| Welling to Popovo | 1,334.51 mi (2,147.68 km) |
| Welling to Provadia | 1,391.05 mi (2,238.68 km) |
| Welling to Radnevo | 1,363.97 mi (2,195.09 km) |
| Welling to Radomir | 1,232.26 mi (1,983.13 km) |
| Welling to Rakitovo | 1,302.02 mi (2,095.40 km) |
| Welling to Rakovski | 1,324.85 mi (2,132.14 km) |
| Welling to Razgrad | 1,339.32 mi (2,155.42 km) |
| Welling to Razlog | 1,281.61 mi (2,062.56 km) |
| Welling to Ruse | 1,304.82 mi (2,099.91 km) |
| Welling to Samokov | 1,265.66 mi (2,036.88 km) |
| Welling to Sandanski | 1,288.12 mi (2,073.04 km) |
| Welling to Sevlievo | 1,300.82 mi (2,093.46 km) |
| Welling to Shumen | 1,366.29 mi (2,198.84 km) |
| Welling to Silistra | 1,348.87 mi (2,170.80 km) |
| Welling to Sliven | 1,364.89 mi (2,196.58 km) |
