| Piqua to Dormagen | 4,177.87 mi (6,723.63 km) |
| Piqua to Dornstadt | 4,389.60 mi (7,064.38 km) |
| Piqua to Dorsten | 4,165.02 mi (6,702.95 km) |
| Piqua to Dortmund | 4,188.70 mi (6,741.06 km) |
| Piqua to Dorverden | 4,209.56 mi (6,774.63 km) |
| Piqua to Dossenheim | 4,305.35 mi (6,928.79 km) |
| Piqua to Dreieich | 4,287.20 mi (6,899.58 km) |
| Piqua to Drensteinfurt | 4,189.71 mi (6,742.68 km) |
| Piqua to Dresden | 4,438.06 mi (7,142.36 km) |
| Piqua to Drochtersen | 4,186.47 mi (6,737.47 km) |
| Piqua to Drolshagen | 4,216.22 mi (6,785.34 km) |
| Piqua to Duderstadt | 4,293.25 mi (6,909.32 km) |
| Piqua to Duisburg | 4,164.79 mi (6,702.58 km) |
| Piqua to Dulmen | 4,171.22 mi (6,712.93 km) |
| Piqua to Duren | 4,175.02 mi (6,719.04 km) |
