| Piqua to Norton (Ohio) | 149.22 mi (240.14 km) |
| Piqua to Norton Shores (Michigan) | 232.44 mi (374.08 km) |
| Piqua to Norwalk (California) | 1,903.49 mi (3,063.38 km) |
| Piqua to Norwalk (Connecticut) | 571.00 mi (918.94 km) |
| Piqua to Norwalk (Iowa) | 502.29 mi (808.35 km) |
| Piqua to Norwalk (Ohio) | 114.23 mi (183.83 km) |
| Piqua to Norwich (Connecticut) | 642.07 mi (1,033.31 km) |
| Piqua to Norwood (Ohio) | 69.31 mi (111.54 km) |
| Piqua to Novato (California) | 2,042.74 mi (3,287.47 km) |
| Piqua to Novi (Michigan) | 165.55 mi (266.42 km) |
| Piqua to O'Fallon (Illinois) | 321.25 mi (517.01 km) |
| Piqua to O'Fallon (Missouri) | 357.85 mi (575.90 km) |
| Piqua to Oak Creek (Wisconsin) | 267.09 mi (429.83 km) |
| Piqua to Oak Forest (Illinois) | 209.02 mi (336.39 km) |
| Piqua to Oak Grove (Oregon) | 1,961.19 mi (3,156.22 km) |
