| San Marcos to Port Charlotte (Florida) | 2,128.82 mi (3,426.00 km) |
| San Marcos to Port Chester (New York) | 2,433.16 mi (3,915.79 km) |
| San Marcos to Port Hueneme (California) | 136.58 mi (219.81 km) |
| San Marcos to Port Huron (Michigan) | 1,991.61 mi (3,205.19 km) |
| San Marcos to Port Lavaca (Texas) | 1,255.45 mi (2,020.45 km) |
| San Marcos to Port Neches (Texas) | 1,381.98 mi (2,224.09 km) |
| San Marcos to Port Orange (Florida) | 2,146.28 mi (3,454.10 km) |
| San Marcos to Port Orchard (Washington) | 1,034.14 mi (1,664.29 km) |
| San Marcos to Port Royal (South Carolina) | 2,109.36 mi (3,394.69 km) |
| San Marcos to Port Salerno (Florida) | 2,236.50 mi (3,599.30 km) |
| San Marcos to Port St. John (Florida) | 2,171.00 mi (3,493.89 km) |
| San Marcos to Port St. Lucie (Florida) | 2,221.88 mi (3,575.77 km) |
| San Marcos to Port Washington (New York) | 2,433.04 mi (3,915.60 km) |
| San Marcos to Port Washington (Wisconsin) | 1,727.93 mi (2,780.83 km) |
| San Marcos to Port Wentworth (Georgia) | 2,083.19 mi (3,352.57 km) |
