| Gaillac to Smolyan | 1,164.27 mi (1,873.71 km) |
| Gaillac to Sofia | 1,077.82 mi (1,734.59 km) |
| Gaillac to Sopot | 1,149.11 mi (1,849.31 km) |
| Gaillac to Sozopol | 1,299.16 mi (2,090.79 km) |
| Gaillac to Sredets | 1,275.40 mi (2,052.56 km) |
| Gaillac to Stamboliyski | 1,146.34 mi (1,844.86 km) |
| Gaillac to Stara Zagora | 1,197.08 mi (1,926.52 km) |
| Gaillac to Svilengrad | 1,235.59 mi (1,988.50 km) |
| Gaillac to Svishtov | 1,166.54 mi (1,877.36 km) |
| Gaillac to Targovishte | 1,231.85 mi (1,982.47 km) |
| Gaillac to Teteven | 1,121.39 mi (1,804.70 km) |
| Gaillac to Troyan | 1,144.17 mi (1,841.37 km) |
| Gaillac to Tryavna | 1,183.27 mi (1,904.29 km) |
| Gaillac to Tutrakan | 1,224.46 mi (1,970.58 km) |
| Gaillac to Varna | 1,298.20 mi (2,089.25 km) |
