| Folsom to Karlovo | 6,426.75 mi (10,342.86 km) |
| Folsom to Karnobat | 6,474.46 mi (10,419.64 km) |
| Folsom to Kavarna | 6,451.56 mi (10,382.79 km) |
| Folsom to Kazanlak | 6,441.52 mi (10,366.63 km) |
| Folsom to Knezha | 6,357.53 mi (10,231.46 km) |
| Folsom to Kostinbrod | 6,380.00 mi (10,267.62 km) |
| Folsom to Kozloduy | 6,332.19 mi (10,190.68 km) |
| Folsom to Kyustendil | 6,400.31 mi (10,300.31 km) |
| Folsom to Levski | 6,388.97 mi (10,282.05 km) |
| Folsom to Lom | 6,318.41 mi (10,168.50 km) |
| Folsom to Lovech | 6,394.26 mi (10,290.56 km) |
| Folsom to Lukovit | 6,377.96 mi (10,264.33 km) |
| Folsom to Lyaskovets | 6,418.25 mi (10,329.17 km) |
| Folsom to Mezdra | 6,370.53 mi (10,252.37 km) |
| Folsom to Momchilgrad | 6,509.43 mi (10,475.91 km) |
