| San Lorenzo de El Escorial to Karlovo | 1,494.70 mi (2,405.49 km) |
| San Lorenzo de El Escorial to Karnobat | 1,604.94 mi (2,582.91 km) |
| San Lorenzo de El Escorial to Kavarna | 1,668.01 mi (2,684.40 km) |
| San Lorenzo de El Escorial to Kazanlak | 1,524.89 mi (2,454.07 km) |
| San Lorenzo de El Escorial to Knezha | 1,454.98 mi (2,341.56 km) |
| San Lorenzo de El Escorial to Kostinbrod | 1,413.37 mi (2,274.60 km) |
| San Lorenzo de El Escorial to Kozloduy | 1,437.03 mi (2,312.67 km) |
| San Lorenzo de El Escorial to Kyustendil | 1,388.64 mi (2,234.80 km) |
| San Lorenzo de El Escorial to Levski | 1,507.99 mi (2,426.88 km) |
| San Lorenzo de El Escorial to Lom | 1,412.27 mi (2,272.83 km) |
| San Lorenzo de El Escorial to Lovech | 1,487.91 mi (2,394.56 km) |
| San Lorenzo de El Escorial to Lukovit | 1,459.98 mi (2,349.61 km) |
| San Lorenzo de El Escorial to Lyaskovets | 1,538.37 mi (2,475.77 km) |
| San Lorenzo de El Escorial to Mezdra | 1,436.64 mi (2,312.05 km) |
| San Lorenzo de El Escorial to Momchilgrad | 1,533.75 mi (2,468.34 km) |
