| South Portland to Abilene (Texas) | 1,766.14 mi (2,842.33 km) |
| South Portland to Accokeek (Maryland) | 488.80 mi (786.65 km) |
| South Portland to Acworth (Georgia) | 1,015.52 mi (1,634.32 km) |
| South Portland to Ada (Oklahoma) | 1,531.00 mi (2,463.90 km) |
| South Portland to Addison (Illinois) | 904.43 mi (1,455.54 km) |
| South Portland to Addison (Texas) | 1,607.55 mi (2,587.11 km) |
| South Portland to Adelanto (California) | 2,567.81 mi (4,132.49 km) |
| South Portland to Adelphi (Maryland) | 471.20 mi (758.33 km) |
| South Portland to Adrian (Michigan) | 707.05 mi (1,137.89 km) |
| South Portland to Affton (Missouri) | 1,097.62 mi (1,766.45 km) |
| South Portland to Agoura Hills (California) | 2,648.16 mi (4,261.80 km) |
| South Portland to Aguadilla (Puerto Rico) | 1,750.19 mi (2,816.66 km) |
| South Portland to Aiken (South Carolina) | 930.23 mi (1,497.05 km) |
| South Portland to Akron (Ohio) | 599.43 mi (964.69 km) |
| South Portland to Alabaster (Alabama) | 1,144.46 mi (1,841.83 km) |
