| Allschwil to Smolyan | 937.47 mi (1,508.72 km) |
| Allschwil to Sofia | 837.86 mi (1,348.40 km) |
| Allschwil to Sopot | 902.93 mi (1,453.12 km) |
| Allschwil to Sozopol | 1,043.79 mi (1,679.81 km) |
| Allschwil to Sredets | 1,023.15 mi (1,646.60 km) |
| Allschwil to Stamboliyski | 910.56 mi (1,465.41 km) |
| Allschwil to Stara Zagora | 950.41 mi (1,529.54 km) |
| Allschwil to Svilengrad | 997.40 mi (1,605.16 km) |
| Allschwil to Svishtov | 901.04 mi (1,450.08 km) |
| Allschwil to Targovishte | 967.86 mi (1,557.63 km) |
| Allschwil to Teteven | 872.67 mi (1,404.43 km) |
| Allschwil to Troyan | 893.99 mi (1,438.73 km) |
| Allschwil to Tryavna | 929.90 mi (1,496.53 km) |
| Allschwil to Tutrakan | 947.81 mi (1,525.36 km) |
| Allschwil to Varna | 1,030.03 mi (1,657.67 km) |
