| Gaithersburg to Dendermonde | 3,844.33 mi (6,186.85 km) |
| Gaithersburg to Dessel | 3,880.03 mi (6,244.30 km) |
| Gaithersburg to Destelbergen | 3,831.79 mi (6,166.67 km) |
| Gaithersburg to Deurne | 3,854.01 mi (6,202.43 km) |
| Gaithersburg to Diepenbeek | 3,900.70 mi (6,277.57 km) |
| Gaithersburg to Diest | 3,883.92 mi (6,250.57 km) |
| Gaithersburg to Diksmuide | 3,794.42 mi (6,106.53 km) |
| Gaithersburg to Dilbeek | 3,855.53 mi (6,204.88 km) |
| Gaithersburg to Dinant | 3,897.49 mi (6,272.40 km) |
| Gaithersburg to Dison | 3,925.91 mi (6,318.14 km) |
| Gaithersburg to Dour | 3,847.70 mi (6,192.28 km) |
| Gaithersburg to Drongen | 3,826.40 mi (6,158.00 km) |
| Gaithersburg to Duffel | 3,859.41 mi (6,211.11 km) |
| Gaithersburg to Durbuy | 3,917.13 mi (6,304.02 km) |
| Gaithersburg to Ecaussinnes-Lalaing | 3,859.74 mi (6,211.65 km) |
