| Hartlepool to Dixon (Illinois) | 3,877.85 mi (6,240.80 km) |
| Hartlepool to Dobbs Ferry (New York) | 3,335.81 mi (5,368.46 km) |
| Hartlepool to Doctor Phillips (Florida) | 4,261.16 mi (6,857.67 km) |
| Hartlepool to Dodge City (Kansas) | 4,459.88 mi (7,177.48 km) |
| Hartlepool to Dolton (Illinois) | 3,820.72 mi (6,148.85 km) |
| Hartlepool to Donna (Texas) | 5,021.49 mi (8,081.31 km) |
| Hartlepool to Dorado (Puerto Rico) | 4,192.87 mi (6,747.78 km) |
| Hartlepool to Doral (Florida) | 4,355.79 mi (7,009.97 km) |
| Hartlepool to Doraville (Georgia) | 4,085.08 mi (6,574.30 km) |
| Hartlepool to Dothan (Alabama) | 4,267.46 mi (6,867.81 km) |
| Hartlepool to Douglas (Arizona) | 5,138.30 mi (8,269.30 km) |
| Hartlepool to Douglas (Georgia) | 4,154.43 mi (6,685.90 km) |
| Hartlepool to Douglasville (Georgia) | 4,110.41 mi (6,615.06 km) |
| Hartlepool to Dover (Delaware) | 3,486.91 mi (5,611.65 km) |
| Hartlepool to Dover (New Hampshire) | 3,121.64 mi (5,023.80 km) |
