| Montalegre to Smolyan | 1,666.06 mi (2,681.27 km) |
| Montalegre to Sofia | 1,583.53 mi (2,548.44 km) |
| Montalegre to Sopot | 1,655.34 mi (2,664.01 km) |
| Montalegre to Sozopol | 1,806.04 mi (2,906.53 km) |
| Montalegre to Sredets | 1,781.84 mi (2,867.59 km) |
| Montalegre to Stamboliyski | 1,650.46 mi (2,656.16 km) |
| Montalegre to Stara Zagora | 1,703.01 mi (2,740.73 km) |
| Montalegre to Svilengrad | 1,739.36 mi (2,799.23 km) |
| Montalegre to Svishtov | 1,675.69 mi (2,696.77 km) |
| Montalegre to Targovishte | 1,740.50 mi (2,801.06 km) |
| Montalegre to Teteven | 1,628.30 mi (2,620.50 km) |
| Montalegre to Troyan | 1,651.17 mi (2,657.30 km) |
| Montalegre to Tryavna | 1,690.53 mi (2,720.65 km) |
| Montalegre to Tutrakan | 1,734.60 mi (2,791.57 km) |
| Montalegre to Varna | 1,807.15 mi (2,908.33 km) |
