| Helena to Indianola (Iowa) | 983.32 mi (1,582.51 km) |
| Helena to Indio (California) | 915.74 mi (1,473.75 km) |
| Helena to Inglewood (California) | 934.01 mi (1,503.14 km) |
| Helena to Inkster (Michigan) | 1,438.38 mi (2,314.85 km) |
| Helena to Inver Grove Heights (Minnesota) | 920.66 mi (1,481.66 km) |
| Helena to Inwood (New York) | 1,938.47 mi (3,119.66 km) |
| Helena to Iona (Florida) | 2,146.91 mi (3,455.12 km) |
| Helena to Ionia (Michigan) | 1,338.04 mi (2,153.37 km) |
| Helena to Iowa City (Iowa) | 1,068.37 mi (1,719.37 km) |
| Helena to Irmo (South Carolina) | 1,822.01 mi (2,932.24 km) |
| Helena to Irondale (Alabama) | 1,604.56 mi (2,582.29 km) |
| Helena to Ironton (Ohio) | 1,582.57 mi (2,546.90 km) |
| Helena to Irvine (California) | 942.29 mi (1,516.46 km) |
| Helena to Irving (Texas) | 1,236.79 mi (1,990.42 km) |
| Helena to Isabela (Puerto Rico) | 3,196.70 mi (5,144.59 km) |
