| Houston to Karditsa | 6,189.52 mi (9,961.07 km) |
| Houston to Kastoria | 6,112.53 mi (9,837.17 km) |
| Houston to Katerini | 6,173.59 mi (9,935.44 km) |
| Houston to Keratsini | 6,321.96 mi (10,174.22 km) |
| Houston to Kerkyra | 6,095.58 mi (9,809.88 km) |
| Houston to Kiato | 6,284.01 mi (10,113.14 km) |
| Houston to Kifisia | 6,324.97 mi (10,179.06 km) |
| Houston to Kilkis | 6,156.48 mi (9,907.90 km) |
| Houston to Komotini | 6,251.54 mi (10,060.88 km) |
| Houston to Korinthos | 6,294.61 mi (10,130.19 km) |
| Houston to Koropi | 6,335.57 mi (10,196.12 km) |
| Houston to Korydallos | 6,322.59 mi (10,175.23 km) |
| Houston to Kos | 6,521.44 mi (10,495.24 km) |
| Houston to Kozani | 6,143.05 mi (9,886.28 km) |
| Houston to Lagos | 6,237.83 mi (10,038.82 km) |
