| Siegen to Devnya | 1,057.17 mi (1,701.35 km) |
| Siegen to Dimitrovgrad | 1,031.41 mi (1,659.90 km) |
| Siegen to Dobrich | 1,053.67 mi (1,695.72 km) |
| Siegen to Dospat | 997.23 mi (1,604.89 km) |
| Siegen to Dupnitsa | 929.12 mi (1,495.27 km) |
| Siegen to Elhovo | 1,063.14 mi (1,710.96 km) |
| Siegen to Etropole | 934.61 mi (1,504.11 km) |
| Siegen to Gabrovo | 983.97 mi (1,583.55 km) |
| Siegen to Gorna Oryahovitsa | 986.50 mi (1,587.61 km) |
| Siegen to Gotse Delchev | 985.70 mi (1,586.33 km) |
| Siegen to Harmanli | 1,048.24 mi (1,686.97 km) |
| Siegen to Haskovo | 1,035.59 mi (1,666.63 km) |
| Siegen to Ihtiman | 946.33 mi (1,522.98 km) |
| Siegen to Isperih | 1,007.06 mi (1,620.71 km) |
| Siegen to Kardzhali | 1,041.46 mi (1,676.07 km) |
