| Issoire to Popovo | 1,139.82 mi (1,834.36 km) |
| Issoire to Provadia | 1,201.04 mi (1,932.89 km) |
| Issoire to Radnevo | 1,146.90 mi (1,845.76 km) |
| Issoire to Radomir | 997.32 mi (1,605.04 km) |
| Issoire to Rakitovo | 1,065.04 mi (1,714.01 km) |
| Issoire to Rakovski | 1,100.42 mi (1,770.96 km) |
| Issoire to Razgrad | 1,150.18 mi (1,851.04 km) |
| Issoire to Razlog | 1,037.83 mi (1,670.22 km) |
| Issoire to Ruse | 1,117.93 mi (1,799.14 km) |
| Issoire to Samokov | 1,031.30 mi (1,659.72 km) |
| Issoire to Sandanski | 1,036.97 mi (1,668.85 km) |
| Issoire to Sevlievo | 1,091.86 mi (1,757.18 km) |
| Issoire to Shumen | 1,174.94 mi (1,890.88 km) |
| Issoire to Silistra | 1,176.29 mi (1,893.06 km) |
| Issoire to Sliven | 1,157.89 mi (1,863.44 km) |
