| Sintra to Dover (New Jersey) | 3,377.76 mi (5,435.98 km) |
| Sintra to Dover (Ohio) | 3,723.47 mi (5,992.34 km) |
| Sintra to Downers Grove (Illinois) | 3,996.94 mi (6,432.45 km) |
| Sintra to Downey (California) | 5,654.09 mi (9,099.38 km) |
| Sintra to Dranesville (Virginia) | 3,564.06 mi (5,735.80 km) |
| Sintra to Draper (Utah) | 5,099.42 mi (8,206.72 km) |
| Sintra to Drexel Heights (Arizona) | 5,421.15 mi (8,724.49 km) |
| Sintra to Drexel Hill (Pennsylvania) | 3,437.23 mi (5,531.69 km) |
| Sintra to Duarte (California) | 5,636.11 mi (9,070.45 km) |
| Sintra to Dublin (California) | 5,633.09 mi (9,065.59 km) |
| Sintra to Dublin (Georgia) | 4,038.84 mi (6,499.88 km) |
| Sintra to Dublin (Ohio) | 3,815.39 mi (6,140.27 km) |
| Sintra to Dubuque (Iowa) | 4,099.50 mi (6,597.51 km) |
| Sintra to Duluth (Georgia) | 4,052.38 mi (6,521.68 km) |
| Sintra to Duluth (Minnesota) | 4,035.30 mi (6,494.18 km) |
