| Bolton to Popovo | 1,476.99 mi (2,376.98 km) |
| Bolton to Provadia | 1,531.40 mi (2,464.55 km) |
| Bolton to Radnevo | 1,511.66 mi (2,432.78 km) |
| Bolton to Radomir | 1,386.15 mi (2,230.79 km) |
| Bolton to Rakitovo | 1,455.36 mi (2,342.17 km) |
| Bolton to Rakovski | 1,474.90 mi (2,373.63 km) |
| Bolton to Razgrad | 1,480.27 mi (2,382.27 km) |
| Bolton to Razlog | 1,436.79 mi (2,312.29 km) |
| Bolton to Ruse | 1,445.78 mi (2,326.76 km) |
| Bolton to Samokov | 1,418.91 mi (2,283.51 km) |
| Bolton to Sandanski | 1,444.86 mi (2,325.28 km) |
| Bolton to Sevlievo | 1,447.45 mi (2,329.45 km) |
| Bolton to Shumen | 1,507.39 mi (2,425.91 km) |
| Bolton to Silistra | 1,485.25 mi (2,390.28 km) |
| Bolton to Sliven | 1,510.05 mi (2,430.19 km) |
