| Blue Island to Popovo | 5,275.08 mi (8,489.43 km) |
| Blue Island to Provadia | 5,325.50 mi (8,570.56 km) |
| Blue Island to Radnevo | 5,316.01 mi (8,555.29 km) |
| Blue Island to Radomir | 5,195.41 mi (8,361.20 km) |
| Blue Island to Rakitovo | 5,264.28 mi (8,472.04 km) |
| Blue Island to Rakovski | 5,281.66 mi (8,500.00 km) |
| Blue Island to Razgrad | 5,276.05 mi (8,490.98 km) |
| Blue Island to Razlog | 5,246.39 mi (8,443.26 km) |
| Blue Island to Ruse | 5,242.03 mi (8,436.23 km) |
| Blue Island to Samokov | 5,227.86 mi (8,413.42 km) |
| Blue Island to Sandanski | 5,254.71 mi (8,456.63 km) |
| Blue Island to Sevlievo | 5,251.09 mi (8,450.82 km) |
| Blue Island to Shumen | 5,303.02 mi (8,534.38 km) |
| Blue Island to Silistra | 5,273.13 mi (8,486.29 km) |
| Blue Island to Sliven | 5,311.44 mi (8,547.94 km) |
