| Harpenden to Travagliato | 643.58 mi (1,035.74 km) |
| Harpenden to Traversetolo | 698.66 mi (1,124.38 km) |
| Harpenden to Trebaseleghe | 709.33 mi (1,141.56 km) |
| Harpenden to Trebisacce | 1,153.21 mi (1,855.91 km) |
| Harpenden to Trecastagni | 1,234.38 mi (1,986.54 km) |
| Harpenden to Trecate | 604.71 mi (973.19 km) |
| Harpenden to Treia | 864.20 mi (1,390.79 km) |
| Harpenden to Trento | 653.57 mi (1,051.81 km) |
| Harpenden to Trentola | 1,016.33 mi (1,635.62 km) |
| Harpenden to Trepuzzi | 1,177.43 mi (1,894.90 km) |
| Harpenden to Trescore Balneario | 627.12 mi (1,009.25 km) |
| Harpenden to Treviglio | 627.59 mi (1,010.00 km) |
| Harpenden to Trevignano | 704.05 mi (1,133.06 km) |
| Harpenden to Treviso | 712.22 mi (1,146.21 km) |
| Harpenden to Trezzano sul Naviglio | 615.18 mi (990.04 km) |
