| Southborough to Sugar Hill (Georgia) | 4,199.53 mi (6,758.50 km) |
| Southborough to Sugar Land (Texas) | 4,892.98 mi (7,874.49 km) |
| Southborough to Sugarland Run (Virginia) | 3,696.74 mi (5,949.33 km) |
| Southborough to Sugarmill Woods (Florida) | 4,398.69 mi (7,079.00 km) |
| Southborough to Suisun City (California) | 5,343.60 mi (8,599.69 km) |
| Southborough to Suitland (Maryland) | 3,686.28 mi (5,932.50 km) |
| Southborough to Sulphur (Louisiana) | 4,769.39 mi (7,675.60 km) |
| Southborough to Sulphur Springs (Texas) | 4,709.19 mi (7,578.71 km) |
| Southborough to Summerfield (Maryland) | 3,681.58 mi (5,924.93 km) |
| Southborough to Summerfield (North Carolina) | 3,929.81 mi (6,324.41 km) |
| Southborough to Summerlin South (Nevada) | 5,257.61 mi (8,461.30 km) |
| Southborough to Summerville (South Carolina) | 4,092.63 mi (6,586.45 km) |
| Southborough to Summit (Illinois) | 3,985.03 mi (6,413.29 km) |
| Southborough to Summit (New Jersey) | 3,499.50 mi (5,631.90 km) |
| Southborough to Sumner (Washington) | 4,833.19 mi (7,778.27 km) |
