| Stockton-on-Tees to Smolyan | 1,484.93 mi (2,389.76 km) |
| Stockton-on-Tees to Sofia | 1,380.70 mi (2,222.02 km) |
| Stockton-on-Tees to Sopot | 1,434.57 mi (2,308.71 km) |
| Stockton-on-Tees to Sozopol | 1,554.84 mi (2,502.28 km) |
| Stockton-on-Tees to Sredets | 1,539.29 mi (2,477.25 km) |
| Stockton-on-Tees to Stamboliyski | 1,451.77 mi (2,336.40 km) |
| Stockton-on-Tees to Stara Zagora | 1,477.94 mi (2,378.51 km) |
| Stockton-on-Tees to Svilengrad | 1,530.29 mi (2,462.76 km) |
| Stockton-on-Tees to Svishtov | 1,411.23 mi (2,271.15 km) |
| Stockton-on-Tees to Targovishte | 1,474.25 mi (2,372.58 km) |
| Stockton-on-Tees to Teteven | 1,404.14 mi (2,259.74 km) |
| Stockton-on-Tees to Troyan | 1,422.18 mi (2,288.78 km) |
| Stockton-on-Tees to Tryavna | 1,451.78 mi (2,336.42 km) |
| Stockton-on-Tees to Tutrakan | 1,439.25 mi (2,316.24 km) |
| Stockton-on-Tees to Varna | 1,526.08 mi (2,455.98 km) |
