| Horn Lake to Popovo | 5,704.98 mi (9,181.27 km) |
| Horn Lake to Provadia | 5,757.24 mi (9,265.38 km) |
| Horn Lake to Radnevo | 5,742.37 mi (9,241.45 km) |
| Horn Lake to Radomir | 5,616.46 mi (9,038.81 km) |
| Horn Lake to Rakitovo | 5,685.93 mi (9,150.62 km) |
| Horn Lake to Rakovski | 5,706.02 mi (9,182.96 km) |
| Horn Lake to Razgrad | 5,706.98 mi (9,184.50 km) |
| Horn Lake to Razlog | 5,666.46 mi (9,119.28 km) |
| Horn Lake to Ruse | 5,672.70 mi (9,129.32 km) |
| Horn Lake to Samokov | 5,649.49 mi (9,091.98 km) |
| Horn Lake to Sandanski | 5,673.41 mi (9,130.47 km) |
| Horn Lake to Sevlievo | 5,677.89 mi (9,137.69 km) |
| Horn Lake to Shumen | 5,734.07 mi (9,228.10 km) |
| Horn Lake to Silistra | 5,707.03 mi (9,184.58 km) |
| Horn Lake to Sliven | 5,739.68 mi (9,237.12 km) |
