| Duluth to Ickenham | 3,874.14 mi (6,234.82 km) |
| Duluth to Ifield | 3,899.75 mi (6,276.05 km) |
| Duluth to Ilford | 3,893.06 mi (6,265.27 km) |
| Duluth to Ilfracombe | 3,755.48 mi (6,043.86 km) |
| Duluth to Ilkeston | 3,789.62 mi (6,098.81 km) |
| Duluth to Ilkley | 3,736.26 mi (6,012.93 km) |
| Duluth to Immingham | 3,802.95 mi (6,120.25 km) |
| Duluth to Ince-in-Makerfield | 3,723.52 mi (5,992.42 km) |
| Duluth to Inverness | 3,531.46 mi (5,683.34 km) |
| Duluth to Inverurie | 3,598.14 mi (5,790.65 km) |
| Duluth to Ipswich | 3,910.74 mi (6,293.73 km) |
| Duluth to Irlam | 3,733.18 mi (6,007.97 km) |
| Duluth to Irthlingborough | 3,838.59 mi (6,177.62 km) |
| Duluth to Irvine | 3,579.06 mi (5,759.94 km) |
| Duluth to Islington | 3,886.93 mi (6,255.40 km) |
