| South Sioux City to Karditsa | 5,592.02 mi (8,999.48 km) |
| South Sioux City to Kastoria | 5,509.63 mi (8,866.89 km) |
| South Sioux City to Katerini | 5,565.40 mi (8,956.65 km) |
| South Sioux City to Keratsini | 5,725.14 mi (9,213.72 km) |
| South Sioux City to Kerkyra | 5,508.02 mi (8,864.30 km) |
| South Sioux City to Kiato | 5,692.30 mi (9,160.87 km) |
| South Sioux City to Kifisia | 5,725.97 mi (9,215.06 km) |
| South Sioux City to Kilkis | 5,540.51 mi (8,916.59 km) |
| South Sioux City to Komotini | 5,619.87 mi (9,044.30 km) |
| South Sioux City to Korinthos | 5,702.35 mi (9,177.04 km) |
| South Sioux City to Koropi | 5,737.66 mi (9,233.87 km) |
| South Sioux City to Korydallos | 5,725.43 mi (9,214.19 km) |
| South Sioux City to Kos | 5,910.08 mi (9,511.36 km) |
| South Sioux City to Kozani | 5,538.84 mi (8,913.90 km) |
| South Sioux City to Lagos | 5,608.68 mi (9,026.30 km) |
