| Oer-Erkenschwick to Smolyan | 1,076.29 mi (1,732.13 km) |
| Oer-Erkenschwick to Sofia | 972.06 mi (1,564.39 km) |
| Oer-Erkenschwick to Sopot | 1,026.25 mi (1,651.58 km) |
| Oer-Erkenschwick to Sozopol | 1,148.73 mi (1,848.70 km) |
| Oer-Erkenschwick to Sredets | 1,132.51 mi (1,822.60 km) |
| Oer-Erkenschwick to Stamboliyski | 1,043.16 mi (1,678.81 km) |
| Oer-Erkenschwick to Stara Zagora | 1,069.95 mi (1,721.92 km) |
| Oer-Erkenschwick to Svilengrad | 1,122.07 mi (1,805.80 km) |
| Oer-Erkenschwick to Svishtov | 1,004.56 mi (1,616.69 km) |
| Oer-Erkenschwick to Targovishte | 1,068.36 mi (1,719.35 km) |
| Oer-Erkenschwick to Teteven | 995.77 mi (1,602.53 km) |
| Oer-Erkenschwick to Troyan | 1,014.02 mi (1,631.91 km) |
| Oer-Erkenschwick to Tryavna | 1,044.15 mi (1,680.39 km) |
| Oer-Erkenschwick to Tutrakan | 1,035.30 mi (1,666.16 km) |
| Oer-Erkenschwick to Varna | 1,121.96 mi (1,805.62 km) |
