| Mountlake Terrace to Karlovo | 5,874.38 mi (9,453.90 km) |
| Mountlake Terrace to Karnobat | 5,914.33 mi (9,518.19 km) |
| Mountlake Terrace to Kavarna | 5,885.29 mi (9,471.47 km) |
| Mountlake Terrace to Kazanlak | 5,887.05 mi (9,474.30 km) |
| Mountlake Terrace to Knezha | 5,805.89 mi (9,343.67 km) |
| Mountlake Terrace to Kostinbrod | 5,833.09 mi (9,387.45 km) |
| Mountlake Terrace to Kozloduy | 5,781.17 mi (9,303.90 km) |
| Mountlake Terrace to Kyustendil | 5,856.67 mi (9,425.39 km) |
| Mountlake Terrace to Levski | 5,833.87 mi (9,388.70 km) |
| Mountlake Terrace to Lom | 5,769.07 mi (9,284.43 km) |
| Mountlake Terrace to Lovech | 5,841.14 mi (9,400.41 km) |
| Mountlake Terrace to Lukovit | 5,826.68 mi (9,377.14 km) |
| Mountlake Terrace to Lyaskovets | 5,861.64 mi (9,433.39 km) |
| Mountlake Terrace to Mezdra | 5,821.06 mi (9,368.09 km) |
| Mountlake Terrace to Momchilgrad | 5,957.20 mi (9,587.19 km) |
