| Thornaby on Tees to Smolyan | 1,483.94 mi (2,388.18 km) |
| Thornaby on Tees to Sofia | 1,379.72 mi (2,220.45 km) |
| Thornaby on Tees to Sopot | 1,433.60 mi (2,307.16 km) |
| Thornaby on Tees to Sozopol | 1,553.91 mi (2,500.77 km) |
| Thornaby on Tees to Sredets | 1,538.35 mi (2,475.73 km) |
| Thornaby on Tees to Stamboliyski | 1,450.79 mi (2,334.83 km) |
| Thornaby on Tees to Stara Zagora | 1,476.98 mi (2,376.97 km) |
| Thornaby on Tees to Svilengrad | 1,529.32 mi (2,461.21 km) |
| Thornaby on Tees to Svishtov | 1,410.29 mi (2,269.64 km) |
| Thornaby on Tees to Targovishte | 1,473.32 mi (2,371.07 km) |
| Thornaby on Tees to Teteven | 1,403.17 mi (2,258.18 km) |
| Thornaby on Tees to Troyan | 1,421.22 mi (2,287.24 km) |
| Thornaby on Tees to Tryavna | 1,450.83 mi (2,334.88 km) |
| Thornaby on Tees to Tutrakan | 1,438.33 mi (2,314.76 km) |
| Thornaby on Tees to Varna | 1,525.16 mi (2,454.50 km) |
