| Potomac to Oak Grove (South Carolina) | 411.32 mi (661.96 km) |
| Potomac to Oak Harbor (Washington) | 2,323.16 mi (3,738.77 km) |
| Potomac to Oak Hills (Oregon) | 2,344.09 mi (3,772.45 km) |
| Potomac to Oak Lawn (Illinois) | 585.85 mi (942.84 km) |
| Potomac to Oak Park (California) | 2,309.84 mi (3,717.34 km) |
| Potomac to Oak Park (Illinois) | 590.91 mi (950.98 km) |
| Potomac to Oak Park (Michigan) | 393.68 mi (633.57 km) |
| Potomac to Oak Ridge (Florida) | 767.42 mi (1,235.05 km) |
| Potomac to Oak Ridge (New Jersey) | 199.51 mi (321.07 km) |
| Potomac to Oak Ridge (Tennessee) | 442.42 mi (712.01 km) |
| Potomac to Oakdale (California) | 2,342.76 mi (3,770.31 km) |
| Potomac to Oakdale (Minnesota) | 906.69 mi (1,459.17 km) |
| Potomac to Oakland (California) | 2,414.07 mi (3,885.07 km) |
| Potomac to Oakland (New Jersey) | 209.37 mi (336.95 km) |
| Potomac to Oakland Park (Florida) | 903.30 mi (1,453.72 km) |
