| Darwen to Popovo | 1,480.67 mi (2,382.90 km) |
| Darwen to Provadia | 1,534.93 mi (2,470.24 km) |
| Darwen to Radnevo | 1,515.67 mi (2,439.24 km) |
| Darwen to Radomir | 1,390.61 mi (2,237.97 km) |
| Darwen to Rakitovo | 1,459.77 mi (2,349.27 km) |
| Darwen to Rakovski | 1,479.08 mi (2,380.35 km) |
| Darwen to Razgrad | 1,483.85 mi (2,388.03 km) |
| Darwen to Razlog | 1,441.33 mi (2,319.60 km) |
| Darwen to Ruse | 1,449.37 mi (2,332.54 km) |
| Darwen to Samokov | 1,423.32 mi (2,290.61 km) |
| Darwen to Sandanski | 1,449.52 mi (2,332.77 km) |
| Darwen to Sevlievo | 1,451.41 mi (2,335.82 km) |
| Darwen to Shumen | 1,510.97 mi (2,431.68 km) |
| Darwen to Silistra | 1,488.54 mi (2,395.58 km) |
| Darwen to Sliven | 1,513.89 mi (2,436.37 km) |
