| San Marcos to Dallas (Oregon) | 877.86 mi (1,412.78 km) |
| San Marcos to Dallas (Texas) | 1,181.39 mi (1,901.27 km) |
| San Marcos to Dalton (Georgia) | 1,841.20 mi (2,963.13 km) |
| San Marcos to Daly City (California) | 433.16 mi (697.10 km) |
| San Marcos to Damascus (Maryland) | 2,250.18 mi (3,621.32 km) |
| San Marcos to Damascus (Oregon) | 894.06 mi (1,438.86 km) |
| San Marcos to Dana Point (California) | 38.16 mi (61.42 km) |
| San Marcos to Danbury (Connecticut) | 2,442.84 mi (3,931.38 km) |
| San Marcos to Dania Beach (Florida) | 2,264.39 mi (3,644.18 km) |
| San Marcos to Danville (California) | 420.86 mi (677.31 km) |
| San Marcos to Danville (Illinois) | 1,700.11 mi (2,736.06 km) |
| San Marcos to Danville (Indiana) | 1,755.61 mi (2,825.39 km) |
| San Marcos to Danville (Kentucky) | 1,841.84 mi (2,964.15 km) |
| San Marcos to Danville (Virginia) | 2,140.60 mi (3,444.97 km) |
| San Marcos to Daphne (Alabama) | 1,721.75 mi (2,770.89 km) |
