| Southborough to Accokeek (Maryland) | 3,697.38 mi (5,950.36 km) |
| Southborough to Acworth (Georgia) | 4,227.18 mi (6,802.99 km) |
| Southborough to Ada (Oklahoma) | 4,666.90 mi (7,510.65 km) |
| Southborough to Addison (Illinois) | 3,985.78 mi (6,414.49 km) |
| Southborough to Addison (Texas) | 4,766.02 mi (7,670.16 km) |
| Southborough to Adelanto (California) | 5,413.08 mi (8,711.52 km) |
| Southborough to Adelphi (Maryland) | 3,681.21 mi (5,924.33 km) |
| Southborough to Adrian (Michigan) | 3,834.47 mi (6,170.98 km) |
| Southborough to Affton (Missouri) | 4,234.88 mi (6,815.39 km) |
| Southborough to Agoura Hills (California) | 5,480.06 mi (8,819.30 km) |
| Southborough to Aguadilla (Puerto Rico) | 4,259.82 mi (6,855.51 km) |
| Southborough to Aiken (South Carolina) | 4,131.53 mi (6,649.06 km) |
| Southborough to Akron (Ohio) | 3,772.14 mi (6,070.68 km) |
| Southborough to Alabaster (Alabama) | 4,355.60 mi (7,009.66 km) |
| Southborough to Alachua (Florida) | 4,345.98 mi (6,994.18 km) |
