| Harrison to Smolyan | 4,790.12 mi (7,708.95 km) |
| Harrison to Sofia | 4,687.78 mi (7,544.25 km) |
| Harrison to Sopot | 4,747.87 mi (7,640.96 km) |
| Harrison to Sozopol | 4,876.73 mi (7,848.35 km) |
| Harrison to Sredets | 4,859.55 mi (7,820.68 km) |
| Harrison to Stamboliyski | 4,760.41 mi (7,661.14 km) |
| Harrison to Stara Zagora | 4,793.46 mi (7,714.33 km) |
| Harrison to Svilengrad | 4,843.88 mi (7,795.48 km) |
| Harrison to Svishtov | 4,732.10 mi (7,615.57 km) |
| Harrison to Targovishte | 4,796.71 mi (7,719.56 km) |
| Harrison to Teteven | 4,717.21 mi (7,591.61 km) |
| Harrison to Troyan | 4,736.87 mi (7,623.26 km) |
| Harrison to Tryavna | 4,769.27 mi (7,675.40 km) |
| Harrison to Tutrakan | 4,764.44 mi (7,667.62 km) |
| Harrison to Varna | 4,851.09 mi (7,807.07 km) |
