| Gaithersburg to Dillenburg | 4,020.15 mi (6,469.81 km) |
| Gaithersburg to Dillingen | 4,173.13 mi (6,716.00 km) |
| Gaithersburg to Dillingen | 3,997.04 mi (6,432.62 km) |
| Gaithersburg to Dingolfing | 4,253.39 mi (6,845.16 km) |
| Gaithersburg to Dinkelsbuhl | 4,151.45 mi (6,681.11 km) |
| Gaithersburg to Dinklage | 3,960.17 mi (6,373.28 km) |
| Gaithersburg to Dinslaken | 3,935.47 mi (6,333.52 km) |
| Gaithersburg to Dippoldiswalde | 4,226.32 mi (6,801.61 km) |
| Gaithersburg to Ditzingen | 4,107.98 mi (6,611.15 km) |
| Gaithersburg to Dobeln | 4,197.75 mi (6,755.62 km) |
| Gaithersburg to Doberlug-Kirchhain | 4,199.41 mi (6,758.29 km) |
| Gaithersburg to Donaueschingen | 4,111.28 mi (6,616.47 km) |
| Gaithersburg to Donauworth | 4,182.50 mi (6,731.08 km) |
| Gaithersburg to Donzdorf | 4,142.99 mi (6,667.50 km) |
| Gaithersburg to Dorfen | 4,251.16 mi (6,841.58 km) |
