| Southborough to Red Bank (New Jersey) | 3,503.14 mi (5,637.76 km) |
| Southborough to Red Bank (Tennessee) | 4,201.58 mi (6,761.79 km) |
| Southborough to Red Bluff (California) | 5,238.73 mi (8,430.93 km) |
| Southborough to Red Hill (South Carolina) | 4,006.83 mi (6,448.37 km) |
| Southborough to Red Oak (Texas) | 4,786.69 mi (7,703.43 km) |
| Southborough to Red Wing (Minnesota) | 4,033.25 mi (6,490.89 km) |
| Southborough to Redan (Georgia) | 4,221.81 mi (6,794.35 km) |
| Southborough to Redding (California) | 5,219.34 mi (8,399.71 km) |
| Southborough to Redland (Maryland) | 3,682.74 mi (5,926.79 km) |
| Southborough to Redlands (California) | 5,434.56 mi (8,746.08 km) |
| Southborough to Redmond (Oregon) | 4,973.54 mi (8,004.14 km) |
| Southborough to Redmond (Washington) | 4,804.01 mi (7,731.31 km) |
| Southborough to Redondo Beach (California) | 5,484.55 mi (8,826.53 km) |
| Southborough to Redwood City (California) | 5,393.23 mi (8,679.57 km) |
| Southborough to Reedley (California) | 5,361.25 mi (8,628.11 km) |
