| Southborough to Ukiah (California) | 5,326.31 mi (8,571.86 km) |
| Southborough to Union (Missouri) | 4,265.92 mi (6,865.33 km) |
| Southborough to Union City (California) | 5,381.24 mi (8,660.27 km) |
| Southborough to Union City (Georgia) | 4,245.17 mi (6,831.94 km) |
| Southborough to Union City (New Jersey) | 3,483.64 mi (5,606.37 km) |
| Southborough to Union City (Tennessee) | 4,287.88 mi (6,900.67 km) |
| Southborough to Union Hill-Novelty Hill (Washington) | 4,801.54 mi (7,727.34 km) |
| Southborough to Union Park (Florida) | 4,353.50 mi (7,006.28 km) |
| Southborough to Uniondale (New York) | 3,467.82 mi (5,580.92 km) |
| Southborough to Universal City (Texas) | 5,000.40 mi (8,047.36 km) |
| Southborough to University (Florida) | 4,428.37 mi (7,126.77 km) |
| Southborough to University City (Missouri) | 4,229.49 mi (6,806.71 km) |
| Southborough to University Heights (Ohio) | 3,754.12 mi (6,041.67 km) |
| Southborough to University of California-Santa Barbara (California) | 5,499.59 mi (8,850.73 km) |
| Southborough to University Park (Texas) | 4,769.98 mi (7,676.55 km) |
