| West Chicago to Oak Grove (South Carolina) | 668.84 mi (1,076.39 km) |
| West Chicago to Oak Harbor (Washington) | 1,719.68 mi (2,767.55 km) |
| West Chicago to Oak Hills (Oregon) | 1,733.14 mi (2,789.22 km) |
| West Chicago to Oak Lawn (Illinois) | 27.40 mi (44.09 km) |
| West Chicago to Oak Park (California) | 1,734.62 mi (2,791.60 km) |
| West Chicago to Oak Park (Illinois) | 22.40 mi (36.05 km) |
| West Chicago to Oak Park (Michigan) | 261.13 mi (420.25 km) |
| West Chicago to Oak Ridge (Florida) | 1,003.12 mi (1,614.37 km) |
| West Chicago to Oak Ridge (New Jersey) | 712.53 mi (1,146.71 km) |
| West Chicago to Oak Ridge (Tennessee) | 461.00 mi (741.91 km) |
| West Chicago to Oakdale (California) | 1,743.56 mi (2,805.98 km) |
| West Chicago to Oakdale (Minnesota) | 319.50 mi (514.18 km) |
| West Chicago to Oakland (California) | 1,813.30 mi (2,918.22 km) |
| West Chicago to Oakland (New Jersey) | 725.72 mi (1,167.94 km) |
| West Chicago to Oakland Park (Florida) | 1,178.87 mi (1,897.21 km) |
