| Natchitoches to Smolyan | 6,010.91 mi (9,673.63 km) |
| Natchitoches to Sofia | 5,907.40 mi (9,507.05 km) |
| Natchitoches to Sopot | 5,964.39 mi (9,598.75 km) |
| Natchitoches to Sozopol | 6,086.69 mi (9,795.58 km) |
| Natchitoches to Sredets | 6,071.12 mi (9,770.52 km) |
| Natchitoches to Stamboliyski | 5,979.49 mi (9,623.06 km) |
| Natchitoches to Stara Zagora | 6,008.66 mi (9,670.00 km) |
| Natchitoches to Svilengrad | 6,060.40 mi (9,753.27 km) |
| Natchitoches to Svishtov | 5,943.07 mi (9,564.45 km) |
| Natchitoches to Targovishte | 6,006.06 mi (9,665.83 km) |
| Natchitoches to Teteven | 5,933.80 mi (9,549.53 km) |
| Natchitoches to Troyan | 5,952.52 mi (9,579.66 km) |
| Natchitoches to Tryavna | 5,983.06 mi (9,628.80 km) |
| Natchitoches to Tutrakan | 5,970.13 mi (9,607.99 km) |
| Natchitoches to Varna | 6,056.95 mi (9,747.71 km) |
