| Piqua to Dover (New Hampshire) | 719.84 mi (1,158.47 km) |
| Piqua to Dover (New Jersey) | 510.93 mi (822.27 km) |
| Piqua to Dover (Ohio) | 147.88 mi (237.98 km) |
| Piqua to Downers Grove (Illinois) | 227.23 mi (365.70 km) |
| Piqua to Downey (California) | 1,905.20 mi (3,066.12 km) |
| Piqua to Dranesville (Virginia) | 374.63 mi (602.91 km) |
| Piqua to Draper (Utah) | 1,448.97 mi (2,331.90 km) |
| Piqua to Drexel Heights (Arizona) | 1,586.97 mi (2,553.99 km) |
| Piqua to Drexel Hill (Pennsylvania) | 472.85 mi (760.99 km) |
| Piqua to Duarte (California) | 1,889.69 mi (3,041.17 km) |
| Piqua to Dublin (California) | 2,015.51 mi (3,243.64 km) |
| Piqua to Dublin (Georgia) | 531.17 mi (854.84 km) |
| Piqua to Dublin (Ohio) | 58.10 mi (93.51 km) |
| Piqua to Dubuque (Iowa) | 372.43 mi (599.37 km) |
| Piqua to Duluth (Georgia) | 424.63 mi (683.38 km) |
