| Southborough to Ashwaubenon (Wisconsin) | 3,872.10 mi (6,231.54 km) |
| Southborough to Aspen Hill (Maryland) | 3,681.96 mi (5,925.55 km) |
| Southborough to Astoria (Oregon) | 4,933.92 mi (7,940.37 km) |
| Southborough to Atascadero (California) | 5,463.77 mi (8,793.09 km) |
| Southborough to Atascocita (Texas) | 4,855.59 mi (7,814.32 km) |
| Southborough to Atchison (Kansas) | 4,368.02 mi (7,029.65 km) |
| Southborough to Athens (Alabama) | 4,284.22 mi (6,894.78 km) |
| Southborough to Athens (Georgia) | 4,178.97 mi (6,725.40 km) |
| Southborough to Athens (Ohio) | 3,874.50 mi (6,235.41 km) |
| Southborough to Athens (Tennessee) | 4,156.94 mi (6,689.95 km) |
| Southborough to Athens (Texas) | 4,765.87 mi (7,669.93 km) |
| Southborough to Atlanta (Georgia) | 4,231.22 mi (6,809.49 km) |
| Southborough to Atlantic Beach (Florida) | 4,273.53 mi (6,877.57 km) |
| Southborough to Atlantic City (New Jersey) | 3,561.18 mi (5,731.16 km) |
| Southborough to Attleboro (Massachusetts) | 3,322.14 mi (5,346.47 km) |
