| Southgate to Ickenham | 14.72 mi (23.69 km) |
| Southgate to Ifield | 35.29 mi (56.79 km) |
| Southgate to Ilford | 10.45 mi (16.82 km) |
| Southgate to Ilfracombe | 174.52 mi (280.86 km) |
| Southgate to Ilkeston | 105.17 mi (169.25 km) |
| Southgate to Ilkley | 173.57 mi (279.33 km) |
| Southgate to Immingham | 137.02 mi (220.51 km) |
| Southgate to Ince-in-Makerfield | 167.80 mi (270.04 km) |
| Southgate to Inverness | 435.84 mi (701.42 km) |
| Southgate to Inverurie | 400.57 mi (644.65 km) |
| Southgate to Ipswich | 62.20 mi (100.10 km) |
| Southgate to Irlam | 158.11 mi (254.45 km) |
| Southgate to Irthlingborough | 52.15 mi (83.92 km) |
| Southgate to Irvine | 332.22 mi (534.66 km) |
| Southgate to Islington | 6.14 mi (9.88 km) |
