| Castanet-Tolosan to Smolyan | 1,184.62 mi (1,906.46 km) |
| Castanet-Tolosan to Sofia | 1,099.54 mi (1,769.54 km) |
| Castanet-Tolosan to Sopot | 1,171.07 mi (1,884.66 km) |
| Castanet-Tolosan to Sozopol | 1,321.45 mi (2,126.66 km) |
| Castanet-Tolosan to Sredets | 1,297.49 mi (2,088.11 km) |
| Castanet-Tolosan to Stamboliyski | 1,167.48 mi (1,878.87 km) |
| Castanet-Tolosan to Stara Zagora | 1,218.94 mi (1,961.69 km) |
| Castanet-Tolosan to Svilengrad | 1,256.64 mi (2,022.37 km) |
| Castanet-Tolosan to Svishtov | 1,190.00 mi (1,915.12 km) |
| Castanet-Tolosan to Targovishte | 1,255.01 mi (2,019.75 km) |
| Castanet-Tolosan to Teteven | 1,143.65 mi (1,840.52 km) |
| Castanet-Tolosan to Troyan | 1,166.48 mi (1,877.26 km) |
| Castanet-Tolosan to Tryavna | 1,205.71 mi (1,940.40 km) |
| Castanet-Tolosan to Tutrakan | 1,248.68 mi (2,009.55 km) |
| Castanet-Tolosan to Varna | 1,321.55 mi (2,126.83 km) |
