| Smolyan to Derecik | 1,090.44 mi (1,754.89 km) |
| Smolyan to Dereli | 716.05 mi (1,152.38 km) |
| Smolyan to Derik | 878.52 mi (1,413.84 km) |
| Smolyan to Derinkuyu | 575.26 mi (925.79 km) |
| Smolyan to Develi | 611.96 mi (984.86 km) |
| Smolyan to Dicle | 842.28 mi (1,355.53 km) |
| Smolyan to Digor | 977.71 mi (1,573.47 km) |
| Smolyan to Dikili | 208.46 mi (335.48 km) |
| Smolyan to Divrigi | 720.80 mi (1,160.01 km) |
| Smolyan to Diyadin | 1,004.00 mi (1,615.77 km) |
| Smolyan to Diyarbakir | 862.28 mi (1,387.70 km) |
| Smolyan to Doganhisar | 439.55 mi (707.39 km) |
| Smolyan to Dogansehir | 738.63 mi (1,188.72 km) |
| Smolyan to Dogubayazit | 1,024.85 mi (1,649.34 km) |
| Smolyan to Domanic | 285.42 mi (459.34 km) |
