| Ilsenburg to Smolyan | 969.13 mi (1,559.66 km) |
| Ilsenburg to Sofia | 865.07 mi (1,392.20 km) |
| Ilsenburg to Sopot | 913.91 mi (1,470.79 km) |
| Ilsenburg to Sozopol | 1,028.03 mi (1,654.45 km) |
| Ilsenburg to Sredets | 1,013.50 mi (1,631.07 km) |
| Ilsenburg to Stamboliyski | 934.09 mi (1,503.28 km) |
| Ilsenburg to Stara Zagora | 955.45 mi (1,537.65 km) |
| Ilsenburg to Svilengrad | 1,008.64 mi (1,623.25 km) |
| Ilsenburg to Svishtov | 885.55 mi (1,425.16 km) |
| Ilsenburg to Targovishte | 947.31 mi (1,524.55 km) |
| Ilsenburg to Teteven | 883.93 mi (1,422.54 km) |
| Ilsenburg to Troyan | 900.68 mi (1,449.51 km) |
| Ilsenburg to Tryavna | 928.17 mi (1,493.74 km) |
| Ilsenburg to Tutrakan | 910.67 mi (1,465.58 km) |
| Ilsenburg to Varna | 997.49 mi (1,605.31 km) |
