| Houston to Ickenham | 4,834.02 mi (7,779.60 km) |
| Houston to Ifield | 4,855.40 mi (7,814.01 km) |
| Houston to Ilford | 4,855.12 mi (7,813.56 km) |
| Houston to Ilfracombe | 4,696.02 mi (7,557.51 km) |
| Houston to Ilkeston | 4,763.07 mi (7,665.42 km) |
| Houston to Ilkley | 4,719.21 mi (7,594.83 km) |
| Houston to Immingham | 4,787.99 mi (7,705.52 km) |
| Houston to Ince-in-Makerfield | 4,699.09 mi (7,562.45 km) |
| Houston to Inverness | 4,548.68 mi (7,320.39 km) |
| Houston to Inverurie | 4,618.13 mi (7,432.16 km) |
| Houston to Ipswich | 4,883.05 mi (7,858.50 km) |
| Houston to Irlam | 4,708.23 mi (7,577.16 km) |
| Houston to Irthlingborough | 4,806.98 mi (7,736.09 km) |
| Houston to Irvine | 4,573.03 mi (7,359.58 km) |
| Houston to Islington | 4,848.05 mi (7,802.19 km) |
