| Southborough to Archdale (North Carolina) | 3,945.99 mi (6,350.45 km) |
| Southborough to Arden-Arcade (California) | 5,304.62 mi (8,536.97 km) |
| Southborough to Ardmore (Oklahoma) | 4,713.65 mi (7,585.88 km) |
| Southborough to Ardmore (Pennsylvania) | 3,568.50 mi (5,742.95 km) |
| Southborough to Arecibo (Puerto Rico) | 4,241.36 mi (6,825.80 km) |
| Southborough to Arkadelphia (Arkansas) | 4,560.16 mi (7,338.87 km) |
| Southborough to Arkansas City (Kansas) | 4,563.67 mi (7,344.51 km) |
| Southborough to Arlington (Tennessee) | 4,369.53 mi (7,032.08 km) |
| Southborough to Arlington (Texas) | 4,790.57 mi (7,709.68 km) |
| Southborough to Arlington (Virginia) | 3,692.29 mi (5,942.17 km) |
| Southborough to Arlington (Washington) | 4,776.60 mi (7,687.20 km) |
| Southborough to Arlington Heights (Illinois) | 3,977.19 mi (6,400.67 km) |
| Southborough to Arnold (Maryland) | 3,660.16 mi (5,890.47 km) |
| Southborough to Arnold (Missouri) | 4,242.51 mi (6,827.65 km) |
| Southborough to Arroyo Grande (California) | 5,481.37 mi (8,821.41 km) |
