| Durham to Smolyan | 1,500.33 mi (2,414.55 km) |
| Durham to Sofia | 1,396.08 mi (2,246.78 km) |
| Durham to Sopot | 1,449.65 mi (2,332.99 km) |
| Durham to Sozopol | 1,569.35 mi (2,525.62 km) |
| Durham to Sredets | 1,553.93 mi (2,500.80 km) |
| Durham to Stamboliyski | 1,467.06 mi (2,361.00 km) |
| Durham to Stara Zagora | 1,492.89 mi (2,402.58 km) |
| Durham to Svilengrad | 1,545.32 mi (2,486.95 km) |
| Durham to Svishtov | 1,425.86 mi (2,294.70 km) |
| Durham to Targovishte | 1,488.73 mi (2,395.87 km) |
| Durham to Teteven | 1,419.24 mi (2,284.05 km) |
| Durham to Troyan | 1,437.20 mi (2,312.95 km) |
| Durham to Tryavna | 1,466.63 mi (2,360.32 km) |
| Durham to Tutrakan | 1,453.42 mi (2,339.06 km) |
| Durham to Varna | 1,540.26 mi (2,478.81 km) |
