| Lake Butler to Popovo | 5,693.35 mi (9,162.56 km) |
| Lake Butler to Provadia | 5,750.34 mi (9,254.28 km) |
| Lake Butler to Radnevo | 5,719.34 mi (9,204.39 km) |
| Lake Butler to Radomir | 5,580.45 mi (8,980.87 km) |
| Lake Butler to Rakitovo | 5,650.28 mi (9,093.24 km) |
| Lake Butler to Rakovski | 5,677.83 mi (9,137.58 km) |
| Lake Butler to Razgrad | 5,698.54 mi (9,170.92 km) |
| Lake Butler to Razlog | 5,626.68 mi (9,055.27 km) |
| Lake Butler to Ruse | 5,664.07 mi (9,115.44 km) |
| Lake Butler to Samokov | 5,614.51 mi (9,035.68 km) |
| Lake Butler to Sandanski | 5,629.67 mi (9,060.08 km) |
| Lake Butler to Sevlievo | 5,657.43 mi (9,104.76 km) |
| Lake Butler to Shumen | 5,725.47 mi (9,214.26 km) |
| Lake Butler to Silistra | 5,707.90 mi (9,185.97 km) |
| Lake Butler to Sliven | 5,722.34 mi (9,209.22 km) |
