| Cities | Distance |
|---|---|
| Siena to Devnya | 815.56 mi (1,312.51 km) |
| Siena to Dimitrovgrad | 729.08 mi (1,173.34 km) |
| Siena to Dobrich | 826.66 mi (1,330.37 km) |
| Siena to Dospat | 663.39 mi (1,067.63 km) |
| Siena to Dupnitsa | 601.54 mi (968.08 km) |
| Siena to Elhovo | 776.07 mi (1,248.97 km) |
| Siena to Etropole | 639.64 mi (1,029.40 km) |
| Siena to Gabrovo | 706.33 mi (1,136.73 km) |
| Siena to Gorna Oryahovitsa | 722.62 mi (1,162.94 km) |
| Siena to Gotse Delchev | 643.18 mi (1,035.10 km) |
| Siena to Harmanli | 745.83 mi (1,200.29 km) |
| Siena to Haskovo | 729.09 mi (1,173.35 km) |
| Siena to Ihtiman | 634.46 mi (1,021.07 km) |
| Siena to Isperih | 776.06 mi (1,248.95 km) |
| Siena to Kardzhali | 723.49 mi (1,164.34 km) |