| Seattle to Karlovo | 5,885.51 mi (9,471.82 km) |
| Seattle to Karnobat | 5,925.56 mi (9,536.27 km) |
| Seattle to Kavarna | 5,896.61 mi (9,489.67 km) |
| Seattle to Kazanlak | 5,898.22 mi (9,492.26 km) |
| Seattle to Knezha | 5,817.01 mi (9,361.58 km) |
| Seattle to Kostinbrod | 5,844.15 mi (9,405.25 km) |
| Seattle to Kozloduy | 5,792.29 mi (9,321.79 km) |
| Seattle to Kyustendil | 5,867.68 mi (9,443.13 km) |
| Seattle to Levski | 5,845.04 mi (9,406.68 km) |
| Seattle to Lom | 5,780.17 mi (9,302.28 km) |
| Seattle to Lovech | 5,852.28 mi (9,418.34 km) |
| Seattle to Lukovit | 5,837.80 mi (9,395.03 km) |
| Seattle to Lyaskovets | 5,872.83 mi (9,451.40 km) |
| Seattle to Mezdra | 5,832.16 mi (9,385.95 km) |
| Seattle to Momchilgrad | 5,968.34 mi (9,605.12 km) |
