| Greentree to Ickenham | 3,521.53 mi (5,667.36 km) |
| Greentree to Ifield | 3,540.76 mi (5,698.30 km) |
| Greentree to Ilford | 3,543.36 mi (5,702.49 km) |
| Greentree to Ilfracombe | 3,377.02 mi (5,434.79 km) |
| Greentree to Ilkeston | 3,458.13 mi (5,565.32 km) |
| Greentree to Ilkley | 3,420.03 mi (5,504.00 km) |
| Greentree to Immingham | 3,488.89 mi (5,614.83 km) |
| Greentree to Ince-in-Makerfield | 3,396.22 mi (5,465.69 km) |
| Greentree to Inverness | 3,274.78 mi (5,270.25 km) |
| Greentree to Inverurie | 3,344.83 mi (5,382.99 km) |
| Greentree to Ipswich | 3,575.82 mi (5,754.73 km) |
| Greentree to Irlam | 3,404.95 mi (5,479.74 km) |
| Greentree to Irthlingborough | 3,498.87 mi (5,630.89 km) |
| Greentree to Irvine | 3,282.86 mi (5,283.26 km) |
| Greentree to Islington | 3,535.96 mi (5,690.57 km) |
