| Williamsport to Oak Grove (South Carolina) | 549.69 mi (884.64 km) |
| Williamsport to Oak Harbor (Washington) | 2,254.28 mi (3,627.91 km) |
| Williamsport to Oak Hills (Oregon) | 2,287.41 mi (3,681.23 km) |
| Williamsport to Oak Lawn (Illinois) | 555.32 mi (893.71 km) |
| Williamsport to Oak Park (California) | 2,309.41 mi (3,716.64 km) |
| Williamsport to Oak Park (Illinois) | 557.32 mi (896.92 km) |
| Williamsport to Oak Park (Michigan) | 327.32 mi (526.77 km) |
| Williamsport to Oak Ridge (Florida) | 916.07 mi (1,474.27 km) |
| Williamsport to Oak Ridge (New Jersey) | 132.94 mi (213.95 km) |
| Williamsport to Oak Ridge (Tennessee) | 534.82 mi (860.71 km) |
| Williamsport to Oakdale (California) | 2,323.24 mi (3,738.89 km) |
| Williamsport to Oakdale (Minnesota) | 842.38 mi (1,355.68 km) |
| Williamsport to Oakland (California) | 2,392.83 mi (3,850.89 km) |
| Williamsport to Oakland (New Jersey) | 146.21 mi (235.31 km) |
| Williamsport to Oakland Park (Florida) | 1,055.77 mi (1,699.09 km) |
