| Security-Widefield to Ickenham | 4,714.79 mi (7,587.72 km) |
| Security-Widefield to Ifield | 4,740.76 mi (7,629.51 km) |
| Security-Widefield to Ilford | 4,733.45 mi (7,617.75 km) |
| Security-Widefield to Ilfracombe | 4,597.86 mi (7,399.54 km) |
| Security-Widefield to Ilkeston | 4,628.97 mi (7,449.61 km) |
| Security-Widefield to Ilkley | 4,574.50 mi (7,361.94 km) |
| Security-Widefield to Immingham | 4,640.68 mi (7,468.45 km) |
| Security-Widefield to Ince-in-Makerfield | 4,562.78 mi (7,343.08 km) |
| Security-Widefield to Inverness | 4,364.29 mi (7,023.64 km) |
| Security-Widefield to Inverurie | 4,430.03 mi (7,129.45 km) |
| Security-Widefield to Ipswich | 4,749.91 mi (7,644.25 km) |
| Security-Widefield to Irlam | 4,572.48 mi (7,358.69 km) |
| Security-Widefield to Irthlingborough | 4,678.42 mi (7,529.19 km) |
| Security-Widefield to Irvine | 4,416.13 mi (7,107.07 km) |
| Security-Widefield to Islington | 4,727.43 mi (7,608.06 km) |
