| Thouare-sur-Loire to Smolyan | 1,340.98 mi (2,158.11 km) |
| Thouare-sur-Loire to Sofia | 1,245.07 mi (2,003.74 km) |
| Thouare-sur-Loire to Sopot | 1,312.75 mi (2,112.66 km) |
| Thouare-sur-Loire to Sozopol | 1,457.15 mi (2,345.05 km) |
| Thouare-sur-Loire to Sredets | 1,435.57 mi (2,310.32 km) |
| Thouare-sur-Loire to Stamboliyski | 1,317.04 mi (2,119.57 km) |
| Thouare-sur-Loire to Stara Zagora | 1,360.75 mi (2,189.91 km) |
| Thouare-sur-Loire to Svilengrad | 1,405.41 mi (2,261.79 km) |
| Thouare-sur-Loire to Svishtov | 1,316.08 mi (2,118.02 km) |
| Thouare-sur-Loire to Targovishte | 1,382.92 mi (2,225.60 km) |
| Thouare-sur-Loire to Teteven | 1,283.02 mi (2,064.82 km) |
| Thouare-sur-Loire to Troyan | 1,304.95 mi (2,100.11 km) |
| Thouare-sur-Loire to Tryavna | 1,342.04 mi (2,159.80 km) |
| Thouare-sur-Loire to Tutrakan | 1,365.30 mi (2,197.24 km) |
| Thouare-sur-Loire to Varna | 1,446.27 mi (2,327.55 km) |
