| Hardenberg to Dormagen | 101.70 mi (163.67 km) |
| Hardenberg to Dornstadt | 318.49 mi (512.56 km) |
| Hardenberg to Dorsten | 64.36 mi (103.57 km) |
| Hardenberg to Dortmund | 81.04 mi (130.43 km) |
| Hardenberg to Dorverden | 111.26 mi (179.06 km) |
| Hardenberg to Dossenheim | 233.17 mi (375.26 km) |
| Hardenberg to Dreieich | 198.87 mi (320.04 km) |
| Hardenberg to Drensteinfurt | 71.48 mi (115.03 km) |
| Hardenberg to Dresden | 321.68 mi (517.70 km) |
| Hardenberg to Drochtersen | 138.85 mi (223.46 km) |
| Hardenberg to Drolshagen | 116.78 mi (187.95 km) |
| Hardenberg to Duderstadt | 171.08 mi (275.33 km) |
| Hardenberg to Duisburg | 78.46 mi (126.27 km) |
| Hardenberg to Dulmen | 58.05 mi (93.43 km) |
| Hardenberg to Duren | 122.20 mi (196.66 km) |
