| Middlesex to Arcata (California) | 2,560.35 mi (4,120.49 km) |
| Middlesex to Archdale (North Carolina) | 437.88 mi (704.69 km) |
| Middlesex to Arden-Arcade (California) | 2,470.42 mi (3,975.76 km) |
| Middlesex to Ardmore (Oklahoma) | 1,313.48 mi (2,113.84 km) |
| Middlesex to Ardmore (Pennsylvania) | 57.50 mi (92.54 km) |
| Middlesex to Arecibo (Puerto Rico) | 1,596.68 mi (2,569.60 km) |
| Middlesex to Arkadelphia (Arkansas) | 1,110.26 mi (1,786.80 km) |
| Middlesex to Arkansas City (Kansas) | 1,233.48 mi (1,985.09 km) |
| Middlesex to Arlington (Tennessee) | 903.01 mi (1,453.25 km) |
| Middlesex to Arlington (Texas) | 1,362.14 mi (2,192.15 km) |
| Middlesex to Arlington (Virginia) | 181.14 mi (291.52 km) |
| Middlesex to Arlington (Washington) | 2,370.90 mi (3,815.60 km) |
| Middlesex to Arlington Heights (Illinois) | 706.50 mi (1,137.00 km) |
| Middlesex to Arnold (Maryland) | 149.70 mi (240.92 km) |
| Middlesex to Arnold (Missouri) | 857.83 mi (1,380.55 km) |
