| Harpenden to Friern Barnet | 16.41 mi (26.41 km) |
| Harpenden to Frimley | 38.52 mi (62.00 km) |
| Harpenden to Frodsham | 142.66 mi (229.58 km) |
| Harpenden to Frome | 93.94 mi (151.18 km) |
| Harpenden to Fulham | 24.09 mi (38.77 km) |
| Harpenden to Fulwood | 118.04 mi (189.96 km) |
| Harpenden to Gainsborough | 110.86 mi (178.42 km) |
| Harpenden to Galashiels | 281.11 mi (452.40 km) |
| Harpenden to Garforth | 143.11 mi (230.32 km) |
| Harpenden to Gateshead | 222.45 mi (358.00 km) |
| Harpenden to Giffnock | 318.90 mi (513.22 km) |
| Harpenden to Gillingham | 98.80 mi (159.01 km) |
| Harpenden to Gillingham | 48.92 mi (78.72 km) |
| Harpenden to Glasgow | 321.29 mi (517.07 km) |
| Harpenden to Glastonbury | 111.63 mi (179.65 km) |
