| Sidcup to Popovo | 1,334.24 mi (2,147.25 km) |
| Sidcup to Provadia | 1,390.83 mi (2,238.32 km) |
| Sidcup to Radnevo | 1,363.58 mi (2,194.47 km) |
| Sidcup to Radomir | 1,231.74 mi (1,982.29 km) |
| Sidcup to Rakitovo | 1,301.50 mi (2,094.57 km) |
| Sidcup to Rakovski | 1,324.41 mi (2,131.44 km) |
| Sidcup to Razgrad | 1,339.08 mi (2,155.05 km) |
| Sidcup to Razlog | 1,281.05 mi (2,061.66 km) |
| Sidcup to Ruse | 1,304.59 mi (2,099.53 km) |
| Sidcup to Samokov | 1,265.15 mi (2,036.06 km) |
| Sidcup to Sandanski | 1,287.52 mi (2,072.07 km) |
| Sidcup to Sevlievo | 1,300.46 mi (2,092.89 km) |
| Sidcup to Shumen | 1,366.05 mi (2,198.45 km) |
| Sidcup to Silistra | 1,348.73 mi (2,170.58 km) |
| Sidcup to Sliven | 1,364.56 mi (2,196.05 km) |
