| Frederick to Ickenham | 3,642.15 mi (5,861.47 km) |
| Frederick to Ifield | 3,661.85 mi (5,893.17 km) |
| Frederick to Ilford | 3,663.84 mi (5,896.38 km) |
| Frederick to Ilfracombe | 3,498.97 mi (5,631.04 km) |
| Frederick to Ilkeston | 3,577.14 mi (5,756.85 km) |
| Frederick to Ilkley | 3,537.85 mi (5,693.61 km) |
| Frederick to Immingham | 3,606.76 mi (5,804.51 km) |
| Frederick to Ince-in-Makerfield | 3,514.76 mi (5,656.45 km) |
| Frederick to Inverness | 3,387.62 mi (5,451.85 km) |
| Frederick to Inverurie | 3,457.66 mi (5,564.56 km) |
| Frederick to Ipswich | 3,695.38 mi (5,947.15 km) |
| Frederick to Irlam | 3,523.58 mi (5,670.65 km) |
| Frederick to Irthlingborough | 3,618.56 mi (5,823.51 km) |
| Frederick to Irvine | 3,398.78 mi (5,469.80 km) |
| Frederick to Islington | 3,656.50 mi (5,884.57 km) |
