| San Marino to Karlovo | 6,638.02 mi (10,682.85 km) |
| San Marino to Karnobat | 6,692.79 mi (10,771.00 km) |
| San Marino to Kavarna | 6,675.94 mi (10,743.88 km) |
| San Marino to Kazanlak | 6,654.65 mi (10,709.63 km) |
| San Marino to Knezha | 6,568.49 mi (10,570.97 km) |
| San Marino to Kostinbrod | 6,586.50 mi (10,599.95 km) |
| San Marino to Kozloduy | 6,542.72 mi (10,529.49 km) |
| San Marino to Kyustendil | 6,603.73 mi (10,627.68 km) |
| San Marino to Levski | 6,602.98 mi (10,626.47 km) |
| San Marino to Lom | 6,527.46 mi (10,504.94 km) |
| San Marino to Lovech | 6,606.39 mi (10,631.95 km) |
| San Marino to Lukovit | 6,588.47 mi (10,603.11 km) |
| San Marino to Lyaskovets | 6,633.52 mi (10,675.61 km) |
| San Marino to Mezdra | 6,579.41 mi (10,588.54 km) |
| San Marino to Momchilgrad | 6,720.09 mi (10,814.94 km) |
