4,109.84 mi (6,614.15 km) |
| Upminster to Oakdale (California) | 5,316.96 mi (8,556.82 km) |
| Upminster to Oakdale (Minnesota) | 4,011.56 mi (6,455.98 km) |
| Upminster to Oakland (California) | 5,355.84 mi (8,619.39 km) |
| Upminster to Oakland (New Jersey) | 3,471.31 mi (5,586.54 km) |
| Upminster to Oakland Park (Florida) | 4,421.24 mi (7,115.29 km) |
| Upminster to Oakleaf Plantation (Florida) | 4,292.06 mi (6,907.40 km) |
