| Regensburg to Smolyan | 798.03 mi (1,284.30 km) |
| Regensburg to Sofia | 694.00 mi (1,116.88 km) |
| Regensburg to Sopot | 750.31 mi (1,207.51 km) |
| Regensburg to Sozopol | 878.13 mi (1,413.21 km) |
| Regensburg to Sredets | 860.55 mi (1,384.92 km) |
| Regensburg to Stamboliyski | 765.65 mi (1,232.20 km) |
| Regensburg to Stara Zagora | 795.07 mi (1,279.54 km) |
| Regensburg to Svilengrad | 846.37 mi (1,362.09 km) |
| Regensburg to Svishtov | 733.35 mi (1,180.22 km) |
| Regensburg to Targovishte | 798.56 mi (1,285.15 km) |
| Regensburg to Teteven | 719.69 mi (1,158.24 km) |
| Regensburg to Troyan | 738.69 mi (1,188.81 km) |
| Regensburg to Tryavna | 770.35 mi (1,239.75 km) |
| Regensburg to Tutrakan | 769.62 mi (1,238.58 km) |
| Regensburg to Varna | 855.38 mi (1,376.61 km) |
