| Fern Down to Smolyan | 1,412.32 mi (2,272.91 km) |
| Fern Down to Sofia | 1,310.59 mi (2,109.18 km) |
| Fern Down to Sopot | 1,372.48 mi (2,208.80 km) |
| Fern Down to Sozopol | 1,507.06 mi (2,425.37 km) |
| Fern Down to Sredets | 1,488.17 mi (2,394.98 km) |
| Fern Down to Stamboliyski | 1,383.35 mi (2,226.29 km) |
| Fern Down to Stara Zagora | 1,418.95 mi (2,283.57 km) |
| Fern Down to Svilengrad | 1,468.15 mi (2,362.76 km) |
| Fern Down to Svishtov | 1,362.46 mi (2,192.67 km) |
| Fern Down to Targovishte | 1,428.52 mi (2,298.98 km) |
| Fern Down to Teteven | 1,341.88 mi (2,159.55 km) |
| Fern Down to Troyan | 1,362.24 mi (2,192.31 km) |
| Fern Down to Tryavna | 1,396.19 mi (2,246.95 km) |
| Fern Down to Tutrakan | 1,401.92 mi (2,256.17 km) |
| Fern Down to Varna | 1,487.10 mi (2,393.26 km) |
