| Harpenden to Archdale (North Carolina) | 3,906.87 mi (6,287.51 km) |
| Harpenden to Arden-Arcade (California) | 5,253.35 mi (8,454.44 km) |
| Harpenden to Ardmore (Oklahoma) | 4,669.03 mi (7,514.08 km) |
| Harpenden to Ardmore (Pennsylvania) | 3,528.89 mi (5,679.20 km) |
| Harpenden to Arecibo (Puerto Rico) | 4,219.96 mi (6,791.36 km) |
| Harpenden to Arkadelphia (Arkansas) | 4,516.93 mi (7,269.30 km) |
| Harpenden to Arkansas City (Kansas) | 4,518.08 mi (7,271.15 km) |
| Harpenden to Arlington (Tennessee) | 4,327.04 mi (6,963.69 km) |
| Harpenden to Arlington (Texas) | 4,746.48 mi (7,638.72 km) |
| Harpenden to Arlington (Virginia) | 3,652.65 mi (5,878.38 km) |
| Harpenden to Arlington (Washington) | 4,724.35 mi (7,603.11 km) |
| Harpenden to Arlington Heights (Illinois) | 3,932.33 mi (6,328.47 km) |
| Harpenden to Arnold (Maryland) | 3,620.66 mi (5,826.89 km) |
| Harpenden to Arnold (Missouri) | 4,198.45 mi (6,756.76 km) |
| Harpenden to Arroyo Grande (California) | 5,430.65 mi (8,739.79 km) |
