| Castelnau-le-Lez to Smolyan | 1,064.23 mi (1,712.71 km) |
| Castelnau-le-Lez to Sofia | 978.93 mi (1,575.44 km) |
| Castelnau-le-Lez to Sopot | 1,050.47 mi (1,690.56 km) |
| Castelnau-le-Lez to Sozopol | 1,200.86 mi (1,932.59 km) |
| Castelnau-le-Lez to Sredets | 1,176.89 mi (1,894.02 km) |
| Castelnau-le-Lez to Stamboliyski | 1,046.92 mi (1,684.85 km) |
| Castelnau-le-Lez to Stara Zagora | 1,098.33 mi (1,767.59 km) |
| Castelnau-le-Lez to Svilengrad | 1,136.10 mi (1,828.37 km) |
| Castelnau-le-Lez to Svishtov | 1,069.69 mi (1,721.49 km) |
| Castelnau-le-Lez to Targovishte | 1,134.59 mi (1,825.95 km) |
| Castelnau-le-Lez to Teteven | 1,023.06 mi (1,646.45 km) |
| Castelnau-le-Lez to Troyan | 1,045.89 mi (1,683.20 km) |
| Castelnau-le-Lez to Tryavna | 1,085.14 mi (1,746.36 km) |
| Castelnau-le-Lez to Tutrakan | 1,128.70 mi (1,816.47 km) |
| Castelnau-le-Lez to Varna | 1,201.18 mi (1,933.12 km) |
