| San Marcos to Yonkers (New York) | 2,422.86 mi (3,899.22 km) |
| San Marcos to Yorba Linda (California) | 62.43 mi (100.47 km) |
| San Marcos to York (Pennsylvania) | 2,273.70 mi (3,659.17 km) |
| San Marcos to Yorktown (Indiana) | 1,810.56 mi (2,913.82 km) |
| San Marcos to Yorkville (Illinois) | 1,673.47 mi (2,693.19 km) |
| San Marcos to Youngstown (Ohio) | 2,069.84 mi (3,331.08 km) |
| San Marcos to Youngsville (Louisiana) | 1,492.56 mi (2,402.04 km) |
| San Marcos to Ypsilanti (Michigan) | 1,924.92 mi (3,097.86 km) |
| San Marcos to Yuba City (California) | 483.52 mi (778.15 km) |
| San Marcos to Yucaipa (California) | 62.55 mi (100.66 km) |
| San Marcos to Yucca Valley (California) | 80.86 mi (130.14 km) |
| San Marcos to Yukon (Oklahoma) | 1,117.87 mi (1,799.03 km) |
| San Marcos to Yulee (Florida) | 2,086.12 mi (3,357.29 km) |
| San Marcos to Yuma (Arizona) | 156.77 mi (252.30 km) |
| San Marcos to Zachary (Louisiana) | 1,531.34 mi (2,464.45 km) |
