| McDonough to Ickenham | 4,197.87 mi (6,755.81 km) |
| McDonough to Ifield | 4,217.17 mi (6,786.88 km) |
| McDonough to Ilford | 4,219.67 mi (6,790.90 km) |
| McDonough to Ilfracombe | 4,053.47 mi (6,523.43 km) |
| McDonough to Ilkeston | 4,133.93 mi (6,652.92 km) |
| McDonough to Ilkley | 4,095.19 mi (6,590.57 km) |
| McDonough to Immingham | 4,164.09 mi (6,701.45 km) |
| McDonough to Ince-in-Makerfield | 4,071.79 mi (6,552.91 km) |
| McDonough to Inverness | 3,945.49 mi (6,349.64 km) |
| McDonough to Inverurie | 4,015.52 mi (6,462.35 km) |
| McDonough to Ipswich | 4,251.86 mi (6,842.70 km) |
| McDonough to Irlam | 4,080.57 mi (6,567.04 km) |
| McDonough to Irthlingborough | 4,174.95 mi (6,718.93 km) |
| McDonough to Irvine | 3,956.63 mi (6,367.58 km) |
| McDonough to Islington | 4,212.28 mi (6,779.01 km) |
