| Johnston to Indianapolis (Indiana) | 418.01 mi (672.73 km) |
| Johnston to Indianola (Iowa) | 24.10 mi (38.79 km) |
| Johnston to Indio (California) | 1,342.39 mi (2,160.38 km) |
| Johnston to Inglewood (California) | 1,439.77 mi (2,317.09 km) |
| Johnston to Inkster (Michigan) | 535.79 mi (862.27 km) |
| Johnston to Inver Grove Heights (Minnesota) | 219.08 mi (352.57 km) |
| Johnston to Inwood (New York) | 1,039.30 mi (1,672.59 km) |
| Johnston to Iona (Florida) | 1,243.15 mi (2,000.66 km) |
| Johnston to Ionia (Michigan) | 450.47 mi (724.97 km) |
| Johnston to Iowa City (Iowa) | 113.21 mi (182.19 km) |
| Johnston to Irmo (South Carolina) | 859.59 mi (1,383.37 km) |
| Johnston to Irondale (Alabama) | 682.28 mi (1,098.03 km) |
| Johnston to Ironton (Ohio) | 622.57 mi (1,001.92 km) |
| Johnston to Irvine (California) | 1,420.76 mi (2,286.49 km) |
| Johnston to Irving (Texas) | 635.71 mi (1,023.08 km) |
