| Flers to Smolyan | 1,319.10 mi (2,122.89 km) |
| Flers to Sofia | 1,220.04 mi (1,963.47 km) |
| Flers to Sopot | 1,285.32 mi (2,068.52 km) |
| Flers to Sozopol | 1,425.77 mi (2,294.56 km) |
| Flers to Sredets | 1,405.33 mi (2,261.67 km) |
| Flers to Stamboliyski | 1,292.69 mi (2,080.38 km) |
| Flers to Stara Zagora | 1,332.80 mi (2,144.93 km) |
| Flers to Svilengrad | 1,379.72 mi (2,220.45 km) |
| Flers to Svishtov | 1,282.58 mi (2,064.12 km) |
| Flers to Targovishte | 1,349.34 mi (2,171.56 km) |
| Flers to Teteven | 1,255.06 mi (2,019.82 km) |
| Flers to Troyan | 1,276.36 mi (2,054.10 km) |
| Flers to Tryavna | 1,312.16 mi (2,111.72 km) |
| Flers to Tutrakan | 1,327.68 mi (2,136.70 km) |
| Flers to Varna | 1,410.81 mi (2,270.47 km) |
