| SeaTac to Karlovo | 5,896.22 mi (9,489.05 km) |
| SeaTac to Karnobat | 5,936.42 mi (9,553.75 km) |
| SeaTac to Kavarna | 5,907.58 mi (9,507.33 km) |
| SeaTac to Kazanlak | 5,908.96 mi (9,509.56 km) |
| SeaTac to Knezha | 5,827.70 mi (9,378.77 km) |
| SeaTac to Kostinbrod | 5,854.74 mi (9,422.30 km) |
| SeaTac to Kozloduy | 5,802.96 mi (9,338.96 km) |
| SeaTac to Kyustendil | 5,878.22 mi (9,460.08 km) |
| SeaTac to Levski | 5,855.79 mi (9,423.99 km) |
| SeaTac to Lom | 5,790.80 mi (9,319.40 km) |
| SeaTac to Lovech | 5,863.00 mi (9,435.59 km) |
| SeaTac to Lukovit | 5,848.48 mi (9,412.22 km) |
| SeaTac to Lyaskovets | 5,883.61 mi (9,468.76 km) |
| SeaTac to Mezdra | 5,842.80 mi (9,403.08 km) |
| SeaTac to Momchilgrad | 5,979.05 mi (9,622.35 km) |
