| Upminster to Kocaali | 1,614.70 mi (2,598.60 km) |
| Upminster to Kocaeli | 1,588.37 mi (2,556.24 km) |
| Upminster to Konak | 1,582.01 mi (2,545.99 km) |
| Upminster to Konakli | 1,857.92 mi (2,990.03 km) |
| Upminster to Konya | 1,821.91 mi (2,932.08 km) |
| Upminster to Koprukoy | 2,124.90 mi (3,419.69 km) |
| Upminster to Korfez | 1,579.89 mi (2,542.59 km) |
| Upminster to Korkut | 2,172.53 mi (3,496.34 km) |
| Upminster to Kose | 2,020.56 mi (3,251.78 km) |
| Upminster to Kovancilar | 2,091.84 mi (3,366.50 km) |
| Upminster to Koyulhisar | 1,939.22 mi (3,120.87 km) |
| Upminster to Kozan | 1,977.16 mi (3,181.93 km) |
| Upminster to Kozlu | 1,636.66 mi (2,633.96 km) |
| Upminster to Kozluk | 2,183.35 mi (3,513.77 km) |
| Upminster to Kucuk Dalyan | 2,049.04 mi (3,297.61 km) |
