| San Marcos to Wichita (Kansas) | 1,157.62 mi (1,863.01 km) |
| San Marcos to Wichita Falls (Texas) | 1,073.85 mi (1,728.20 km) |
| San Marcos to Wickliffe (Ohio) | 2,029.89 mi (3,266.79 km) |
| San Marcos to Wildomar (California) | 33.67 mi (54.19 km) |
| San Marcos to Wildwood (Florida) | 2,095.54 mi (3,372.44 km) |
| San Marcos to Wildwood (Missouri) | 1,525.29 mi (2,454.72 km) |
| San Marcos to Wilkes-Barre (Pennsylvania) | 2,318.11 mi (3,730.63 km) |
| San Marcos to Wilkinsburg (Pennsylvania) | 2,108.15 mi (3,392.74 km) |
| San Marcos to Williamsburg (Virginia) | 2,285.05 mi (3,677.43 km) |
| San Marcos to Williamsport (Pennsylvania) | 2,257.79 mi (3,633.56 km) |
| San Marcos to Williamstown (New Jersey) | 2,367.26 mi (3,809.73 km) |
| San Marcos to Willimantic (Connecticut) | 2,507.51 mi (4,035.45 km) |
| San Marcos to Williston (North Dakota) | 1,254.58 mi (2,019.04 km) |
| San Marcos to Willmar (Minnesota) | 1,438.35 mi (2,314.80 km) |
| San Marcos to Willoughby (Ohio) | 2,033.24 mi (3,272.18 km) |
