| Austin to Smolyan | 6,264.61 mi (10,081.92 km) |
| Austin to Sofia | 6,160.70 mi (9,914.69 km) |
| Austin to Sopot | 6,215.98 mi (10,003.66 km) |
| Austin to Sozopol | 6,334.77 mi (10,194.83 km) |
| Austin to Sredets | 6,320.03 mi (10,171.10 km) |
| Austin to Stamboliyski | 6,232.36 mi (10,030.01 km) |
| Austin to Stara Zagora | 6,259.50 mi (10,073.69 km) |
| Austin to Svilengrad | 6,311.79 mi (10,157.84 km) |
| Austin to Svishtov | 6,191.99 mi (9,965.04 km) |
| Austin to Targovishte | 6,254.05 mi (10,064.93 km) |
| Austin to Teteven | 6,185.50 mi (9,954.60 km) |
| Austin to Troyan | 6,203.71 mi (9,983.90 km) |
| Austin to Tryavna | 6,233.25 mi (10,031.45 km) |
| Austin to Tutrakan | 6,216.48 mi (10,004.45 km) |
| Austin to Varna | 6,303.16 mi (10,143.95 km) |
