| Helensburgh to Dillenburg | 647.32 mi (1,041.75 km) |
| Helensburgh to Dillingen | 820.10 mi (1,319.82 km) |
| Helensburgh to Dillingen | 663.89 mi (1,068.43 km) |
| Helensburgh to Dingolfing | 884.83 mi (1,423.99 km) |
| Helensburgh to Dinkelsbuhl | 791.16 mi (1,273.25 km) |
| Helensburgh to Dinklage | 566.46 mi (911.63 km) |
| Helensburgh to Dinslaken | 558.89 mi (899.45 km) |
| Helensburgh to Dippoldiswalde | 832.30 mi (1,339.46 km) |
| Helensburgh to Ditzingen | 762.37 mi (1,226.92 km) |
| Helensburgh to Dobeln | 803.60 mi (1,293.27 km) |
| Helensburgh to Doberlug-Kirchhain | 802.96 mi (1,292.23 km) |
| Helensburgh to Donaueschingen | 789.73 mi (1,270.95 km) |
| Helensburgh to Donauworth | 824.62 mi (1,327.10 km) |
| Helensburgh to Donzdorf | 793.37 mi (1,276.81 km) |
| Helensburgh to Dorfen | 890.10 mi (1,432.48 km) |
