| Castres to Popovo | 1,198.44 mi (1,928.70 km) |
| Castres to Provadia | 1,259.88 mi (2,027.59 km) |
| Castres to Radnevo | 1,197.02 mi (1,926.42 km) |
| Castres to Radomir | 1,044.53 mi (1,681.01 km) |
| Castres to Rakitovo | 1,109.40 mi (1,785.41 km) |
| Castres to Rakovski | 1,148.86 mi (1,848.92 km) |
| Castres to Razgrad | 1,210.53 mi (1,948.15 km) |
| Castres to Razlog | 1,080.15 mi (1,738.33 km) |
| Castres to Ruse | 1,179.87 mi (1,898.81 km) |
| Castres to Samokov | 1,077.71 mi (1,734.40 km) |
| Castres to Sandanski | 1,076.19 mi (1,731.96 km) |
| Castres to Sevlievo | 1,146.48 mi (1,845.07 km) |
| Castres to Shumen | 1,233.91 mi (1,985.78 km) |
| Castres to Silistra | 1,241.73 mi (1,998.37 km) |
| Castres to Sliven | 1,211.55 mi (1,949.81 km) |
