| Robertsville to Popovo | 4,832.04 mi (7,776.42 km) |
| Robertsville to Provadia | 4,886.99 mi (7,864.85 km) |
| Robertsville to Radnevo | 4,863.74 mi (7,827.43 km) |
| Robertsville to Radomir | 4,731.06 mi (7,613.90 km) |
| Robertsville to Rakitovo | 4,800.95 mi (7,726.38 km) |
| Robertsville to Rakovski | 4,824.71 mi (7,764.61 km) |
| Robertsville to Razgrad | 4,835.73 mi (7,782.36 km) |
| Robertsville to Razlog | 4,779.47 mi (7,691.81 km) |
| Robertsville to Ruse | 4,801.22 mi (7,726.82 km) |
| Robertsville to Samokov | 4,764.70 mi (7,668.04 km) |
| Robertsville to Sandanski | 4,784.62 mi (7,700.10 km) |
| Robertsville to Sevlievo | 4,800.32 mi (7,725.37 km) |
| Robertsville to Shumen | 4,862.83 mi (7,825.98 km) |
| Robertsville to Silistra | 4,840.79 mi (7,790.51 km) |
| Robertsville to Sliven | 4,863.92 mi (7,827.72 km) |
