| Apex to Ickenham | 3,872.14 mi (6,231.60 km) |
| Apex to Ifield | 3,890.74 mi (6,261.53 km) |
| Apex to Ilford | 3,894.13 mi (6,266.99 km) |
| Apex to Ilfracombe | 3,725.91 mi (5,996.27 km) |
| Apex to Ilkeston | 3,810.63 mi (6,132.62 km) |
| Apex to Ilkley | 3,773.72 mi (6,073.21 km) |
| Apex to Immingham | 3,842.51 mi (6,183.93 km) |
| Apex to Ince-in-Makerfield | 3,749.23 mi (6,033.81 km) |
| Apex to Inverness | 3,631.91 mi (5,844.99 km) |
| Apex to Inverurie | 3,701.95 mi (5,957.72 km) |
| Apex to Ipswich | 3,927.66 mi (6,320.96 km) |
| Apex to Irlam | 3,757.87 mi (6,047.70 km) |
| Apex to Irthlingborough | 3,850.61 mi (6,196.96 km) |
| Apex to Irvine | 3,638.16 mi (5,855.05 km) |
| Apex to Islington | 3,886.64 mi (6,254.95 km) |
