| Piqua to Missouri City (Texas) | 970.44 mi (1,561.77 km) |
| Piqua to Mitchell (South Dakota) | 749.51 mi (1,206.23 km) |
| Piqua to Mitchellville (Maryland) | 404.52 mi (651.01 km) |
| Piqua to Moberly (Missouri) | 437.75 mi (704.49 km) |
| Piqua to Mobile (Alabama) | 689.64 mi (1,109.87 km) |
| Piqua to Modesto (California) | 1,970.25 mi (3,170.81 km) |
| Piqua to Mokena (Illinois) | 212.58 mi (342.11 km) |
| Piqua to Moline (Illinois) | 339.32 mi (546.09 km) |
| Piqua to Moncks Corner (South Carolina) | 535.99 mi (862.60 km) |
| Piqua to Monfort Heights (Ohio) | 69.64 mi (112.07 km) |
| Piqua to Monmouth (Oregon) | 1,992.66 mi (3,206.87 km) |
| Piqua to Monroe (Georgia) | 439.82 mi (707.82 km) |
| Piqua to Monroe (Louisiana) | 683.61 mi (1,100.17 km) |
| Piqua to Monroe (Michigan) | 129.90 mi (209.06 km) |
| Piqua to Monroe (North Carolina) | 408.61 mi (657.59 km) |
