| San Marino to Dallas (Oregon) | 795.54 mi (1,280.30 km) |
| San Marino to Dallas (Texas) | 1,231.68 mi (1,982.19 km) |
| San Marino to Dalton (Georgia) | 1,880.24 mi (3,025.96 km) |
| San Marino to Daly City (California) | 346.39 mi (557.46 km) |
| San Marino to Damascus (Maryland) | 2,275.01 mi (3,661.27 km) |
| San Marino to Damascus (Oregon) | 813.64 mi (1,309.43 km) |
| San Marino to Dana Point (California) | 50.83 mi (81.80 km) |
| San Marino to Danbury (Connecticut) | 2,461.77 mi (3,961.84 km) |
| San Marino to Dania Beach (Florida) | 2,321.94 mi (3,736.80 km) |
| San Marino to Danville (California) | 333.85 mi (537.28 km) |
| San Marino to Danville (Illinois) | 1,721.71 mi (2,770.83 km) |
| San Marino to Danville (Indiana) | 1,778.78 mi (2,862.67 km) |
| San Marino to Danville (Kentucky) | 1,872.03 mi (3,012.73 km) |
| San Marino to Danville (Virginia) | 2,173.05 mi (3,497.19 km) |
| San Marino to Daphne (Alabama) | 1,774.07 mi (2,855.09 km) |
