| West Islip to Smolyan | 4,786.08 mi (7,702.46 km) |
| West Islip to Sofia | 4,683.92 mi (7,538.03 km) |
| West Islip to Sopot | 4,744.34 mi (7,635.28 km) |
| West Islip to Sozopol | 4,873.86 mi (7,843.73 km) |
| West Islip to Sredets | 4,856.51 mi (7,815.80 km) |
| West Islip to Stamboliyski | 4,756.59 mi (7,654.99 km) |
| West Islip to Stara Zagora | 4,790.06 mi (7,708.86 km) |
| West Islip to Svilengrad | 4,840.32 mi (7,789.75 km) |
| West Islip to Svishtov | 4,729.17 mi (7,610.87 km) |
| West Islip to Targovishte | 4,793.93 mi (7,715.09 km) |
| West Islip to Teteven | 4,713.68 mi (7,585.94 km) |
| West Islip to Troyan | 4,733.45 mi (7,617.75 km) |
| West Islip to Tryavna | 4,766.04 mi (7,670.19 km) |
| West Islip to Tutrakan | 4,762.04 mi (7,663.76 km) |
| West Islip to Varna | 4,848.64 mi (7,803.13 km) |
