| Middlesex to Ashtabula (Ohio) | 339.36 mi (546.15 km) |
| Middlesex to Ashwaubenon (Wisconsin) | 741.50 mi (1,193.32 km) |
| Middlesex to Aspen Hill (Maryland) | 170.99 mi (275.18 km) |
| Middlesex to Astoria (Oregon) | 2,465.63 mi (3,968.06 km) |
| Middlesex to Atascadero (California) | 2,509.20 mi (4,038.16 km) |
| Middlesex to Atascocita (Texas) | 1,372.55 mi (2,208.90 km) |
| Middlesex to Atchison (Kansas) | 1,090.85 mi (1,755.56 km) |
| Middlesex to Athens (Alabama) | 788.48 mi (1,268.94 km) |
| Middlesex to Athens (Georgia) | 668.08 mi (1,075.17 km) |
| Middlesex to Athens (Ohio) | 411.40 mi (662.09 km) |
| Middlesex to Athens (Tennessee) | 653.15 mi (1,051.14 km) |
| Middlesex to Athens (Texas) | 1,315.20 mi (2,116.61 km) |
| Middlesex to Atlanta (Georgia) | 720.16 mi (1,158.98 km) |
| Middlesex to Atlantic Beach (Florida) | 806.54 mi (1,298.00 km) |
| Middlesex to Atlantic City (New Jersey) | 82.59 mi (132.91 km) |
