| San Marcos to Willow Grove (Pennsylvania) | 2,358.74 mi (3,796.02 km) |
| San Marcos to Willowbrook (California) | 81.76 mi (131.58 km) |
| San Marcos to Willowick (Ohio) | 2,030.11 mi (3,267.15 km) |
| San Marcos to Wilmette (Illinois) | 1,715.62 mi (2,761.03 km) |
| San Marcos to Wilmington (Delaware) | 2,337.21 mi (3,761.37 km) |
| San Marcos to Wilmington (North Carolina) | 2,246.19 mi (3,614.90 km) |
| San Marcos to Wilmington (Ohio) | 1,896.77 mi (3,052.55 km) |
| San Marcos to Wilmington Island (Georgia) | 2,098.74 mi (3,377.59 km) |
| San Marcos to Wilson (North Carolina) | 2,228.87 mi (3,587.02 km) |
| San Marcos to Wilsonville (Oregon) | 892.42 mi (1,436.21 km) |
| San Marcos to Wilton Manors (Florida) | 2,263.28 mi (3,642.39 km) |
| San Marcos to Wimauma (Florida) | 2,101.58 mi (3,382.17 km) |
| San Marcos to Winchester (Kentucky) | 1,873.89 mi (3,015.74 km) |
| San Marcos to Winchester (Nevada) | 237.52 mi (382.24 km) |
| San Marcos to Winchester (Virginia) | 2,197.99 mi (3,537.32 km) |
