| Allonnes to Smolyan | 1,275.26 mi (2,052.33 km) |
| Allonnes to Sofia | 1,177.51 mi (1,895.01 km) |
| Allonnes to Sopot | 1,243.94 mi (2,001.93 km) |
| Allonnes to Sozopol | 1,386.38 mi (2,231.16 km) |
| Allonnes to Sredets | 1,365.38 mi (2,197.36 km) |
| Allonnes to Stamboliyski | 1,249.91 mi (2,011.54 km) |
| Allonnes to Stara Zagora | 1,291.71 mi (2,078.80 km) |
| Allonnes to Svilengrad | 1,337.62 mi (2,152.70 km) |
| Allonnes to Svishtov | 1,244.12 mi (2,002.22 km) |
| Allonnes to Targovishte | 1,310.97 mi (2,109.81 km) |
| Allonnes to Teteven | 1,213.90 mi (1,953.59 km) |
| Allonnes to Troyan | 1,235.52 mi (1,988.37 km) |
| Allonnes to Tryavna | 1,271.96 mi (2,047.02 km) |
| Allonnes to Tutrakan | 1,291.34 mi (2,078.22 km) |
| Allonnes to Varna | 1,373.43 mi (2,210.32 km) |
