| Willoughby to Ickenham | 3,703.10 mi (5,959.57 km) |
| Willoughby to Ifield | 3,724.72 mi (5,994.35 km) |
| Willoughby to Ilford | 3,724.13 mi (5,993.41 km) |
| Willoughby to Ilfracombe | 3,566.15 mi (5,739.16 km) |
| Willoughby to Ilkeston | 3,631.76 mi (5,844.76 km) |
| Willoughby to Ilkley | 3,587.96 mi (5,774.26 km) |
| Willoughby to Immingham | 3,656.76 mi (5,884.98 km) |
| Willoughby to Ince-in-Makerfield | 3,567.77 mi (5,741.77 km) |
| Willoughby to Inverness | 3,420.19 mi (5,504.26 km) |
| Willoughby to Inverurie | 3,489.84 mi (5,616.36 km) |
| Willoughby to Ipswich | 3,751.78 mi (6,037.91 km) |
| Willoughby to Irlam | 3,576.91 mi (5,756.48 km) |
| Willoughby to Irthlingborough | 3,675.76 mi (5,915.57 km) |
| Willoughby to Irvine | 3,442.31 mi (5,539.86 km) |
| Willoughby to Islington | 3,717.10 mi (5,982.09 km) |
