| Longmont to Smolyan | 5,971.84 mi (9,610.75 km) |
| Longmont to Sofia | 5,868.07 mi (9,443.75 km) |
| Longmont to Sopot | 5,913.75 mi (9,517.26 km) |
| Longmont to Sozopol | 6,013.30 mi (9,677.46 km) |
| Longmont to Sredets | 6,002.72 mi (9,660.44 km) |
| Longmont to Stamboliyski | 5,936.08 mi (9,553.19 km) |
| Longmont to Stara Zagora | 5,952.67 mi (9,579.89 km) |
| Longmont to Svilengrad | 6,006.55 mi (9,666.61 km) |
| Longmont to Svishtov | 5,877.36 mi (9,458.69 km) |
| Longmont to Targovishte | 5,933.79 mi (9,549.52 km) |
| Longmont to Teteven | 5,884.40 mi (9,470.03 km) |
| Longmont to Troyan | 5,899.72 mi (9,494.69 km) |
| Longmont to Tryavna | 5,923.86 mi (9,533.53 km) |
| Longmont to Tutrakan | 5,889.42 mi (9,478.10 km) |
| Longmont to Varna | 5,973.68 mi (9,613.71 km) |
