| Smolyan to Dendermonde | 1,173.94 mi (1,889.28 km) |
| Smolyan to Dessel | 1,140.90 mi (1,836.10 km) |
| Smolyan to Destelbergen | 1,186.20 mi (1,909.00 km) |
| Smolyan to Deurne | 1,165.72 mi (1,876.05 km) |
| Smolyan to Diepenbeek | 1,118.82 mi (1,800.56 km) |
| Smolyan to Diest | 1,135.43 mi (1,827.29 km) |
| Smolyan to Diksmuide | 1,222.60 mi (1,967.59 km) |
| Smolyan to Dilbeek | 1,162.08 mi (1,870.19 km) |
| Smolyan to Dinant | 1,118.96 mi (1,800.79 km) |
| Smolyan to Dison | 1,092.77 mi (1,758.64 km) |
| Smolyan to Dour | 1,168.40 mi (1,880.36 km) |
| Smolyan to Drongen | 1,191.44 mi (1,917.43 km) |
| Smolyan to Duffel | 1,159.74 mi (1,866.43 km) |
| Smolyan to Durbuy | 1,099.99 mi (1,770.26 km) |
| Smolyan to Ecaussinnes-Lalaing | 1,156.95 mi (1,861.94 km) |
