| Healdsburg to Duluth (Minnesota) | 1,646.17 mi (2,649.25 km) |
| Healdsburg to Dumas (Texas) | 1,162.74 mi (1,871.25 km) |
| Healdsburg to Dumont (New Jersey) | 2,565.90 mi (4,129.41 km) |
| Healdsburg to Duncan (Oklahoma) | 1,407.76 mi (2,265.58 km) |
| Healdsburg to Duncanville (Texas) | 1,509.00 mi (2,428.50 km) |
| Healdsburg to Dundalk (Maryland) | 2,464.29 mi (3,965.89 km) |
| Healdsburg to Dunedin (Florida) | 2,405.35 mi (3,871.04 km) |
| Healdsburg to Dunkirk (New York) | 2,275.73 mi (3,662.43 km) |
| Healdsburg to Dunmore (Pennsylvania) | 2,476.95 mi (3,986.26 km) |
| Healdsburg to Dunwoody (Georgia) | 2,155.52 mi (3,468.97 km) |
| Healdsburg to Durango (Colorado) | 821.04 mi (1,321.33 km) |
| Healdsburg to Durant (Oklahoma) | 1,502.65 mi (2,418.28 km) |
| Healdsburg to Durham (North Carolina) | 2,400.08 mi (3,862.56 km) |
| Healdsburg to Dyer (Indiana) | 1,867.14 mi (3,004.87 km) |
| Healdsburg to Dyersburg (Tennessee) | 1,838.07 mi (2,958.09 km) |
