| Guebwiller to Smolyan | 960.09 mi (1,545.11 km) |
| Guebwiller to Sofia | 859.85 mi (1,383.80 km) |
| Guebwiller to Sopot | 924.22 mi (1,487.39 km) |
| Guebwiller to Sozopol | 1,063.92 mi (1,712.21 km) |
| Guebwiller to Sredets | 1,043.60 mi (1,679.51 km) |
| Guebwiller to Stamboliyski | 932.62 mi (1,500.91 km) |
| Guebwiller to Stara Zagora | 971.52 mi (1,563.51 km) |
| Guebwiller to Svilengrad | 1,019.03 mi (1,639.97 km) |
| Guebwiller to Svishtov | 920.68 mi (1,481.69 km) |
| Guebwiller to Targovishte | 987.44 mi (1,589.13 km) |
| Guebwiller to Teteven | 893.86 mi (1,438.53 km) |
| Guebwiller to Troyan | 914.99 mi (1,472.53 km) |
| Guebwiller to Tryavna | 950.52 mi (1,529.72 km) |
| Guebwiller to Tutrakan | 966.22 mi (1,554.98 km) |
| Guebwiller to Varna | 1,049.04 mi (1,688.26 km) |
