| Piqua to Dillenburg | 4,246.01 mi (6,833.29 km) |
| Piqua to Dillingen | 4,406.49 mi (7,091.56 km) |
| Piqua to Dillingen | 4,233.19 mi (6,812.66 km) |
| Piqua to Dingolfing | 4,482.42 mi (7,213.75 km) |
| Piqua to Dinkelsbuhl | 4,382.47 mi (7,052.91 km) |
| Piqua to Dinklage | 4,175.41 mi (6,719.67 km) |
| Piqua to Dinslaken | 4,159.36 mi (6,693.84 km) |
| Piqua to Dippoldiswalde | 4,441.24 mi (7,147.49 km) |
| Piqua to Ditzingen | 4,342.65 mi (6,988.82 km) |
| Piqua to Dobeln | 4,412.54 mi (7,101.30 km) |
| Piqua to Doberlug-Kirchhain | 4,410.64 mi (7,098.24 km) |
| Piqua to Donaueschingen | 4,351.56 mi (7,003.15 km) |
| Piqua to Donauworth | 4,414.53 mi (7,104.50 km) |
| Piqua to Donzdorf | 4,376.99 mi (7,044.09 km) |
| Piqua to Dorfen | 4,482.76 mi (7,214.31 km) |
