| Piqua to Dixon (California) | 1,997.83 mi (3,215.20 km) |
| Piqua to Dixon (Illinois) | 296.95 mi (477.90 km) |
| Piqua to Dobbs Ferry (New York) | 547.32 mi (880.82 km) |
| Piqua to Doctor Phillips (Florida) | 823.61 mi (1,325.47 km) |
| Piqua to Dodge City (Kansas) | 862.24 mi (1,387.64 km) |
| Piqua to Dolton (Illinois) | 202.74 mi (326.28 km) |
| Piqua to Donna (Texas) | 1,251.55 mi (2,014.18 km) |
| Piqua to Dorado (Puerto Rico) | 1,840.50 mi (2,962.01 km) |
| Piqua to Doral (Florida) | 1,015.49 mi (1,634.27 km) |
| Piqua to Doraville (Georgia) | 431.37 mi (694.23 km) |
| Piqua to Dothan (Alabama) | 619.53 mi (997.04 km) |
| Piqua to Douglas (Arizona) | 1,535.95 mi (2,471.86 km) |
| Piqua to Douglas (Georgia) | 602.28 mi (969.27 km) |
| Piqua to Douglasville (Georgia) | 443.77 mi (714.18 km) |
| Piqua to Dover (Delaware) | 468.87 mi (754.58 km) |
