| Southport to Popovo | 1,501.00 mi (2,415.62 km) |
| Southport to Provadia | 1,555.45 mi (2,503.25 km) |
| Southport to Radnevo | 1,535.55 mi (2,471.22 km) |
| Southport to Radomir | 1,409.79 mi (2,268.84 km) |
| Southport to Rakitovo | 1,479.04 mi (2,380.28 km) |
| Southport to Rakovski | 1,498.71 mi (2,411.95 km) |
| Southport to Razgrad | 1,504.31 mi (2,420.95 km) |
| Southport to Razlog | 1,460.38 mi (2,350.26 km) |
| Southport to Ruse | 1,469.82 mi (2,365.44 km) |
| Southport to Samokov | 1,442.59 mi (2,321.62 km) |
| Southport to Sandanski | 1,468.37 mi (2,363.12 km) |
| Southport to Sevlievo | 1,471.37 mi (2,367.94 km) |
| Southport to Shumen | 1,531.42 mi (2,464.59 km) |
| Southport to Silistra | 1,509.34 mi (2,429.04 km) |
| Southport to Sliven | 1,534.00 mi (2,468.74 km) |
