| Redwood City to Karlovo | 6,524.21 mi (10,499.69 km) |
| Redwood City to Karnobat | 6,571.35 mi (10,575.57 km) |
| Redwood City to Kavarna | 6,547.92 mi (10,537.86 km) |
| Redwood City to Kazanlak | 6,538.83 mi (10,523.23 km) |
| Redwood City to Knezha | 6,455.02 mi (10,388.35 km) |
| Redwood City to Kostinbrod | 6,477.80 mi (10,425.01 km) |
| Redwood City to Kozloduy | 6,429.72 mi (10,347.63 km) |
| Redwood City to Kyustendil | 6,498.30 mi (10,458.01 km) |
| Redwood City to Levski | 6,486.22 mi (10,438.57 km) |
| Redwood City to Lom | 6,416.04 mi (10,325.62 km) |
| Redwood City to Lovech | 6,491.65 mi (10,447.30 km) |
| Redwood City to Lukovit | 6,475.47 mi (10,421.27 km) |
| Redwood City to Lyaskovets | 6,515.40 mi (10,485.52 km) |
| Redwood City to Mezdra | 6,468.16 mi (10,409.50 km) |
| Redwood City to Momchilgrad | 6,606.90 mi (10,632.78 km) |
