| Rockford to Ickenham | 3,970.34 mi (6,389.65 km) |
| Rockford to Ifield | 3,993.94 mi (6,427.62 km) |
| Rockford to Ilford | 3,990.47 mi (6,422.04 km) |
| Rockford to Ilfracombe | 3,841.34 mi (6,182.03 km) |
| Rockford to Ilkeston | 3,892.40 mi (6,264.22 km) |
| Rockford to Ilkley | 3,843.79 mi (6,185.98 km) |
| Rockford to Immingham | 3,911.89 mi (6,295.58 km) |
| Rockford to Ince-in-Makerfield | 3,827.09 mi (6,159.11 km) |
| Rockford to Inverness | 3,656.94 mi (5,885.28 km) |
| Rockford to Inverurie | 3,725.48 mi (5,995.57 km) |
| Rockford to Ipswich | 4,013.50 mi (6,459.10 km) |
| Rockford to Irlam | 3,836.52 mi (6,174.29 km) |
| Rockford to Irthlingborough | 3,938.98 mi (6,339.18 km) |
| Rockford to Irvine | 3,691.79 mi (5,941.36 km) |
| Rockford to Islington | 3,983.83 mi (6,411.35 km) |
