| Clay to Smolyan | 5,654.13 mi (9,099.44 km) |
| Clay to Sofia | 5,551.33 mi (8,934.00 km) |
| Clay to Sopot | 5,610.35 mi (9,028.98 km) |
| Clay to Sozopol | 5,736.81 mi (9,232.51 km) |
| Clay to Sredets | 5,720.24 mi (9,205.84 km) |
| Clay to Stamboliyski | 5,623.81 mi (9,050.65 km) |
| Clay to Stara Zagora | 5,655.48 mi (9,101.61 km) |
| Clay to Svilengrad | 5,706.42 mi (9,183.60 km) |
| Clay to Svishtov | 5,592.46 mi (9,000.19 km) |
| Clay to Targovishte | 5,656.49 mi (9,103.24 km) |
| Clay to Teteven | 5,579.69 mi (8,979.65 km) |
| Clay to Troyan | 5,599.02 mi (9,010.76 km) |
| Clay to Tryavna | 5,630.75 mi (9,061.81 km) |
| Clay to Tutrakan | 5,622.71 mi (9,048.87 km) |
| Clay to Varna | 5,709.50 mi (9,188.56 km) |
