| Alenquer to Smolyan | 1,773.54 mi (2,854.24 km) |
| Alenquer to Sofia | 1,698.05 mi (2,732.75 km) |
| Alenquer to Sopot | 1,770.27 mi (2,848.97 km) |
| Alenquer to Sozopol | 1,921.26 mi (3,091.96 km) |
| Alenquer to Sredets | 1,896.30 mi (3,051.79 km) |
| Alenquer to Stamboliyski | 1,761.68 mi (2,835.14 km) |
| Alenquer to Stara Zagora | 1,817.00 mi (2,924.18 km) |
| Alenquer to Svilengrad | 1,849.27 mi (2,976.11 km) |
| Alenquer to Svishtov | 1,797.43 mi (2,892.68 km) |
| Alenquer to Targovishte | 1,860.38 mi (2,994.00 km) |
| Alenquer to Teteven | 1,744.82 mi (2,808.02 km) |
| Alenquer to Troyan | 1,767.68 mi (2,844.81 km) |
| Alenquer to Tryavna | 1,807.35 mi (2,908.64 km) |
| Alenquer to Tutrakan | 1,859.60 mi (2,992.74 km) |
| Alenquer to Varna | 1,927.51 mi (3,102.03 km) |
