| Northolt to Isny im Allgau | 535.99 mi (862.59 km) |
| Northolt to Isselburg | 293.39 mi (472.17 km) |
| Northolt to Issum | 291.82 mi (469.65 km) |
| Northolt to Itzehoe | 444.58 mi (715.48 km) |
| Northolt to Jena | 518.40 mi (834.28 km) |
| Northolt to Jever | 374.31 mi (602.39 km) |
| Northolt to Jork | 443.72 mi (714.09 km) |
| Northolt to Juchen | 298.18 mi (479.88 km) |
| Northolt to Julich | 294.15 mi (473.39 km) |
| Northolt to Juterbog | 574.77 mi (925.00 km) |
| Northolt to Kaarst | 302.03 mi (486.08 km) |
| Northolt to Kaiserslautern | 385.82 mi (620.91 km) |
| Northolt to Kalkar | 285.87 mi (460.07 km) |
| Northolt to Kall | 308.23 mi (496.05 km) |
| Northolt to Kaltenkirchen | 460.18 mi (740.58 km) |
