| Watford to Thornaby on Tees | 204.10 mi (328.47 km) |
| Watford to Thornbury | 91.37 mi (147.04 km) |
| Watford to Thorne | 137.01 mi (220.49 km) |
| Watford to Thornton | 159.56 mi (256.79 km) |
| Watford to Thornton Heath | 21.50 mi (34.60 km) |
| Watford to Thorpe Saint Andrew | 100.11 mi (161.12 km) |
| Watford to Thundersley | 42.70 mi (68.71 km) |
| Watford to Tilbury | 35.06 mi (56.42 km) |
| Watford to Tilehurst | 30.87 mi (49.68 km) |
| Watford to Timperley | 144.63 mi (232.75 km) |
| Watford to Tipton | 93.29 mi (150.13 km) |
| Watford to Tiptree | 50.18 mi (80.76 km) |
| Watford to Tiverton | 143.38 mi (230.75 km) |
| Watford to Todmorden | 159.02 mi (255.92 km) |
| Watford to Tonbridge | 42.81 mi (68.89 km) |
