| Middle Island to Popovo | 4,753.62 mi (7,650.20 km) |
| Middle Island to Provadia | 4,808.69 mi (7,738.84 km) |
| Middle Island to Radnevo | 4,785.02 mi (7,700.75 km) |
| Middle Island to Radomir | 4,652.05 mi (7,486.74 km) |
| Middle Island to Rakitovo | 4,721.95 mi (7,599.24 km) |
| Middle Island to Rakovski | 4,745.87 mi (7,637.74 km) |
| Middle Island to Razgrad | 4,757.39 mi (7,656.28 km) |
| Middle Island to Razlog | 4,700.38 mi (7,564.53 km) |
| Middle Island to Ruse | 4,722.88 mi (7,600.74 km) |
| Middle Island to Samokov | 4,685.71 mi (7,540.92 km) |
| Middle Island to Sandanski | 4,705.45 mi (7,572.69 km) |
| Middle Island to Sevlievo | 4,721.67 mi (7,598.79 km) |
| Middle Island to Shumen | 4,784.49 mi (7,699.89 km) |
| Middle Island to Silistra | 4,762.71 mi (7,664.84 km) |
| Middle Island to Sliven | 4,785.34 mi (7,701.26 km) |
