| South Portland to Arroyo Grande (California) | 2,706.93 mi (4,356.38 km) |
| South Portland to Artesia (California) | 2,623.73 mi (4,222.48 km) |
| South Portland to Artesia (New Mexico) | 1,979.43 mi (3,185.58 km) |
| South Portland to Artondale (Washington) | 2,501.40 mi (4,025.62 km) |
| South Portland to Arvada (Colorado) | 1,803.11 mi (2,901.83 km) |
| South Portland to Arvin (California) | 2,617.22 mi (4,212.00 km) |
| South Portland to Asbury Lake (Florida) | 1,131.10 mi (1,820.33 km) |
| South Portland to Asbury Park (New Jersey) | 303.37 mi (488.22 km) |
| South Portland to Ashburn (Virginia) | 489.57 mi (787.89 km) |
| South Portland to Asheboro (North Carolina) | 744.37 mi (1,197.95 km) |
| South Portland to Asheville (North Carolina) | 856.52 mi (1,378.43 km) |
| South Portland to Ashland (California) | 2,702.59 mi (4,349.41 km) |
| South Portland to Ashland (Kentucky) | 735.25 mi (1,183.27 km) |
| South Portland to Ashland (Ohio) | 643.36 mi (1,035.38 km) |
| South Portland to Ashland (Oregon) | 2,609.22 mi (4,199.13 km) |
