| Southborough to South Plainfield (New Jersey) | 3,507.63 mi (5,644.98 km) |
| Southborough to South Portland (Maine) | 3,211.69 mi (5,168.72 km) |
| Southborough to South Riding (Virginia) | 3,707.67 mi (5,966.91 km) |
| Southborough to South River (New Jersey) | 3,511.70 mi (5,651.54 km) |
| Southborough to South Salt Lake (Utah) | 4,892.84 mi (7,874.26 km) |
| Southborough to South San Francisco (California) | 5,390.18 mi (8,674.66 km) |
| Southborough to South San Jose Hills (California) | 5,460.51 mi (8,787.84 km) |
| Southborough to South Sioux City (Nebraska) | 4,272.25 mi (6,875.52 km) |
| Southborough to South St. Paul (Minnesota) | 4,034.72 mi (6,493.25 km) |
| Southborough to South Valley (New Mexico) | 5,024.09 mi (8,085.50 km) |
| Southborough to South Venice (Florida) | 4,479.29 mi (7,208.72 km) |
| Southborough to South Whittier (California) | 5,469.10 mi (8,801.66 km) |
| Southborough to South Yarmouth (Massachusetts) | 3,287.89 mi (5,291.35 km) |
| Southborough to Southaven (Mississippi) | 4,397.01 mi (7,076.31 km) |
| Southborough to Southchase (Florida) | 4,369.29 mi (7,031.70 km) |
