| San Marcos to Arcata (California) | 655.27 mi (1,054.55 km) |
| San Marcos to Archdale (North Carolina) | 2,114.48 mi (3,402.93 km) |
| San Marcos to Arden-Arcade (California) | 445.11 mi (716.33 km) |
| San Marcos to Ardmore (Oklahoma) | 1,153.39 mi (1,856.19 km) |
| San Marcos to Ardmore (Pennsylvania) | 2,349.67 mi (3,781.44 km) |
| San Marcos to Arecibo (Puerto Rico) | 3,263.92 mi (5,252.77 km) |
| San Marcos to Arkadelphia (Arkansas) | 1,385.01 mi (2,228.96 km) |
| San Marcos to Arkansas City (Kansas) | 1,167.82 mi (1,879.42 km) |
| San Marcos to Arlington (Tennessee) | 1,573.72 mi (2,532.66 km) |
| San Marcos to Arlington (Texas) | 1,161.49 mi (1,869.24 km) |
| San Marcos to Arlington (Virginia) | 2,256.26 mi (3,631.11 km) |
| San Marcos to Arlington (Washington) | 1,070.40 mi (1,722.64 km) |
| San Marcos to Arlington Heights (Illinois) | 1,703.09 mi (2,740.87 km) |
| San Marcos to Arnold (Maryland) | 2,288.16 mi (3,682.45 km) |
| San Marcos to Arnold (Missouri) | 1,540.19 mi (2,478.70 km) |
