| Issum to Popovo | 1,079.68 mi (1,737.57 km) |
| Issum to Provadia | 1,134.24 mi (1,825.39 km) |
| Issum to Radnevo | 1,114.75 mi (1,794.02 km) |
| Issum to Radomir | 991.65 mi (1,595.91 km) |
| Issum to Rakitovo | 1,060.43 mi (1,706.60 km) |
| Issum to Rakovski | 1,078.62 mi (1,735.87 km) |
| Issum to Razgrad | 1,083.04 mi (1,742.99 km) |
| Issum to Razlog | 1,042.93 mi (1,678.43 km) |
| Issum to Ruse | 1,048.54 mi (1,687.47 km) |
| Issum to Samokov | 1,024.01 mi (1,647.98 km) |
| Issum to Sandanski | 1,052.02 mi (1,693.07 km) |
| Issum to Sevlievo | 1,050.40 mi (1,690.46 km) |
| Issum to Shumen | 1,110.15 mi (1,786.62 km) |
| Issum to Silistra | 1,088.77 mi (1,752.21 km) |
| Issum to Sliven | 1,112.80 mi (1,790.88 km) |
