| Northolt to Glyka Nera | 1,500.62 mi (2,415.02 km) |
| Northolt to Grevena | 1,306.42 mi (2,102.48 km) |
| Northolt to Ialysos | 1,743.18 mi (2,805.38 km) |
| Northolt to Ilion | 1,492.98 mi (2,402.72 km) |
| Northolt to Ilioupoli | 1,499.87 mi (2,413.80 km) |
| Northolt to Ioannina | 1,305.63 mi (2,101.21 km) |
| Northolt to Irakleio | 1,684.48 mi (2,710.92 km) |
| Northolt to Irakleio | 1,494.64 mi (2,405.40 km) |
| Northolt to Kaisariani | 1,498.42 mi (2,411.48 km) |
| Northolt to Kalamaria | 1,341.08 mi (2,158.26 km) |
| Northolt to Kalamata | 1,485.86 mi (2,391.26 km) |
| Northolt to Kallithea | 1,497.16 mi (2,409.44 km) |
| Northolt to Kalymnos | 1,669.79 mi (2,687.27 km) |
| Northolt to Kalyvia Thorikou | 1,511.13 mi (2,431.93 km) |
| Northolt to Kamatero | 1,492.11 mi (2,401.31 km) |
