| Pittsburgh to Smolyan | 5,069.01 mi (8,157.78 km) |
| Pittsburgh to Sofia | 4,965.83 mi (7,991.73 km) |
| Pittsburgh to Sopot | 5,023.93 mi (8,085.23 km) |
| Pittsburgh to Sozopol | 5,148.78 mi (8,286.16 km) |
| Pittsburgh to Sredets | 5,132.57 mi (8,260.07 km) |
| Pittsburgh to Stamboliyski | 5,038.14 mi (8,108.11 km) |
| Pittsburgh to Stara Zagora | 5,068.70 mi (8,157.28 km) |
| Pittsburgh to Svilengrad | 5,120.00 mi (8,239.84 km) |
| Pittsburgh to Svishtov | 5,004.65 mi (8,054.21 km) |
| Pittsburgh to Targovishte | 5,068.33 mi (8,156.68 km) |
| Pittsburgh to Teteven | 4,993.29 mi (8,035.93 km) |
| Pittsburgh to Troyan | 5,012.36 mi (8,066.62 km) |
| Pittsburgh to Tryavna | 5,043.60 mi (8,116.89 km) |
| Pittsburgh to Tutrakan | 5,033.83 mi (8,101.16 km) |
| Pittsburgh to Varna | 5,120.66 mi (8,240.90 km) |
