| Southwick to Ickenham | 50.70 mi (81.60 km) |
| Southwick to Ifield | 19.91 mi (32.03 km) |
| Southwick to Ilford | 51.80 mi (83.36 km) |
| Southwick to Ilfracombe | 170.60 mi (274.55 km) |
| Southwick to Ilkeston | 154.40 mi (248.48 km) |
| Southwick to Ilkley | 223.61 mi (359.87 km) |
| Southwick to Immingham | 191.94 mi (308.89 km) |
| Southwick to Ince-in-Makerfield | 211.88 mi (340.98 km) |
| Southwick to Inverness | 486.20 mi (782.47 km) |
| Southwick to Inverurie | 453.57 mi (729.94 km) |
| Southwick to Ipswich | 103.68 mi (166.86 km) |
| Southwick to Irlam | 202.62 mi (326.09 km) |
| Southwick to Irthlingborough | 104.06 mi (167.47 km) |
| Southwick to Irvine | 377.61 mi (607.70 km) |
| Southwick to Islington | 49.27 mi (79.30 km) |
