| Cities | Distance |
|---|---|
| Bolu to Popovo | 329.59 mi (530.42 km) |
| Bolu to Provadia | 273.10 mi (439.52 km) |
| Bolu to Radnevo | 312.76 mi (503.34 km) |
| Bolu to Radomir | 464.04 mi (746.80 km) |
| Bolu to Rakitovo | 399.49 mi (642.91 km) |
| Bolu to Rakovski | 359.91 mi (579.22 km) |
| Bolu to Razgrad | 324.59 mi (522.39 km) |
| Bolu to Razlog | 429.72 mi (691.57 km) |
| Bolu to Ruse | 359.11 mi (577.94 km) |
| Bolu to Samokov | 430.72 mi (693.18 km) |
| Bolu to Sandanski | 436.76 mi (702.89 km) |
| Bolu to Sevlievo | 369.54 mi (594.72 km) |
| Bolu to Shumen | 297.57 mi (478.89 km) |
| Bolu to Silistra | 322.04 mi (518.27 km) |
| Bolu to Sliven | 303.46 mi (488.37 km) |