| Palo Alto to Karlovo | 6,529.56 mi (10,508.31 km) |
| Palo Alto to Karnobat | 6,576.88 mi (10,584.47 km) |
| Palo Alto to Kavarna | 6,553.60 mi (10,547.00 km) |
| Palo Alto to Kazanlak | 6,544.23 mi (10,531.92 km) |
| Palo Alto to Knezha | 6,460.36 mi (10,396.95 km) |
| Palo Alto to Kostinbrod | 6,483.03 mi (10,433.43 km) |
| Palo Alto to Kozloduy | 6,435.05 mi (10,356.21 km) |
| Palo Alto to Kyustendil | 6,503.46 mi (10,466.31 km) |
| Palo Alto to Levski | 6,491.64 mi (10,447.29 km) |
| Palo Alto to Lom | 6,421.33 mi (10,334.14 km) |
| Palo Alto to Lovech | 6,497.03 mi (10,455.95 km) |
| Palo Alto to Lukovit | 6,480.81 mi (10,429.85 km) |
| Palo Alto to Lyaskovets | 6,520.85 mi (10,494.29 km) |
| Palo Alto to Mezdra | 6,473.45 mi (10,418.01 km) |
| Palo Alto to Momchilgrad | 6,612.25 mi (10,641.39 km) |
