| Northolt to Karditsa | 1,359.91 mi (2,188.57 km) |
| Northolt to Kastoria | 1,279.56 mi (2,059.25 km) |
| Northolt to Katerini | 1,338.53 mi (2,154.15 km) |
| Northolt to Keratsini | 1,493.20 mi (2,403.07 km) |
| Northolt to Kerkyra | 1,273.51 mi (2,049.52 km) |
| Northolt to Kiato | 1,458.78 mi (2,347.68 km) |
| Northolt to Kifisia | 1,494.86 mi (2,405.74 km) |
| Northolt to Kilkis | 1,319.41 mi (2,123.38 km) |
| Northolt to Komotini | 1,415.44 mi (2,277.93 km) |
| Northolt to Korinthos | 1,468.99 mi (2,364.11 km) |
| Northolt to Koropi | 1,506.16 mi (2,423.92 km) |
| Northolt to Korydallos | 1,493.61 mi (2,403.74 km) |
| Northolt to Kos | 1,686.29 mi (2,713.82 km) |
| Northolt to Kozani | 1,309.54 mi (2,107.50 km) |
| Northolt to Lagos | 1,401.17 mi (2,254.96 km) |
