| Flat Rock to Smolyan | 5,120.81 mi (8,241.15 km) |
| Flat Rock to Sofia | 5,016.97 mi (8,074.03 km) |
| Flat Rock to Sopot | 5,072.72 mi (8,163.75 km) |
| Flat Rock to Sozopol | 5,192.92 mi (8,357.19 km) |
| Flat Rock to Sredets | 5,177.79 mi (8,332.85 km) |
| Flat Rock to Stamboliyski | 5,088.74 mi (8,189.53 km) |
| Flat Rock to Stara Zagora | 5,116.49 mi (8,234.19 km) |
| Flat Rock to Svilengrad | 5,168.60 mi (8,318.06 km) |
| Flat Rock to Svishtov | 5,049.72 mi (8,126.74 km) |
| Flat Rock to Targovishte | 5,112.23 mi (8,227.33 km) |
| Flat Rock to Teteven | 5,042.20 mi (8,114.63 km) |
| Flat Rock to Troyan | 5,060.57 mi (8,144.20 km) |
| Flat Rock to Tryavna | 5,090.47 mi (8,192.33 km) |
| Flat Rock to Tutrakan | 5,075.48 mi (8,168.20 km) |
| Flat Rock to Varna | 5,162.26 mi (8,307.85 km) |
