| Chicago Heights to Ickenham | 3,951.01 mi (6,358.54 km) |
| Chicago Heights to Ifield | 3,974.04 mi (6,395.60 km) |
| Chicago Heights to Ilford | 3,971.42 mi (6,391.38 km) |
| Chicago Heights to Ilfracombe | 3,819.53 mi (6,146.94 km) |
| Chicago Heights to Ilkeston | 3,874.94 mi (6,236.11 km) |
| Chicago Heights to Ilkley | 3,827.67 mi (6,160.04 km) |
| Chicago Heights to Immingham | 3,896.04 mi (6,270.06 km) |
| Chicago Heights to Ince-in-Makerfield | 3,809.95 mi (6,131.52 km) |
| Chicago Heights to Inverness | 3,646.01 mi (5,867.68 km) |
| Chicago Heights to Inverurie | 3,714.92 mi (5,978.59 km) |
| Chicago Heights to Ipswich | 3,995.82 mi (6,430.66 km) |
| Chicago Heights to Irlam | 3,819.31 mi (6,146.58 km) |
| Chicago Heights to Irthlingborough | 3,920.81 mi (6,309.93 km) |
| Chicago Heights to Irvine | 3,677.33 mi (5,918.10 km) |
| Chicago Heights to Islington | 3,964.66 mi (6,380.50 km) |
