| Firminy to Smolyan | 1,053.36 mi (1,695.22 km) |
| Firminy to Sofia | 961.42 mi (1,547.25 km) |
| Firminy to Sopot | 1,031.22 mi (1,659.58 km) |
| Firminy to Sozopol | 1,179.15 mi (1,897.66 km) |
| Firminy to Sredets | 1,156.34 mi (1,860.95 km) |
| Firminy to Stamboliyski | 1,032.07 mi (1,660.96 km) |
| Firminy to Stara Zagora | 1,079.42 mi (1,737.15 km) |
| Firminy to Svilengrad | 1,121.23 mi (1,804.44 km) |
| Firminy to Svishtov | 1,042.11 mi (1,677.12 km) |
| Firminy to Targovishte | 1,108.40 mi (1,783.80 km) |
| Firminy to Teteven | 1,002.37 mi (1,613.15 km) |
| Firminy to Troyan | 1,024.84 mi (1,649.33 km) |
| Firminy to Tryavna | 1,063.15 mi (1,710.98 km) |
| Firminy to Tutrakan | 1,096.62 mi (1,764.84 km) |
| Firminy to Varna | 1,173.71 mi (1,888.90 km) |
