| Thetford to Smolyan | 1,344.47 mi (2,163.71 km) |
| Thetford to Sofia | 1,240.83 mi (1,996.92 km) |
| Thetford to Sopot | 1,298.26 mi (2,089.35 km) |
| Thetford to Sozopol | 1,425.27 mi (2,293.75 km) |
| Thetford to Sredets | 1,408.16 mi (2,266.22 km) |
| Thetford to Stamboliyski | 1,312.89 mi (2,112.89 km) |
| Thetford to Stara Zagora | 1,343.13 mi (2,161.56 km) |
| Thetford to Svilengrad | 1,394.33 mi (2,243.96 km) |
| Thetford to Svishtov | 1,280.64 mi (2,060.98 km) |
| Thetford to Targovishte | 1,345.30 mi (2,165.05 km) |
| Thetford to Teteven | 1,267.63 mi (2,040.05 km) |
| Thetford to Troyan | 1,286.74 mi (2,070.80 km) |
| Thetford to Tryavna | 1,318.34 mi (2,121.67 km) |
| Thetford to Tutrakan | 1,314.03 mi (2,114.73 km) |
| Thetford to Varna | 1,400.44 mi (2,253.80 km) |
