| Pittsburgh to Karlovo | 5,026.45 mi (8,089.29 km) |
| Pittsburgh to Karnobat | 5,111.41 mi (8,226.02 km) |
| Pittsburgh to Kavarna | 5,126.54 mi (8,250.37 km) |
| Pittsburgh to Kazanlak | 5,050.80 mi (8,128.48 km) |
| Pittsburgh to Knezha | 4,960.70 mi (7,983.47 km) |
| Pittsburgh to Kostinbrod | 4,956.30 mi (7,976.39 km) |
| Pittsburgh to Kozloduy | 4,934.79 mi (7,941.77 km) |
| Pittsburgh to Kyustendil | 4,958.10 mi (7,979.30 km) |
| Pittsburgh to Levski | 5,007.30 mi (8,058.47 km) |
| Pittsburgh to Lom | 4,913.64 mi (7,907.74 km) |
| Pittsburgh to Lovech | 5,001.34 mi (8,048.88 km) |
| Pittsburgh to Lukovit | 4,977.01 mi (8,009.73 km) |
| Pittsburgh to Lyaskovets | 5,041.66 mi (8,113.77 km) |
| Pittsburgh to Mezdra | 4,960.91 mi (7,983.81 km) |
| Pittsburgh to Momchilgrad | 5,099.62 mi (8,207.05 km) |
