| Cities | Distance |
|---|
| Siena to Popovo | 747.92 mi (1,203.65 km) |
| Siena to Provadia | 809.12 mi (1,302.16 km) |
| Siena to Radnevo | 742.52 mi (1,194.98 km) |
| Siena to Radomir | 589.65 mi (948.94 km) |
| Siena to Rakitovo | 653.90 mi (1,052.34 km) |
| Siena to Rakovski | 694.02 mi (1,116.92 km) |
| Siena to Razgrad | 761.09 mi (1,224.85 km) |
| Siena to Razlog | 624.52 mi (1,005.07 km) |
| Siena to Ruse | 731.88 mi (1,177.84 km) |
| Siena to Samokov | 622.56 mi (1,001.91 km) |
| Siena to Sandanski | 620.65 mi (998.84 km) |
| Siena to Sevlievo | 693.98 mi (1,116.85 km) |
| Siena to Shumen | 783.38 mi (1,260.73 km) |
| Siena to Silistra | 796.13 mi (1,281.24 km) |
| Siena to Sliven | 758.31 mi (1,220.38 km) |
