| Alton to Indianola (Iowa) | 4,175.78 mi (6,720.27 km) |
| Alton to Indio (California) | 5,381.19 mi (8,660.19 km) |
| Alton to Inglewood (California) | 5,438.15 mi (8,751.86 km) |
| Alton to Inkster (Michigan) | 3,740.08 mi (6,019.08 km) |
| Alton to Inver Grove Heights (Minnesota) | 3,993.81 mi (6,427.41 km) |
| Alton to Inwood (New York) | 3,427.42 mi (5,515.90 km) |
| Alton to Iona (Florida) | 4,433.91 mi (7,135.69 km) |
| Alton to Ionia (Michigan) | 3,778.15 mi (6,080.35 km) |
| Alton to Iowa City (Iowa) | 4,085.45 mi (6,574.90 km) |
| Alton to Irmo (South Carolina) | 4,030.88 mi (6,487.07 km) |
| Alton to Irondale (Alabama) | 4,282.81 mi (6,892.52 km) |
| Alton to Ironton (Ohio) | 3,884.56 mi (6,251.59 km) |
| Alton to Irvine (California) | 5,435.36 mi (8,747.37 km) |
| Alton to Irving (Texas) | 4,728.54 mi (7,609.85 km) |
| Alton to Isabela (Puerto Rico) | 4,197.38 mi (6,755.02 km) |
