| San Marcos to Keene (New Hampshire) | 2,502.31 mi (4,027.09 km) |
| San Marcos to Keizer (Oregon) | 877.37 mi (1,411.98 km) |
| San Marcos to Keller (Texas) | 1,153.84 mi (1,856.93 km) |
| San Marcos to Kelso (Washington) | 946.93 mi (1,523.93 km) |
| San Marcos to Kemp Mill (Maryland) | 2,260.07 mi (3,637.23 km) |
| San Marcos to Ken Caryl (Colorado) | 804.12 mi (1,294.10 km) |
| San Marcos to Kendale Lakes (Florida) | 2,259.23 mi (3,635.88 km) |
| San Marcos to Kendall (Florida) | 2,263.24 mi (3,642.33 km) |
| San Marcos to Kendall Park (New Jersey) | 2,387.39 mi (3,842.14 km) |
| San Marcos to Kendall West (Florida) | 2,257.48 mi (3,633.07 km) |
| San Marcos to Kenmore (New York) | 2,170.56 mi (3,493.17 km) |
| San Marcos to Kenmore (Washington) | 1,043.97 mi (1,680.10 km) |
| San Marcos to Kenner (Louisiana) | 1,594.83 mi (2,566.62 km) |
| San Marcos to Kennesaw (Georgia) | 1,867.12 mi (3,004.85 km) |
| San Marcos to Kennett (Missouri) | 1,550.85 mi (2,495.85 km) |
