| Harmanli to Dendermonde | 1,205.96 mi (1,940.81 km) |
| Harmanli to Dessel | 1,171.33 mi (1,885.07 km) |
| Harmanli to Destelbergen | 1,218.43 mi (1,960.88 km) |
| Harmanli to Deurne | 1,196.82 mi (1,926.09 km) |
| Harmanli to Diepenbeek | 1,149.99 mi (1,850.74 km) |
| Harmanli to Diest | 1,166.72 mi (1,877.65 km) |
| Harmanli to Diksmuide | 1,255.66 mi (2,020.78 km) |
| Harmanli to Dilbeek | 1,194.60 mi (1,922.52 km) |
| Harmanli to Dinant | 1,152.70 mi (1,855.08 km) |
| Harmanli to Dison | 1,124.46 mi (1,809.64 km) |
| Harmanli to Dour | 1,202.68 mi (1,935.53 km) |
| Harmanli to Drongen | 1,223.79 mi (1,969.49 km) |
| Harmanli to Duffel | 1,191.18 mi (1,917.02 km) |
| Harmanli to Durbuy | 1,132.94 mi (1,823.30 km) |
| Harmanli to Ecaussinnes-Lalaing | 1,190.37 mi (1,915.71 km) |
