| South Portland to Arcata (California) | 2,709.15 mi (4,359.96 km) |
| South Portland to Archdale (North Carolina) | 739.81 mi (1,190.62 km) |
| South Portland to Arden-Arcade (California) | 2,640.08 mi (4,248.79 km) |
| South Portland to Ardmore (Oklahoma) | 1,574.00 mi (2,533.12 km) |
| South Portland to Ardmore (Pennsylvania) | 359.39 mi (578.38 km) |
| South Portland to Arecibo (Puerto Rico) | 1,752.12 mi (2,819.77 km) |
| South Portland to Arkadelphia (Arkansas) | 1,383.87 mi (2,227.13 km) |
| South Portland to Arkansas City (Kansas) | 1,472.07 mi (2,369.07 km) |
| South Portland to Arlington (Tennessee) | 1,180.57 mi (1,899.94 km) |
| South Portland to Arlington (Texas) | 1,631.61 mi (2,625.82 km) |
| South Portland to Arlington (Virginia) | 482.39 mi (776.34 km) |
| South Portland to Arlington (Washington) | 2,465.16 mi (3,967.29 km) |
| South Portland to Arlington Heights (Illinois) | 900.57 mi (1,449.32 km) |
| South Portland to Arnold (Maryland) | 451.60 mi (726.79 km) |
| South Portland to Arnold (Missouri) | 1,103.45 mi (1,775.83 km) |
