| Herndon to Indianola (Iowa) | 868.71 mi (1,398.06 km) |
| Herndon to Indio (California) | 2,175.10 mi (3,500.48 km) |
| Herndon to Inglewood (California) | 2,282.75 mi (3,673.74 km) |
| Herndon to Inkster (Michigan) | 386.31 mi (621.70 km) |
| Herndon to Inver Grove Heights (Minnesota) | 899.78 mi (1,448.06 km) |
| Herndon to Inwood (New York) | 224.22 mi (360.85 km) |
| Herndon to Iona (Florida) | 900.24 mi (1,448.80 km) |
| Herndon to Ionia (Michigan) | 486.94 mi (783.65 km) |
| Herndon to Iowa City (Iowa) | 766.94 mi (1,234.27 km) |
| Herndon to Irmo (South Carolina) | 397.20 mi (639.23 km) |
| Herndon to Irondale (Alabama) | 637.81 mi (1,026.45 km) |
| Herndon to Ironton (Ohio) | 286.67 mi (461.35 km) |
| Herndon to Irvine (California) | 2,259.09 mi (3,635.65 km) |
| Herndon to Irving (Texas) | 1,171.43 mi (1,885.23 km) |
| Herndon to Isabela (Puerto Rico) | 1,544.85 mi (2,486.19 km) |
