| National City to Ickenham | 5,469.78 mi (8,802.76 km) |
| National City to Ifield | 5,497.09 mi (8,846.71 km) |
| National City to Ilford | 5,487.33 mi (8,831.01 km) |
| National City to Ilfracombe | 5,361.42 mi (8,628.37 km) |
| National City to Ilkeston | 5,379.53 mi (8,657.51 km) |
| National City to Ilkley | 5,321.71 mi (8,564.46 km) |
| National City to Immingham | 5,386.02 mi (8,667.97 km) |
| National City to Ince-in-Makerfield | 5,313.32 mi (8,550.96 km) |
| National City to Inverness | 5,098.35 mi (8,205.00 km) |
| National City to Inverurie | 5,161.53 mi (8,306.68 km) |
| National City to Ipswich | 5,499.35 mi (8,850.34 km) |
| National City to Irlam | 5,323.11 mi (8,566.71 km) |
| National City to Irthlingborough | 5,430.43 mi (8,739.43 km) |
| National City to Irvine | 5,160.68 mi (8,305.32 km) |
| National City to Islington | 5,481.76 mi (8,822.04 km) |
