| Herndon to Ashtabula (Ohio) | 269.48 mi (433.68 km) |
| Herndon to Ashwaubenon (Wisconsin) | 669.56 mi (1,077.56 km) |
| Herndon to Aspen Hill (Maryland) | 18.40 mi (29.60 km) |
| Herndon to Astoria (Oregon) | 2,378.40 mi (3,827.66 km) |
| Herndon to Atascadero (California) | 2,371.92 mi (3,817.24 km) |
| Herndon to Atascocita (Texas) | 1,186.25 mi (1,909.08 km) |
| Herndon to Atchison (Kansas) | 948.84 mi (1,527.01 km) |
| Herndon to Athens (Alabama) | 602.04 mi (968.90 km) |
| Herndon to Athens (Georgia) | 480.15 mi (772.73 km) |
| Herndon to Athens (Ohio) | 253.66 mi (408.22 km) |
| Herndon to Athens (Tennessee) | 465.22 mi (748.69 km) |
| Herndon to Athens (Texas) | 1,134.19 mi (1,825.30 km) |
| Herndon to Atlanta (Georgia) | 531.32 mi (855.08 km) |
| Herndon to Atlantic Beach (Florida) | 638.63 mi (1,027.78 km) |
| Herndon to Atlantic City (New Jersey) | 159.68 mi (256.97 km) |
