| Gaithersburg to Dormagen | 3,951.49 mi (6,359.30 km) |
| Gaithersburg to Dornstadt | 4,154.72 mi (6,686.38 km) |
| Gaithersburg to Dorsten | 3,942.05 mi (6,344.11 km) |
| Gaithersburg to Dortmund | 3,965.78 mi (6,382.30 km) |
| Gaithersburg to Dorverden | 3,997.26 mi (6,432.97 km) |
| Gaithersburg to Dossenheim | 4,073.24 mi (6,555.24 km) |
| Gaithersburg to Dreieich | 4,058.09 mi (6,530.87 km) |
| Gaithersburg to Drensteinfurt | 3,968.82 mi (6,387.20 km) |
| Gaithersburg to Dresden | 4,224.11 mi (6,798.05 km) |
| Gaithersburg to Drochtersen | 3,979.34 mi (6,404.13 km) |
| Gaithersburg to Drolshagen | 3,991.11 mi (6,423.07 km) |
| Gaithersburg to Duderstadt | 4,075.25 mi (6,558.48 km) |
| Gaithersburg to Duisburg | 3,940.20 mi (6,341.14 km) |
| Gaithersburg to Dulmen | 3,949.75 mi (6,356.51 km) |
| Gaithersburg to Duren | 3,946.39 mi (6,351.09 km) |
