| Amarillo to Smolyan | 6,144.27 mi (9,888.25 km) |
| Amarillo to Sofia | 6,039.98 mi (9,720.41 km) |
| Amarillo to Sopot | 6,090.37 mi (9,801.50 km) |
| Amarillo to Sozopol | 6,199.35 mi (9,976.89 km) |
| Amarillo to Sredets | 6,186.78 mi (9,956.66 km) |
| Amarillo to Stamboliyski | 6,110.00 mi (9,833.09 km) |
| Amarillo to Stara Zagora | 6,131.61 mi (9,867.87 km) |
| Amarillo to Svilengrad | 6,184.98 mi (9,953.76 km) |
| Amarillo to Svishtov | 6,059.63 mi (9,752.03 km) |
| Amarillo to Targovishte | 6,118.94 mi (9,847.49 km) |
| Amarillo to Teteven | 6,060.36 mi (9,753.20 km) |
| Amarillo to Troyan | 6,077.10 mi (9,780.15 km) |
| Amarillo to Tryavna | 6,103.88 mi (9,823.24 km) |
| Amarillo to Tutrakan | 6,077.56 mi (9,780.89 km) |
| Amarillo to Varna | 6,163.31 mi (9,918.88 km) |
