| San Marcos to Pottstown (Pennsylvania) | 2,330.74 mi (3,750.96 km) |
| San Marcos to Pottsville (Pennsylvania) | 2,300.68 mi (3,702.58 km) |
| San Marcos to Poughkeepsie (New York) | 2,419.35 mi (3,893.57 km) |
| San Marcos to Poulsbo (Washington) | 1,048.67 mi (1,687.68 km) |
| San Marcos to Poway (California) | 13.57 mi (21.84 km) |
| San Marcos to Powder Springs (Georgia) | 1,864.80 mi (3,001.10 km) |
| San Marcos to Powell (Ohio) | 1,938.33 mi (3,119.44 km) |
| San Marcos to Powell (Tennessee) | 1,886.90 mi (3,036.68 km) |
| San Marcos to Prairie Ridge (Washington) | 1,002.29 mi (1,613.03 km) |
| San Marcos to Prairie Village (Kansas) | 1,318.14 mi (2,121.34 km) |
| San Marcos to Prairieville (Louisiana) | 1,548.97 mi (2,492.82 km) |
| San Marcos to Prattville (Alabama) | 1,778.22 mi (2,861.77 km) |
| San Marcos to Preakness (New Jersey) | 2,404.25 mi (3,869.27 km) |
| San Marcos to Prescott (Arizona) | 289.08 mi (465.24 km) |
| San Marcos to Prescott Valley (Arizona) | 296.31 mi (476.87 km) |
