| Gagnef to Smolyan | 1,375.24 mi (2,213.24 km) |
| Gagnef to Sofia | 1,283.95 mi (2,066.32 km) |
| Gagnef to Sopot | 1,304.47 mi (2,099.34 km) |
| Gagnef to Sozopol | 1,363.00 mi (2,193.54 km) |
| Gagnef to Sredets | 1,359.42 mi (2,187.78 km) |
| Gagnef to Stamboliyski | 1,336.29 mi (2,150.56 km) |
| Gagnef to Stara Zagora | 1,331.00 mi (2,142.04 km) |
| Gagnef to Svilengrad | 1,383.03 mi (2,225.78 km) |
| Gagnef to Svishtov | 1,248.24 mi (2,008.86 km) |
| Gagnef to Targovishte | 1,290.65 mi (2,077.11 km) |
| Gagnef to Teteven | 1,280.49 mi (2,060.75 km) |
| Gagnef to Troyan | 1,288.46 mi (2,073.57 km) |
| Gagnef to Tryavna | 1,300.10 mi (2,092.31 km) |
| Gagnef to Tutrakan | 1,238.66 mi (1,993.44 km) |
| Gagnef to Varna | 1,314.33 mi (2,115.20 km) |
