| San Marcos to Pittsburg (California) | 429.11 mi (690.59 km) |
| San Marcos to Pittsburg (Kansas) | 1,298.42 mi (2,089.61 km) |
| San Marcos to Pittsburgh (Pennsylvania) | 2,102.72 mi (3,384.01 km) |
| San Marcos to Pittsfield (Massachusetts) | 2,453.30 mi (3,948.20 km) |
| San Marcos to Placentia (California) | 64.76 mi (104.22 km) |
| San Marcos to Placerville (California) | 436.45 mi (702.41 km) |
| San Marcos to Plainfield (Illinois) | 1,684.42 mi (2,710.82 km) |
| San Marcos to Plainfield (Indiana) | 1,762.11 mi (2,835.84 km) |
| San Marcos to Plainfield (New Jersey) | 2,394.75 mi (3,853.97 km) |
| San Marcos to Plainview (New York) | 2,443.76 mi (3,932.85 km) |
| San Marcos to Plainview (Texas) | 890.67 mi (1,433.39 km) |
| San Marcos to Plano (Illinois) | 1,669.75 mi (2,687.21 km) |
| San Marcos to Plano (Texas) | 1,180.49 mi (1,899.81 km) |
| San Marcos to Plant City (Florida) | 2,105.14 mi (3,387.90 km) |
| San Marcos to Plantation (Florida) | 2,257.05 mi (3,632.37 km) |
