| Southborough to Joliet (Illinois) | 4,010.34 mi (6,454.01 km) |
| Southborough to Jonesboro (Arkansas) | 4,381.77 mi (7,051.78 km) |
| Southborough to Joplin (Missouri) | 4,467.56 mi (7,189.84 km) |
| Southborough to Joppatowne (Maryland) | 3,637.56 mi (5,854.09 km) |
| Southborough to Juana Díaz (Puerto Rico) | 4,251.89 mi (6,842.76 km) |
| Southborough to Junction City (Kansas) | 4,458.25 mi (7,174.86 km) |
| Southborough to Juneau (Alaska) | 4,440.89 mi (7,146.92 km) |
| Southborough to Jupiter (Florida) | 4,387.81 mi (7,061.50 km) |
| Southborough to Jupiter Farms (Florida) | 4,392.22 mi (7,068.59 km) |
| Southborough to Jurupa Valley (California) | 5,447.13 mi (8,766.31 km) |
| Southborough to Justice (Illinois) | 3,987.56 mi (6,417.36 km) |
| Southborough to Kahului (Hawaii) | 7,262.96 mi (11,688.60 km) |
| Southborough to Kailua (Hawaii) | 7,248.74 mi (11,665.72 km) |
| Southborough to Kalamazoo (Michigan) | 3,877.25 mi (6,239.84 km) |
| Southborough to Kalispell (Montana) | 4,559.55 mi (7,337.88 km) |
