| Piqua to Decatur (Alabama) | 413.77 mi (665.90 km) |
| Piqua to Decatur (Georgia) | 440.79 mi (709.38 km) |
| Piqua to Decatur (Illinois) | 249.03 mi (400.78 km) |
| Piqua to Deer Park (New York) | 575.40 mi (926.01 km) |
| Piqua to Deer Park (Texas) | 948.01 mi (1,525.68 km) |
| Piqua to Deerfield (Illinois) | 233.62 mi (375.98 km) |
| Piqua to Deerfield Beach (Florida) | 985.45 mi (1,585.94 km) |
| Piqua to Defiance (Ohio) | 78.38 mi (126.15 km) |
| Piqua to DeForest (Wisconsin) | 338.24 mi (544.35 km) |
| Piqua to DeKalb (Illinois) | 264.96 mi (426.41 km) |
| Piqua to Del Aire (California) | 1,918.34 mi (3,087.27 km) |
| Piqua to Del City (Oklahoma) | 789.28 mi (1,270.22 km) |
| Piqua to Del Rio (Texas) | 1,199.15 mi (1,929.85 km) |
| Piqua to DeLand (Florida) | 786.92 mi (1,266.42 km) |
| Piqua to Delano (California) | 1,919.01 mi (3,088.35 km) |
