| Highlands Ranch to Ickenham | 4,682.06 mi (7,535.05 km) |
| Highlands Ranch to Ifield | 4,708.25 mi (7,577.20 km) |
| Highlands Ranch to Ilford | 4,700.55 mi (7,564.80 km) |
| Highlands Ranch to Ilfracombe | 4,566.53 mi (7,349.12 km) |
| Highlands Ranch to Ilkeston | 4,595.51 mi (7,395.76 km) |
| Highlands Ranch to Ilkley | 4,540.50 mi (7,307.24 km) |
| Highlands Ranch to Immingham | 4,606.44 mi (7,413.35 km) |
| Highlands Ranch to Ince-in-Makerfield | 4,529.28 mi (7,289.18 km) |
| Highlands Ranch to Inverness | 4,328.35 mi (6,965.81 km) |
| Highlands Ranch to Inverurie | 4,393.80 mi (7,071.14 km) |
| Highlands Ranch to Ipswich | 4,716.33 mi (7,590.20 km) |
| Highlands Ranch to Irlam | 4,539.00 mi (7,304.81 km) |
| Highlands Ranch to Irthlingborough | 4,645.20 mi (7,475.73 km) |
| Highlands Ranch to Irvine | 4,381.67 mi (7,051.62 km) |
| Highlands Ranch to Islington | 4,694.60 mi (7,555.22 km) |
