| Gien to Smolyan | 1,159.59 mi (1,866.17 km) |
| Gien to Sofia | 1,061.71 mi (1,708.66 km) |
| Gien to Sopot | 1,128.13 mi (1,815.55 km) |
| Gien to Sozopol | 1,270.69 mi (2,044.98 km) |
| Gien to Sredets | 1,249.63 mi (2,011.09 km) |
| Gien to Stamboliyski | 1,134.14 mi (1,825.22 km) |
| Gien to Stara Zagora | 1,175.90 mi (1,892.43 km) |
| Gien to Svilengrad | 1,221.82 mi (1,966.32 km) |
| Gien to Svishtov | 1,128.58 mi (1,816.27 km) |
| Gien to Targovishte | 1,195.44 mi (1,923.88 km) |
| Gien to Teteven | 1,098.10 mi (1,767.22 km) |
| Gien to Troyan | 1,119.72 mi (1,802.02 km) |
| Gien to Tryavna | 1,156.20 mi (1,860.73 km) |
| Gien to Tutrakan | 1,176.26 mi (1,893.01 km) |
| Gien to Varna | 1,258.07 mi (2,024.67 km) |
