| Willoughby to Dallas (Oregon) | 2,096.25 mi (3,373.58 km) |
| Willoughby to Dallas (Texas) | 1,040.53 mi (1,674.58 km) |
| Willoughby to Dalton (Georgia) | 512.90 mi (825.43 km) |
| Willoughby to Daly City (California) | 2,180.15 mi (3,508.62 km) |
| Willoughby to Damascus (Maryland) | 275.61 mi (443.56 km) |
| Willoughby to Damascus (Oregon) | 2,049.39 mi (3,298.18 km) |
| Willoughby to Dana Point (California) | 2,049.53 mi (3,298.40 km) |
| Willoughby to Danbury (Connecticut) | 410.80 mi (661.12 km) |
| Willoughby to Dania Beach (Florida) | 1,079.26 mi (1,736.90 km) |
| Willoughby to Danville (California) | 2,151.58 mi (3,462.63 km) |
| Willoughby to Danville (Illinois) | 340.11 mi (547.36 km) |
| Willoughby to Danville (Indiana) | 296.90 mi (477.81 km) |
| Willoughby to Danville (Kentucky) | 329.59 mi (530.42 km) |
| Willoughby to Danville (Virginia) | 365.83 mi (588.75 km) |
| Willoughby to Daphne (Alabama) | 842.07 mi (1,355.18 km) |
