| Southborough to Myrtle Grove (North Carolina) | 3,943.39 mi (6,346.27 km) |
| Southborough to Nacogdoches (Texas) | 4,749.90 mi (7,644.23 km) |
| Southborough to Nampa (Idaho) | 4,878.84 mi (7,851.73 km) |
| Southborough to Nanakuli (Hawaii) | 7,255.21 mi (11,676.13 km) |
| Southborough to Nanticoke (Pennsylvania) | 3,545.26 mi (5,705.54 km) |
| Southborough to Nanuet (New York) | 3,468.89 mi (5,582.64 km) |
| Southborough to Napa (California) | 5,349.27 mi (8,608.82 km) |
| Southborough to Naperville (Illinois) | 4,000.29 mi (6,437.84 km) |
| Southborough to Naples (Florida) | 4,497.87 mi (7,238.63 km) |
| Southborough to Naranja (Florida) | 4,471.41 mi (7,196.04 km) |
| Southborough to Nashua (New Hampshire) | 3,296.44 mi (5,305.11 km) |
| Southborough to Nashville (Tennessee) | 4,210.35 mi (6,775.90 km) |
| Southborough to Natchez (Mississippi) | 4,623.48 mi (7,440.78 km) |
| Southborough to Natchitoches (Louisiana) | 4,682.28 mi (7,535.41 km) |
| Southborough to National City (California) | 5,511.06 mi (8,869.19 km) |
