| Hartselle to Smolyan | 5,630.91 mi (9,062.07 km) |
| Hartselle to Sofia | 5,527.89 mi (8,896.28 km) |
| Hartselle to Sopot | 5,586.38 mi (8,990.41 km) |
| Hartselle to Sozopol | 5,711.80 mi (9,192.26 km) |
| Hartselle to Sredets | 5,695.48 mi (9,165.99 km) |
| Hartselle to Stamboliyski | 5,600.28 mi (9,012.79 km) |
| Hartselle to Stara Zagora | 5,631.29 mi (9,062.69 km) |
| Hartselle to Svilengrad | 5,682.46 mi (9,145.03 km) |
| Hartselle to Svishtov | 5,567.60 mi (8,960.19 km) |
| Hartselle to Targovishte | 5,631.38 mi (9,062.84 km) |
| Hartselle to Teteven | 5,555.73 mi (8,941.09 km) |
| Hartselle to Troyan | 5,574.91 mi (8,971.95 km) |
| Hartselle to Tryavna | 5,606.33 mi (9,022.52 km) |
| Hartselle to Tutrakan | 5,597.06 mi (9,007.60 km) |
| Hartselle to Varna | 5,683.89 mi (9,147.33 km) |
