| Pittsburg to Smolyan | 6,547.96 mi (10,537.92 km) |
| Pittsburg to Sofia | 6,447.71 mi (10,376.58 km) |
| Pittsburg to Sopot | 6,482.70 mi (10,432.89 km) |
| Pittsburg to Sozopol | 6,560.01 mi (10,557.32 km) |
| Pittsburg to Sredets | 6,553.94 mi (10,547.55 km) |
| Pittsburg to Stamboliyski | 6,510.02 mi (10,476.87 km) |
| Pittsburg to Stara Zagora | 6,515.88 mi (10,486.29 km) |
| Pittsburg to Svilengrad | 6,569.53 mi (10,572.63 km) |
| Pittsburg to Svishtov | 6,435.44 mi (10,356.83 km) |
| Pittsburg to Targovishte | 6,484.41 mi (10,435.65 km) |
| Pittsburg to Teteven | 6,455.42 mi (10,388.99 km) |
| Pittsburg to Troyan | 6,467.44 mi (10,408.35 km) |
| Pittsburg to Tryavna | 6,485.52 mi (10,437.43 km) |
| Pittsburg to Tutrakan | 6,434.74 mi (10,355.72 km) |
| Pittsburg to Varna | 6,513.70 mi (10,482.79 km) |
