| Upminster to Karditsa | 1,337.11 mi (2,151.88 km) |
| Upminster to Kastoria | 1,256.42 mi (2,022.02 km) |
| Upminster to Katerini | 1,315.06 mi (2,116.38 km) |
| Upminster to Keratsini | 1,470.40 mi (2,366.39 km) |
| Upminster to Kerkyra | 1,251.45 mi (2,014.01 km) |
| Upminster to Kiato | 1,436.31 mi (2,311.51 km) |
| Upminster to Kifisia | 1,471.93 mi (2,368.85 km) |
| Upminster to Kilkis | 1,295.47 mi (2,084.85 km) |
| Upminster to Komotini | 1,390.73 mi (2,238.17 km) |
| Upminster to Korinthos | 1,446.47 mi (2,327.87 km) |
| Upminster to Koropi | 1,483.29 mi (2,387.13 km) |
| Upminster to Korydallos | 1,470.80 mi (2,367.02 km) |
| Upminster to Kos | 1,662.71 mi (2,675.88 km) |
| Upminster to Kozani | 1,286.32 mi (2,070.13 km) |
| Upminster to Lagos | 1,376.58 mi (2,215.39 km) |
