| Castelnaudary to Smolyan | 1,162.17 mi (1,870.33 km) |
| Castelnaudary to Sofia | 1,077.90 mi (1,734.72 km) |
| Castelnaudary to Sopot | 1,149.57 mi (1,850.05 km) |
| Castelnaudary to Sozopol | 1,300.12 mi (2,092.33 km) |
| Castelnaudary to Sredets | 1,276.04 mi (2,053.59 km) |
| Castelnaudary to Stamboliyski | 1,145.47 mi (1,843.46 km) |
| Castelnaudary to Stara Zagora | 1,197.35 mi (1,926.95 km) |
| Castelnaudary to Svilengrad | 1,234.56 mi (1,986.84 km) |
| Castelnaudary to Svishtov | 1,169.50 mi (1,882.13 km) |
| Castelnaudary to Targovishte | 1,234.28 mi (1,986.38 km) |
| Castelnaudary to Teteven | 1,122.33 mi (1,806.22 km) |
| Castelnaudary to Troyan | 1,145.19 mi (1,843.00 km) |
| Castelnaudary to Tryavna | 1,184.50 mi (1,906.26 km) |
| Castelnaudary to Tutrakan | 1,228.72 mi (1,977.43 km) |
| Castelnaudary to Varna | 1,300.94 mi (2,093.65 km) |
