| San Mateo to Arcata (California) | 247.37 mi (398.10 km) |
| San Mateo to Archdale (North Carolina) | 2,328.23 mi (3,746.93 km) |
| San Mateo to Arden-Arcade (California) | 88.34 mi (142.16 km) |
| San Mateo to Ardmore (Oklahoma) | 1,424.67 mi (2,292.78 km) |
| San Mateo to Ardmore (Pennsylvania) | 2,508.74 mi (4,037.42 km) |
| San Mateo to Arecibo (Puerto Rico) | 3,580.83 mi (5,762.79 km) |
| San Mateo to Arkadelphia (Arkansas) | 1,648.01 mi (2,652.22 km) |
| San Mateo to Arkansas City (Kansas) | 1,385.06 mi (2,229.03 km) |
| San Mateo to Arlington (Tennessee) | 1,813.09 mi (2,917.88 km) |
| San Mateo to Arlington (Texas) | 1,457.52 mi (2,345.65 km) |
| San Mateo to Arlington (Virginia) | 2,430.64 mi (3,911.73 km) |
| San Mateo to Arlington (Washington) | 733.67 mi (1,180.74 km) |
| San Mateo to Arlington Heights (Illinois) | 1,835.85 mi (2,954.51 km) |
| San Mateo to Arnold (Maryland) | 2,459.86 mi (3,958.76 km) |
| San Mateo to Arnold (Missouri) | 1,731.49 mi (2,786.57 km) |
