| Houston to Islahiye | 6,873.44 mi (11,061.74 km) |
| Houston to Isparta | 6,609.04 mi (10,636.22 km) |
| Houston to Istanbul | 6,390.46 mi (10,284.46 km) |
| Houston to Izmir | 6,443.91 mi (10,370.47 km) |
| Houston to Kadinhani | 6,648.53 mi (10,699.78 km) |
| Houston to Kadirli | 6,836.17 mi (11,001.75 km) |
| Houston to Kagithane | 6,388.08 mi (10,280.63 km) |
| Houston to Kahramanmaras | 6,854.90 mi (11,031.89 km) |
| Houston to Kahta | 6,903.72 mi (11,110.47 km) |
| Houston to Kaman | 6,647.99 mi (10,698.91 km) |
| Houston to Kangal | 6,783.72 mi (10,917.34 km) |
| Houston to Kapakli | 6,338.09 mi (10,200.17 km) |
| Houston to Karaagac | 6,879.13 mi (11,070.90 km) |
| Houston to Karaagac | 6,339.05 mi (10,201.71 km) |
| Houston to Karabuk | 6,515.48 mi (10,485.65 km) |
