| Idar-Oberstein to Smolyan | 1,006.48 mi (1,619.77 km) |
| Idar-Oberstein to Sofia | 903.41 mi (1,453.90 km) |
| Idar-Oberstein to Sopot | 962.98 mi (1,549.76 km) |
| Idar-Oberstein to Sozopol | 1,094.79 mi (1,761.89 km) |
| Idar-Oberstein to Sredets | 1,076.44 mi (1,732.36 km) |
| Idar-Oberstein to Stamboliyski | 975.87 mi (1,570.51 km) |
| Idar-Oberstein to Stara Zagora | 1,008.76 mi (1,623.45 km) |
| Idar-Oberstein to Svilengrad | 1,058.97 mi (1,704.25 km) |
| Idar-Oberstein to Svishtov | 950.04 mi (1,528.94 km) |
| Idar-Oberstein to Targovishte | 1,015.80 mi (1,634.77 km) |
| Idar-Oberstein to Teteven | 932.32 mi (1,500.42 km) |
| Idar-Oberstein to Troyan | 952.12 mi (1,532.29 km) |
| Idar-Oberstein to Tryavna | 985.13 mi (1,585.41 km) |
| Idar-Oberstein to Tutrakan | 988.39 mi (1,590.66 km) |
| Idar-Oberstein to Varna | 1,073.76 mi (1,728.06 km) |
