| Trondheim to Popovo | 1,523.42 mi (2,451.71 km) |
| Trondheim to Provadia | 1,554.44 mi (2,501.63 km) |
| Trondheim to Radnevo | 1,587.44 mi (2,554.74 km) |
| Trondheim to Radomir | 1,527.80 mi (2,458.75 km) |
| Trondheim to Rakitovo | 1,580.93 mi (2,544.26 km) |
| Trondheim to Rakovski | 1,573.42 mi (2,532.18 km) |
| Trondheim to Razgrad | 1,516.13 mi (2,439.98 km) |
| Trondheim to Razlog | 1,579.14 mi (2,541.39 km) |
| Trondheim to Ruse | 1,487.96 mi (2,394.64 km) |
| Trondheim to Samokov | 1,550.10 mi (2,494.64 km) |
| Trondheim to Sandanski | 1,597.74 mi (2,571.32 km) |
| Trondheim to Sevlievo | 1,527.00 mi (2,457.47 km) |
| Trondheim to Shumen | 1,539.40 mi (2,477.43 km) |
| Trondheim to Silistra | 1,490.94 mi (2,399.43 km) |
| Trondheim to Sliven | 1,568.66 mi (2,524.51 km) |
