| Hard to Dallas (Texas) | 5,265.74 mi (8,474.39 km) |
| Hard to Dalton (Georgia) | 4,695.56 mi (7,556.78 km) |
| Hard to Daly City (California) | 5,854.75 mi (9,422.31 km) |
| Hard to Damascus (Maryland) | 4,168.33 mi (6,708.27 km) |
| Hard to Damascus (Oregon) | 5,393.33 mi (8,679.72 km) |
| Hard to Dana Point (California) | 5,963.56 mi (9,597.43 km) |
| Hard to Danbury (Connecticut) | 3,923.10 mi (6,313.63 km) |
| Hard to Dania Beach (Florida) | 4,906.41 mi (7,896.10 km) |
| Hard to Danville (California) | 5,833.48 mi (9,388.08 km) |
| Hard to Danville (Illinois) | 4,547.79 mi (7,318.96 km) |
| Hard to Danville (Indiana) | 4,522.46 mi (7,278.20 km) |
| Hard to Danville (Kentucky) | 4,552.45 mi (7,326.47 km) |
| Hard to Danville (Virginia) | 4,380.04 mi (7,048.99 km) |
| Hard to Daphne (Alabama) | 5,016.70 mi (8,073.60 km) |
| Hard to Darby (Pennsylvania) | 4,059.75 mi (6,533.54 km) |
