| Flensburg to Dendermonde | 341.18 mi (549.08 km) |
| Flensburg to Dessel | 303.80 mi (488.93 km) |
| Flensburg to Destelbergen | 348.55 mi (560.93 km) |
| Flensburg to Deurne | 321.06 mi (516.69 km) |
| Flensburg to Diepenbeek | 315.80 mi (508.23 km) |
| Flensburg to Diest | 319.65 mi (514.43 km) |
| Flensburg to Diksmuide | 376.58 mi (606.05 km) |
| Flensburg to Dilbeek | 348.17 mi (560.33 km) |
| Flensburg to Dinant | 365.11 mi (587.59 km) |
| Flensburg to Dison | 324.51 mi (522.25 km) |
| Flensburg to Dour | 384.60 mi (618.96 km) |
| Flensburg to Drongen | 352.30 mi (566.97 km) |
| Flensburg to Duffel | 326.46 mi (525.39 km) |
| Flensburg to Durbuy | 348.61 mi (561.03 km) |
| Flensburg to Ecaussinnes-Lalaing | 364.84 mi (587.15 km) |
