| Round Rock to Ickenham | 4,884.65 mi (7,861.08 km) |
| Round Rock to Ifield | 4,906.88 mi (7,896.86 km) |
| Round Rock to Ilford | 4,905.41 mi (7,894.50 km) |
| Round Rock to Ilfracombe | 4,749.71 mi (7,643.93 km) |
| Round Rock to Ilkeston | 4,810.94 mi (7,742.47 km) |
| Round Rock to Ilkley | 4,765.12 mi (7,668.72 km) |
| Round Rock to Immingham | 4,833.69 mi (7,779.07 km) |
| Round Rock to Ince-in-Makerfield | 4,746.37 mi (7,638.54 km) |
| Round Rock to Inverness | 4,587.12 mi (7,382.25 km) |
| Round Rock to Inverurie | 4,656.17 mi (7,493.37 km) |
| Round Rock to Ipswich | 4,931.49 mi (7,936.46 km) |
| Round Rock to Irlam | 4,755.63 mi (7,653.45 km) |
| Round Rock to Irthlingborough | 4,855.94 mi (7,814.88 km) |
| Round Rock to Irvine | 4,616.34 mi (7,429.28 km) |
| Round Rock to Islington | 4,898.50 mi (7,883.37 km) |
