| Harpenden to Columbia (Illinois) | 4,191.02 mi (6,744.79 km) |
| Harpenden to Columbia (Maryland) | 3,628.28 mi (5,839.15 km) |
| Harpenden to Columbia (Missouri) | 4,247.49 mi (6,835.67 km) |
| Harpenden to Columbia (Pennsylvania) | 3,576.11 mi (5,755.19 km) |
| Harpenden to Columbia (South Carolina) | 4,034.63 mi (6,493.11 km) |
| Harpenden to Columbia (Tennessee) | 4,205.67 mi (6,768.38 km) |
| Harpenden to Columbia Heights (Minnesota) | 3,987.25 mi (6,416.86 km) |
| Harpenden to Columbine (Colorado) | 4,675.75 mi (7,524.90 km) |
| Harpenden to Columbus (Georgia) | 4,271.55 mi (6,874.39 km) |
| Harpenden to Columbus (Indiana) | 3,988.64 mi (6,419.10 km) |
| Harpenden to Columbus (Mississippi) | 4,364.28 mi (7,023.63 km) |
| Harpenden to Columbus (Nebraska) | 4,309.68 mi (6,935.76 km) |
| Harpenden to Columbus (Ohio) | 3,837.36 mi (6,175.64 km) |
| Harpenden to Commack (New York) | 3,410.28 mi (5,488.32 km) |
| Harpenden to Commerce (California) | 5,419.30 mi (8,721.53 km) |
