| Herndon to Troy (Michigan) | 391.08 mi (629.38 km) |
| Herndon to Troy (Missouri) | 729.07 mi (1,173.32 km) |
| Herndon to Troy (New York) | 324.45 mi (522.15 km) |
| Herndon to Troy (Ohio) | 371.58 mi (598.00 km) |
| Herndon to Truckee (California) | 2,271.15 mi (3,655.06 km) |
| Herndon to Trujillo Alto (Puerto Rico) | 1,579.05 mi (2,541.23 km) |
| Herndon to Trumbull Center (Connecticut) | 271.92 mi (437.62 km) |
| Herndon to Trussville (Alabama) | 630.09 mi (1,014.03 km) |
| Herndon to Tualatin (Oregon) | 2,334.02 mi (3,756.24 km) |
| Herndon to Tuckahoe (Virginia) | 96.10 mi (154.66 km) |
| Herndon to Tucker (Georgia) | 518.45 mi (834.36 km) |
| Herndon to Tucson (Arizona) | 1,928.74 mi (3,104.01 km) |
| Herndon to Tucson Estates (Arizona) | 1,941.34 mi (3,124.29 km) |
| Herndon to Tucson Mountains (Arizona) | 1,935.87 mi (3,115.48 km) |
| Herndon to Tukwila (Washington) | 2,300.69 mi (3,702.60 km) |
