| Sintra to Dallas (Texas) | 4,720.82 mi (7,597.43 km) |
| Sintra to Dalton (Georgia) | 4,068.76 mi (6,548.03 km) |
| Sintra to Daly City (California) | 5,657.23 mi (9,104.42 km) |
| Sintra to Damascus (Maryland) | 3,548.17 mi (5,710.23 km) |
| Sintra to Damascus (Oregon) | 5,291.05 mi (8,515.12 km) |
| Sintra to Dana Point (California) | 5,656.81 mi (9,103.76 km) |
| Sintra to Danbury (Connecticut) | 3,312.42 mi (5,330.82 km) |
| Sintra to Dania Beach (Florida) | 4,119.07 mi (6,629.00 km) |
| Sintra to Danville (California) | 5,631.47 mi (9,062.97 km) |
| Sintra to Danville (Illinois) | 4,027.73 mi (6,482.01 km) |
| Sintra to Danville (Indiana) | 3,986.68 mi (6,415.94 km) |
| Sintra to Danville (Kentucky) | 3,967.97 mi (6,385.83 km) |
| Sintra to Danville (Virginia) | 3,733.55 mi (6,008.57 km) |
| Sintra to Daphne (Alabama) | 4,357.33 mi (7,012.44 km) |
| Sintra to Darby (Pennsylvania) | 3,435.83 mi (5,529.44 km) |
