| Calverton to Smolyan | 5,008.33 mi (8,060.13 km) |
| Calverton to Sofia | 4,905.99 mi (7,895.42 km) |
| Calverton to Sopot | 4,966.04 mi (7,992.07 km) |
| Calverton to Sozopol | 5,094.76 mi (8,199.22 km) |
| Calverton to Sredets | 5,077.61 mi (8,171.63 km) |
| Calverton to Stamboliyski | 4,978.62 mi (8,012.31 km) |
| Calverton to Stara Zagora | 5,011.61 mi (8,065.40 km) |
| Calverton to Svilengrad | 5,062.05 mi (8,146.59 km) |
| Calverton to Svishtov | 4,950.13 mi (7,966.47 km) |
| Calverton to Targovishte | 5,014.71 mi (8,070.39 km) |
| Calverton to Teteven | 4,935.38 mi (7,942.72 km) |
| Calverton to Troyan | 4,955.03 mi (7,974.35 km) |
| Calverton to Tryavna | 4,987.39 mi (8,026.42 km) |
| Calverton to Tutrakan | 4,982.30 mi (8,018.23 km) |
| Calverton to Varna | 5,068.97 mi (8,157.72 km) |
