| Holyhead to Dixon (Illinois) | 3,793.67 mi (6,105.32 km) |
| Holyhead to Dobbs Ferry (New York) | 3,225.46 mi (5,190.88 km) |
| Holyhead to Doctor Phillips (Florida) | 4,139.12 mi (6,661.28 km) |
| Holyhead to Dodge City (Kansas) | 4,385.16 mi (7,057.24 km) |
| Holyhead to Dolton (Illinois) | 3,733.02 mi (6,007.72 km) |
| Holyhead to Donna (Texas) | 4,923.32 mi (7,923.32 km) |
| Holyhead to Dorado (Puerto Rico) | 4,038.75 mi (6,499.73 km) |
| Holyhead to Doral (Florida) | 4,228.17 mi (6,804.58 km) |
| Holyhead to Doraville (Georgia) | 3,976.54 mi (6,399.62 km) |
| Holyhead to Dothan (Alabama) | 4,156.09 mi (6,688.57 km) |
| Holyhead to Douglas (Arizona) | 5,069.92 mi (8,159.24 km) |
| Holyhead to Douglas (Georgia) | 4,039.44 mi (6,500.85 km) |
| Holyhead to Douglasville (Georgia) | 4,002.26 mi (6,441.02 km) |
| Holyhead to Dover (Delaware) | 3,374.98 mi (5,431.51 km) |
| Holyhead to Dover (New Hampshire) | 3,012.05 mi (4,847.43 km) |
