| San Marino to Darby (Pennsylvania) | 2,374.55 mi (3,821.47 km) |
| San Marino to Dardenne Prairie (Missouri) | 1,549.15 mi (2,493.11 km) |
| San Marino to Darien (Illinois) | 1,714.20 mi (2,758.74 km) |
| San Marino to Davenport (Iowa) | 1,578.41 mi (2,540.21 km) |
| San Marino to Davidson (North Carolina) | 2,105.00 mi (3,387.67 km) |
| San Marino to Davie (Florida) | 2,314.37 mi (3,724.62 km) |
| San Marino to Davis (California) | 366.65 mi (590.06 km) |
| San Marino to Dayton (Nevada) | 363.91 mi (585.65 km) |
| San Marino to Dayton (Ohio) | 1,901.00 mi (3,059.36 km) |
| San Marino to Daytona Beach (Florida) | 2,191.23 mi (3,526.44 km) |
| San Marino to De Pere (Wisconsin) | 1,744.38 mi (2,807.31 km) |
| San Marino to De Witt (New York) | 2,326.10 mi (3,743.50 km) |
| San Marino to Dearborn (Michigan) | 1,961.81 mi (3,157.24 km) |
| San Marino to Dearborn Heights (Michigan) | 1,958.59 mi (3,152.04 km) |
| San Marino to DeBary (Florida) | 2,185.39 mi (3,517.05 km) |
