| Duluth to Indianola (Iowa) | 380.60 mi (612.52 km) |
| Duluth to Indio (California) | 1,547.30 mi (2,490.14 km) |
| Duluth to Inglewood (California) | 1,627.36 mi (2,618.99 km) |
| Duluth to Inkster (Michigan) | 533.14 mi (858.01 km) |
| Duluth to Inver Grove Heights (Minnesota) | 141.89 mi (228.36 km) |
| Duluth to Inwood (New York) | 1,008.99 mi (1,623.81 km) |
| Duluth to Iona (Florida) | 1,506.22 mi (2,424.02 km) |
| Duluth to Ionia (Michigan) | 433.97 mi (698.41 km) |
| Duluth to Iowa City (Iowa) | 355.02 mi (571.34 km) |
| Duluth to Irmo (South Carolina) | 1,045.60 mi (1,682.72 km) |
| Duluth to Irondale (Alabama) | 958.28 mi (1,542.20 km) |
| Duluth to Ironton (Ohio) | 744.24 mi (1,197.74 km) |
| Duluth to Irvine (California) | 1,615.47 mi (2,599.85 km) |
| Duluth to Irving (Texas) | 994.67 mi (1,600.77 km) |
| Duluth to Isabela (Puerto Rico) | 2,417.53 mi (3,890.64 km) |
