| SeaTac to Karditsa | 6,047.82 mi (9,733.02 km) |
| SeaTac to Kastoria | 5,961.22 mi (9,593.66 km) |
| SeaTac to Katerini | 6,002.81 mi (9,660.59 km) |
| SeaTac to Keratsini | 6,172.52 mi (9,933.71 km) |
| SeaTac to Kerkyra | 5,988.44 mi (9,637.46 km) |
| SeaTac to Kiato | 6,151.64 mi (9,900.11 km) |
| SeaTac to Kifisia | 6,169.18 mi (9,928.33 km) |
| SeaTac to Kilkis | 5,964.67 mi (9,599.21 km) |
| SeaTac to Komotini | 6,006.96 mi (9,667.26 km) |
| SeaTac to Korinthos | 6,159.95 mi (9,913.48 km) |
| SeaTac to Koropi | 6,182.07 mi (9,949.08 km) |
| SeaTac to Korydallos | 6,172.14 mi (9,933.11 km) |
| SeaTac to Kos | 6,316.13 mi (10,164.83 km) |
| SeaTac to Kozani | 5,985.81 mi (9,633.24 km) |
| SeaTac to Lagos | 6,001.68 mi (9,658.77 km) |
