| Holyhead to Dallas (Texas) | 4,521.66 mi (7,276.90 km) |
| Holyhead to Dalton (Georgia) | 3,961.82 mi (6,375.94 km) |
| Holyhead to Daly City (California) | 5,138.46 mi (8,269.56 km) |
| Holyhead to Damascus (Maryland) | 3,437.11 mi (5,531.49 km) |
| Holyhead to Damascus (Oregon) | 4,694.41 mi (7,554.93 km) |
| Holyhead to Dana Point (California) | 5,230.28 mi (8,417.32 km) |
| Holyhead to Danbury (Connecticut) | 3,192.36 mi (5,137.60 km) |
| Holyhead to Dania Beach (Florida) | 4,207.59 mi (6,771.47 km) |
| Holyhead to Danville (California) | 5,116.21 mi (8,233.74 km) |
| Holyhead to Danville (Illinois) | 3,803.90 mi (6,121.78 km) |
| Holyhead to Danville (Indiana) | 3,779.67 mi (6,082.79 km) |
| Holyhead to Danville (Kentucky) | 3,814.01 mi (6,138.06 km) |
| Holyhead to Danville (Virginia) | 3,651.62 mi (5,876.72 km) |
| Holyhead to Daphne (Alabama) | 4,286.14 mi (6,897.88 km) |
| Holyhead to Darby (Pennsylvania) | 3,330.03 mi (5,359.17 km) |
