| Sintra to Dixon (Illinois) | 4,063.22 mi (6,539.13 km) |
| Sintra to Dobbs Ferry (New York) | 3,340.93 mi (5,376.70 km) |
| Sintra to Doctor Phillips (Florida) | 4,104.07 mi (6,604.86 km) |
| Sintra to Dodge City (Kansas) | 4,688.40 mi (7,545.26 km) |
| Sintra to Dolton (Illinois) | 3,982.36 mi (6,408.99 km) |
| Sintra to Donna (Texas) | 5,043.74 mi (8,117.11 km) |
| Sintra to Dorado (Puerto Rico) | 3,659.42 mi (5,889.26 km) |
| Sintra to Doral (Florida) | 4,138.10 mi (6,659.63 km) |
| Sintra to Doraville (Georgia) | 4,061.75 mi (6,536.75 km) |
| Sintra to Dothan (Alabama) | 4,209.71 mi (6,774.88 km) |
| Sintra to Douglas (Arizona) | 5,385.68 mi (8,667.42 km) |
| Sintra to Douglas (Georgia) | 4,069.53 mi (6,549.28 km) |
| Sintra to Douglasville (Georgia) | 4,089.22 mi (6,580.97 km) |
| Sintra to Dover (Delaware) | 3,467.98 mi (5,581.17 km) |
| Sintra to Dover (New Hampshire) | 3,148.74 mi (5,067.41 km) |
