| Avon Lake to Popovo | 5,077.41 mi (8,171.31 km) |
| Avon Lake to Provadia | 5,129.74 mi (8,255.51 km) |
| Avon Lake to Radnevo | 5,114.81 mi (8,231.49 km) |
| Avon Lake to Radomir | 4,989.19 mi (8,029.32 km) |
| Avon Lake to Rakitovo | 5,058.62 mi (8,141.06 km) |
| Avon Lake to Rakovski | 5,078.54 mi (8,173.12 km) |
| Avon Lake to Razgrad | 5,079.45 mi (8,174.59 km) |
| Avon Lake to Razlog | 5,039.29 mi (8,109.95 km) |
| Avon Lake to Ruse | 5,045.16 mi (8,119.39 km) |
| Avon Lake to Samokov | 5,022.18 mi (8,082.41 km) |
| Avon Lake to Sandanski | 5,046.38 mi (8,121.37 km) |
| Avon Lake to Sevlievo | 5,050.32 mi (8,127.71 km) |
| Avon Lake to Shumen | 5,106.54 mi (8,218.18 km) |
| Avon Lake to Silistra | 5,079.67 mi (8,174.94 km) |
| Avon Lake to Sliven | 5,112.10 mi (8,227.13 km) |
