| Herndon to Duluth (Minnesota) | 918.90 mi (1,478.82 km) |
| Herndon to Dumas (Texas) | 1,361.48 mi (2,191.09 km) |
| Herndon to Dumont (New Jersey) | 225.68 mi (363.20 km) |
| Herndon to Duncan (Oklahoma) | 1,174.37 mi (1,889.97 km) |
| Herndon to Duncanville (Texas) | 1,175.11 mi (1,891.16 km) |
| Herndon to Dundalk (Maryland) | 52.15 mi (83.93 km) |
| Herndon to Dunedin (Florida) | 816.77 mi (1,314.47 km) |
| Herndon to Dunkirk (New York) | 263.04 mi (423.32 km) |
| Herndon to Dunmore (Pennsylvania) | 193.29 mi (311.07 km) |
| Herndon to Dunwoody (Georgia) | 518.17 mi (833.92 km) |
| Herndon to Durango (Colorado) | 1,653.92 mi (2,661.72 km) |
| Herndon to Durant (Oklahoma) | 1,107.90 mi (1,783.00 km) |
| Herndon to Durham (North Carolina) | 222.71 mi (358.42 km) |
| Herndon to Dyer (Indiana) | 561.35 mi (903.41 km) |
| Herndon to Dyersburg (Tennessee) | 686.94 mi (1,105.53 km) |
