| Trondheim to Smolyan | 1,616.25 mi (2,601.10 km) |
| Trondheim to Sofia | 1,522.87 mi (2,450.82 km) |
| Trondheim to Sopot | 1,546.32 mi (2,488.57 km) |
| Trondheim to Sozopol | 1,608.85 mi (2,589.19 km) |
| Trondheim to Sredets | 1,604.72 mi (2,582.54 km) |
| Trondheim to Stamboliyski | 1,577.36 mi (2,538.52 km) |
| Trondheim to Stara Zagora | 1,574.26 mi (2,533.52 km) |
| Trondheim to Svilengrad | 1,626.71 mi (2,617.94 km) |
| Trondheim to Svishtov | 1,491.81 mi (2,400.83 km) |
| Trondheim to Targovishte | 1,535.71 mi (2,471.49 km) |
| Trondheim to Teteven | 1,521.61 mi (2,448.79 km) |
| Trondheim to Troyan | 1,530.42 mi (2,462.97 km) |
| Trondheim to Tryavna | 1,543.40 mi (2,483.86 km) |
| Trondheim to Tutrakan | 1,484.20 mi (2,388.59 km) |
| Trondheim to Varna | 1,560.71 mi (2,511.72 km) |
