| Herndon to Hutchinson (Minnesota) | 961.77 mi (1,547.83 km) |
| Herndon to Hutto (Texas) | 1,280.01 mi (2,059.98 km) |
| Herndon to Hyattsville (Maryland) | 23.21 mi (37.35 km) |
| Herndon to Hybla Valley (Virginia) | 22.42 mi (36.09 km) |
| Herndon to Idaho Falls (Idaho) | 1,813.89 mi (2,919.18 km) |
| Herndon to Idylwood (Virginia) | 11.20 mi (18.03 km) |
| Herndon to Ilchester (Maryland) | 37.35 mi (60.11 km) |
| Herndon to Immokalee (Florida) | 897.71 mi (1,444.73 km) |
| Herndon to Imperial (California) | 2,162.32 mi (3,479.91 km) |
| Herndon to Imperial Beach (California) | 2,252.49 mi (3,625.03 km) |
| Herndon to Independence (Kentucky) | 384.71 mi (619.14 km) |
| Herndon to Independence (Missouri) | 909.20 mi (1,463.22 km) |
| Herndon to Indian Trail (North Carolina) | 323.86 mi (521.21 km) |
| Herndon to Indiana (Pennsylvania) | 147.79 mi (237.85 km) |
| Herndon to Indianapolis (Indiana) | 470.95 mi (757.92 km) |
