| Bostonia to Karlovo | 6,687.96 mi (10,763.24 km) |
| Bostonia to Karnobat | 6,745.16 mi (10,855.29 km) |
| Bostonia to Kavarna | 6,730.48 mi (10,831.67 km) |
| Bostonia to Kazanlak | 6,705.24 mi (10,791.04 km) |
| Bostonia to Knezha | 6,618.42 mi (10,651.32 km) |
| Bostonia to Kostinbrod | 6,634.85 mi (10,677.75 km) |
| Bostonia to Kozloduy | 6,592.53 mi (10,609.66 km) |
| Bostonia to Kyustendil | 6,650.98 mi (10,703.71 km) |
| Bostonia to Levski | 6,653.94 mi (10,708.48 km) |
| Bostonia to Lom | 6,576.78 mi (10,584.30 km) |
| Bostonia to Lovech | 6,656.68 mi (10,712.89 km) |
| Bostonia to Lukovit | 6,638.21 mi (10,683.17 km) |
| Bostonia to Lyaskovets | 6,684.88 mi (10,758.28 km) |
| Bostonia to Mezdra | 6,628.60 mi (10,667.70 km) |
| Bostonia to Momchilgrad | 6,769.73 mi (10,894.82 km) |
