| South Houston to Ickenham | 4,834.17 mi (7,779.85 km) |
| South Houston to Ifield | 4,855.48 mi (7,814.14 km) |
| South Houston to Ilford | 4,855.31 mi (7,813.87 km) |
| South Houston to Ilfracombe | 4,695.89 mi (7,557.30 km) |
| South Houston to Ilkeston | 4,763.49 mi (7,666.10 km) |
| South Houston to Ilkley | 4,719.82 mi (7,595.81 km) |
| South Houston to Immingham | 4,788.62 mi (7,706.53 km) |
| South Houston to Ince-in-Makerfield | 4,699.57 mi (7,563.23 km) |
| South Houston to Inverness | 4,549.99 mi (7,322.51 km) |
| South Houston to Inverurie | 4,619.48 mi (7,434.34 km) |
| South Houston to Ipswich | 4,883.41 mi (7,859.09 km) |
| South Houston to Irlam | 4,708.70 mi (7,577.92 km) |
| South Houston to Irthlingborough | 4,807.30 mi (7,736.60 km) |
| South Houston to Irvine | 4,573.89 mi (7,360.97 km) |
| South Houston to Islington | 4,848.23 mi (7,802.47 km) |
