| Harpenden to Ansonia (Connecticut) | 3,379.95 mi (5,439.51 km) |
| Harpenden to Antelope (California) | 5,246.08 mi (8,442.75 km) |
| Harpenden to Anthem (Arizona) | 5,228.05 mi (8,413.73 km) |
| Harpenden to Antioch (California) | 5,301.60 mi (8,532.11 km) |
| Harpenden to Antioch (Illinois) | 3,918.05 mi (6,305.50 km) |
| Harpenden to Apache Junction (Arizona) | 5,233.62 mi (8,422.69 km) |
| Harpenden to Apex (North Carolina) | 3,871.01 mi (6,229.78 km) |
| Harpenden to Apollo Beach (Florida) | 4,406.79 mi (7,092.05 km) |
| Harpenden to Apopka (Florida) | 4,323.27 mi (6,957.63 km) |
| Harpenden to Apple Valley (California) | 5,358.32 mi (8,623.39 km) |
| Harpenden to Apple Valley (Minnesota) | 3,999.88 mi (6,437.19 km) |
| Harpenden to Appleton (Wisconsin) | 3,846.55 mi (6,190.42 km) |
| Harpenden to Arbutus (Maryland) | 3,619.60 mi (5,825.18 km) |
| Harpenden to Arcadia (California) | 5,407.74 mi (8,702.91 km) |
| Harpenden to Arcata (California) | 5,198.87 mi (8,366.78 km) |
