| Herndon to The Villages (Florida) | 743.58 mi (1,196.68 km) |
| Herndon to The Woodlands (Texas) | 1,193.71 mi (1,921.09 km) |
| Herndon to Thibodaux (Louisiana) | 992.10 mi (1,596.63 km) |
| Herndon to Thomasville (Georgia) | 674.13 mi (1,084.91 km) |
| Herndon to Thomasville (North Carolina) | 259.57 mi (417.73 km) |
| Herndon to Thonotosassa (Florida) | 805.53 mi (1,296.38 km) |
| Herndon to Thornton (Colorado) | 1,465.97 mi (2,359.26 km) |
| Herndon to Thousand Oaks (California) | 2,305.47 mi (3,710.30 km) |
| Herndon to Three Lakes (Florida) | 937.40 mi (1,508.60 km) |
| Herndon to Tiffin (Ohio) | 340.37 mi (547.77 km) |
| Herndon to Tifton (Georgia) | 623.28 mi (1,003.07 km) |
| Herndon to Tigard (Oregon) | 2,334.18 mi (3,756.50 km) |
| Herndon to Tillmans Corner (Alabama) | 843.42 mi (1,357.36 km) |
| Herndon to Timberlake (Virginia) | 152.56 mi (245.53 km) |
| Herndon to Timberlane (Louisiana) | 954.24 mi (1,535.70 km) |
