| Sioux City to Karditsa | 5,589.57 mi (8,995.54 km) |
| Sioux City to Kastoria | 5,507.17 mi (8,862.94 km) |
| Sioux City to Katerini | 5,562.94 mi (8,952.69 km) |
| Sioux City to Keratsini | 5,722.69 mi (9,209.78 km) |
| Sioux City to Kerkyra | 5,505.59 mi (8,860.38 km) |
| Sioux City to Kiato | 5,689.85 mi (9,156.93 km) |
| Sioux City to Kifisia | 5,723.52 mi (9,211.11 km) |
| Sioux City to Kilkis | 5,538.04 mi (8,912.62 km) |
| Sioux City to Komotini | 5,617.38 mi (9,040.30 km) |
| Sioux City to Korinthos | 5,699.91 mi (9,173.11 km) |
| Sioux City to Koropi | 5,735.21 mi (9,229.92 km) |
| Sioux City to Korydallos | 5,722.98 mi (9,210.24 km) |
| Sioux City to Kos | 5,907.61 mi (9,507.38 km) |
| Sioux City to Kozani | 5,536.38 mi (8,909.95 km) |
| Sioux City to Lagos | 5,606.19 mi (9,022.30 km) |
