| San Marcos to Dixon (California) | 450.00 mi (724.21 km) |
| San Marcos to Dixon (Illinois) | 1,624.27 mi (2,614.01 km) |
| San Marcos to Dobbs Ferry (New York) | 2,422.64 mi (3,898.86 km) |
| San Marcos to Doctor Phillips (Florida) | 2,132.20 mi (3,431.45 km) |
| San Marcos to Dodge City (Kansas) | 1,015.39 mi (1,634.11 km) |
| San Marcos to Dolton (Illinois) | 1,716.37 mi (2,762.23 km) |
| San Marcos to Donna (Texas) | 1,242.99 mi (2,000.39 km) |
| San Marcos to Dorado (Puerto Rico) | 3,290.24 mi (5,295.13 km) |
| San Marcos to Doral (Florida) | 2,259.44 mi (3,636.22 km) |
| San Marcos to Doraville (Georgia) | 1,887.89 mi (3,038.26 km) |
| San Marcos to Dothan (Alabama) | 1,855.21 mi (2,985.67 km) |
| San Marcos to Douglas (Arizona) | 462.57 mi (744.43 km) |
| San Marcos to Douglas (Georgia) | 1,998.13 mi (3,215.69 km) |
| San Marcos to Douglasville (Georgia) | 1,864.77 mi (3,001.06 km) |
| San Marcos to Dover (Delaware) | 2,340.11 mi (3,766.04 km) |
