| Diyadin to Smolyan | 1,004.00 mi (1,615.77 km) |
| Diyadin to Sofia | 1,078.54 mi (1,735.75 km) |
| Diyadin to Sopot | 1,006.40 mi (1,619.65 km) |
| Diyadin to Sozopol | 855.37 mi (1,376.59 km) |
| Diyadin to Sredets | 880.05 mi (1,416.30 km) |
| Diyadin to Stamboliyski | 1,014.41 mi (1,632.53 km) |
| Diyadin to Stara Zagora | 959.28 mi (1,543.82 km) |
| Diyadin to Svilengrad | 927.28 mi (1,492.32 km) |
| Diyadin to Svishtov | 985.88 mi (1,586.62 km) |
| Diyadin to Targovishte | 920.46 mi (1,481.33 km) |
| Diyadin to Teteven | 1,032.76 mi (1,662.07 km) |
| Diyadin to Troyan | 1,009.87 mi (1,625.23 km) |
| Diyadin to Tryavna | 970.38 mi (1,561.67 km) |
| Diyadin to Tutrakan | 930.33 mi (1,497.22 km) |
| Diyadin to Varna | 854.16 mi (1,374.63 km) |
