| Herndon to Town and Country (Missouri) | 704.75 mi (1,134.19 km) |
| Herndon to Towson (Maryland) | 50.50 mi (81.28 km) |
| Herndon to Tracy (California) | 2,365.76 mi (3,807.32 km) |
| Herndon to Traverse City (Michigan) | 581.27 mi (935.47 km) |
| Herndon to Travilah (Maryland) | 9.62 mi (15.48 km) |
| Herndon to Trenton (Michigan) | 375.17 mi (603.78 km) |
| Herndon to Trenton (New Jersey) | 164.31 mi (264.42 km) |
| Herndon to Trenton (Ohio) | 380.24 mi (611.93 km) |
| Herndon to Triangle (Virginia) | 29.35 mi (47.24 km) |
| Herndon to Trinity (Florida) | 804.44 mi (1,294.62 km) |
| Herndon to Trophy Club (Texas) | 1,178.37 mi (1,896.40 km) |
| Herndon to Trotwood (Ohio) | 374.33 mi (602.42 km) |
| Herndon to Troutdale (Oregon) | 2,314.70 mi (3,725.15 km) |
| Herndon to Troy (Alabama) | 691.32 mi (1,112.58 km) |
| Herndon to Troy (Illinois) | 672.90 mi (1,082.93 km) |
