| Castelginest to Smolyan | 1,187.61 mi (1,911.28 km) |
| Castelginest to Sofia | 1,101.87 mi (1,773.30 km) |
| Castelginest to Sopot | 1,173.29 mi (1,888.23 km) |
| Castelginest to Sozopol | 1,323.51 mi (2,129.98 km) |
| Castelginest to Sredets | 1,299.65 mi (2,091.59 km) |
| Castelginest to Stamboliyski | 1,170.10 mi (1,883.09 km) |
| Castelginest to Stara Zagora | 1,221.21 mi (1,965.35 km) |
| Castelginest to Svilengrad | 1,259.31 mi (2,026.66 km) |
| Castelginest to Svishtov | 1,191.45 mi (1,917.46 km) |
| Castelginest to Targovishte | 1,256.62 mi (2,022.34 km) |
| Castelginest to Teteven | 1,145.71 mi (1,843.85 km) |
| Castelginest to Troyan | 1,168.52 mi (1,880.56 km) |
| Castelginest to Tryavna | 1,207.69 mi (1,943.59 km) |
| Castelginest to Tutrakan | 1,249.72 mi (2,011.23 km) |
| Castelginest to Varna | 1,323.07 mi (2,129.27 km) |
