| Piqua to Oak Grove (South Carolina) | 459.32 mi (739.20 km) |
| Piqua to Oak Harbor (Washington) | 1,959.51 mi (3,153.53 km) |
| Piqua to Oak Hills (Oregon) | 1,970.71 mi (3,171.55 km) |
| Piqua to Oak Lawn (Illinois) | 212.60 mi (342.15 km) |
| Piqua to Oak Park (California) | 1,932.16 mi (3,109.51 km) |
| Piqua to Oak Park (Illinois) | 220.34 mi (354.61 km) |
| Piqua to Oak Park (Michigan) | 169.13 mi (272.18 km) |
| Piqua to Oak Ridge (Florida) | 822.71 mi (1,324.02 km) |
| Piqua to Oak Ridge (New Jersey) | 514.74 mi (828.39 km) |
| Piqua to Oak Ridge (Tennessee) | 289.29 mi (465.56 km) |
| Piqua to Oakdale (California) | 1,959.63 mi (3,153.73 km) |
| Piqua to Oakdale (Minnesota) | 554.97 mi (893.13 km) |
| Piqua to Oakland (California) | 2,030.80 mi (3,268.26 km) |
| Piqua to Oakland (New Jersey) | 528.07 mi (849.84 km) |
| Piqua to Oakland Park (Florida) | 993.67 mi (1,599.15 km) |
