| Holtsville to Smolyan | 4,771.12 mi (7,678.38 km) |
| Holtsville to Sofia | 4,668.97 mi (7,513.97 km) |
| Holtsville to Sopot | 4,729.42 mi (7,611.26 km) |
| Holtsville to Sozopol | 4,858.99 mi (7,819.79 km) |
| Holtsville to Sredets | 4,841.62 mi (7,791.84 km) |
| Holtsville to Stamboliyski | 4,741.64 mi (7,630.93 km) |
| Holtsville to Stara Zagora | 4,775.14 mi (7,684.85 km) |
| Holtsville to Svilengrad | 4,825.39 mi (7,765.72 km) |
| Holtsville to Svishtov | 4,714.29 mi (7,586.92 km) |
| Holtsville to Targovishte | 4,779.06 mi (7,691.16 km) |
| Holtsville to Teteven | 4,698.76 mi (7,561.92 km) |
| Holtsville to Troyan | 4,718.53 mi (7,593.74 km) |
| Holtsville to Tryavna | 4,751.13 mi (7,646.21 km) |
| Holtsville to Tutrakan | 4,747.20 mi (7,639.89 km) |
| Holtsville to Varna | 4,833.80 mi (7,779.25 km) |
