| San Marcos to Merriam (Kansas) | 1,315.54 mi (2,117.16 km) |
| San Marcos to Merrick (New York) | 2,439.86 mi (3,926.57 km) |
| San Marcos to Merrifield (Virginia) | 2,248.68 mi (3,618.89 km) |
| San Marcos to Merrillville (Indiana) | 1,728.67 mi (2,782.03 km) |
| San Marcos to Merritt Island (Florida) | 2,182.51 mi (3,512.41 km) |
| San Marcos to Mesa (Arizona) | 315.72 mi (508.10 km) |
| San Marcos to Mesquite (Nevada) | 306.37 mi (493.05 km) |
| San Marcos to Mesquite (Texas) | 1,192.06 mi (1,918.43 km) |
| San Marcos to Metairie (Louisiana) | 1,599.51 mi (2,574.16 km) |
| San Marcos to Methuen Town (Massachusetts) | 2,558.62 mi (4,117.71 km) |
| San Marcos to Metuchen (New Jersey) | 2,397.66 mi (3,858.66 km) |
| San Marcos to Mexico (Missouri) | 1,466.35 mi (2,359.87 km) |
| San Marcos to Miami (Florida) | 2,268.70 mi (3,651.12 km) |
| San Marcos to Miami (Oklahoma) | 1,285.36 mi (2,068.58 km) |
| San Marcos to Miami Beach (Florida) | 2,271.93 mi (3,656.31 km) |
