| Prior Lake to Popovo | 5,310.76 mi (8,546.84 km) |
| Prior Lake to Provadia | 5,357.70 mi (8,622.39 km) |
| Prior Lake to Radnevo | 5,357.23 mi (8,621.62 km) |
| Prior Lake to Radomir | 5,245.86 mi (8,442.40 km) |
| Prior Lake to Rakitovo | 5,313.32 mi (8,550.96 km) |
| Prior Lake to Rakovski | 5,326.31 mi (8,571.86 km) |
| Prior Lake to Razgrad | 5,309.96 mi (8,545.55 km) |
| Prior Lake to Razlog | 5,298.01 mi (8,526.32 km) |
| Prior Lake to Ruse | 5,276.63 mi (8,491.92 km) |
| Prior Lake to Samokov | 5,277.17 mi (8,492.79 km) |
| Prior Lake to Sandanski | 5,308.34 mi (8,542.94 km) |
| Prior Lake to Sevlievo | 5,292.04 mi (8,516.72 km) |
| Prior Lake to Shumen | 5,336.55 mi (8,588.34 km) |
| Prior Lake to Silistra | 5,301.98 mi (8,532.71 km) |
| Prior Lake to Sliven | 5,349.62 mi (8,609.39 km) |
