| San Marcos to Delaware (Ohio) | 1,939.32 mi (3,121.03 km) |
| San Marcos to Delhi (California) | 359.58 mi (578.69 km) |
| San Marcos to Delray Beach (Florida) | 2,258.78 mi (3,635.16 km) |
| San Marcos to Deltona (Florida) | 2,138.80 mi (3,442.07 km) |
| San Marcos to Deming (New Mexico) | 550.93 mi (886.63 km) |
| San Marcos to Denison (Texas) | 1,186.02 mi (1,908.71 km) |
| San Marcos to Dent (Ohio) | 1,850.77 mi (2,978.52 km) |
| San Marcos to Denton (Texas) | 1,156.72 mi (1,861.56 km) |
| San Marcos to Dentsville (South Carolina) | 2,074.33 mi (3,338.32 km) |
| San Marcos to Denver (Colorado) | 821.50 mi (1,322.07 km) |
| San Marcos to Depew (New York) | 2,178.64 mi (3,506.18 km) |
| San Marcos to Derby (Connecticut) | 2,463.04 mi (3,963.88 km) |
| San Marcos to Derby (Kansas) | 1,160.92 mi (1,868.32 km) |
| San Marcos to Des Moines (Iowa) | 1,413.39 mi (2,274.63 km) |
| San Marcos to Des Moines (Washington) | 1,021.04 mi (1,643.21 km) |
