| Slidell to Smolyan | 5,952.65 mi (9,579.87 km) |
| Slidell to Sofia | 5,849.98 mi (9,414.64 km) |
| Slidell to Sopot | 5,909.28 mi (9,510.06 km) |
| Slidell to Sozopol | 6,036.19 mi (9,714.30 km) |
| Slidell to Sredets | 6,019.52 mi (9,687.48 km) |
| Slidell to Stamboliyski | 5,922.51 mi (9,531.36 km) |
| Slidell to Stara Zagora | 5,954.51 mi (9,582.86 km) |
| Slidell to Svilengrad | 6,005.34 mi (9,664.66 km) |
| Slidell to Svishtov | 5,891.78 mi (9,481.91 km) |
| Slidell to Targovishte | 5,955.90 mi (9,585.09 km) |
| Slidell to Teteven | 5,878.62 mi (9,460.72 km) |
| Slidell to Troyan | 5,898.02 mi (9,491.95 km) |
| Slidell to Tryavna | 5,929.88 mi (9,543.22 km) |
| Slidell to Tutrakan | 5,922.30 mi (9,531.02 km) |
| Slidell to Varna | 6,009.09 mi (9,670.69 km) |
