| Americus to Smolyan | 5,634.87 mi (9,068.45 km) |
| Americus to Sofia | 5,532.97 mi (8,904.46 km) |
| Americus to Sopot | 5,593.82 mi (9,002.38 km) |
| Americus to Sozopol | 5,723.89 mi (9,211.71 km) |
| Americus to Sredets | 5,706.43 mi (9,183.61 km) |
| Americus to Stamboliyski | 5,605.69 mi (9,021.48 km) |
| Americus to Stara Zagora | 5,639.67 mi (9,076.17 km) |
| Americus to Svilengrad | 5,689.75 mi (9,156.76 km) |
| Americus to Svishtov | 5,579.17 mi (8,978.81 km) |
| Americus to Targovishte | 5,644.01 mi (9,083.15 km) |
| Americus to Teteven | 5,563.16 mi (8,953.04 km) |
| Americus to Troyan | 5,583.03 mi (8,985.02 km) |
| Americus to Tryavna | 5,615.80 mi (9,037.75 km) |
| Americus to Tutrakan | 5,612.25 mi (9,032.04 km) |
| Americus to Varna | 5,698.84 mi (9,171.39 km) |
