| Alfena to Smolyan | 1,711.13 mi (2,753.79 km) |
| Alfena to Sofia | 1,629.86 mi (2,623.00 km) |
| Alfena to Sopot | 1,701.80 mi (2,738.78 km) |
| Alfena to Sozopol | 1,852.66 mi (2,981.56 km) |
| Alfena to Sredets | 1,828.30 mi (2,942.37 km) |
| Alfena to Stamboliyski | 1,696.22 mi (2,729.81 km) |
| Alfena to Stara Zagora | 1,749.33 mi (2,815.27 km) |
| Alfena to Svilengrad | 1,784.94 mi (2,872.59 km) |
| Alfena to Svishtov | 1,723.41 mi (2,773.56 km) |
| Alfena to Targovishte | 1,787.92 mi (2,877.38 km) |
| Alfena to Teteven | 1,675.03 mi (2,695.71 km) |
| Alfena to Troyan | 1,697.92 mi (2,732.53 km) |
| Alfena to Tryavna | 1,737.37 mi (2,796.02 km) |
| Alfena to Tutrakan | 1,782.93 mi (2,869.35 km) |
| Alfena to Varna | 1,854.70 mi (2,984.85 km) |
