| Sierning to Dimitrovgrad | 688.26 mi (1,107.64 km) |
| Sierning to Dobrich | 719.76 mi (1,158.35 km) |
| Sierning to Dospat | 653.53 mi (1,051.76 km) |
| Sierning to Dupnitsa | 585.54 mi (942.34 km) |
| Sierning to Elhovo | 721.29 mi (1,160.80 km) |
| Sierning to Etropole | 591.14 mi (951.36 km) |
| Sierning to Gabrovo | 642.02 mi (1,033.22 km) |
| Sierning to Gorna Oryahovitsa | 645.89 mi (1,039.46 km) |
| Sierning to Gotse Delchev | 642.33 mi (1,033.73 km) |
| Sierning to Harmanli | 705.19 mi (1,134.89 km) |
| Sierning to Haskovo | 692.27 mi (1,114.10 km) |
| Sierning to Ihtiman | 602.54 mi (969.70 km) |
| Sierning to Isperih | 671.42 mi (1,080.54 km) |
| Sierning to Kardzhali | 697.79 mi (1,122.99 km) |
| Sierning to Karlovo | 630.85 mi (1,015.25 km) |
