| Southborough to Rosemont (California) | 5,306.87 mi (8,540.59 km) |
| Southborough to Rosemount (Minnesota) | 4,042.23 mi (6,505.34 km) |
| Southborough to Rosenberg (Texas) | 4,902.86 mi (7,890.39 km) |
| Southborough to Roseville (California) | 5,292.97 mi (8,518.20 km) |
| Southborough to Roseville (Michigan) | 3,764.07 mi (6,057.68 km) |
| Southborough to Roseville (Minnesota) | 4,032.81 mi (6,490.18 km) |
| Southborough to Rossmoor (California) | 5,478.96 mi (8,817.54 km) |
| Southborough to Rossville (Maryland) | 3,645.38 mi (5,866.68 km) |
| Southborough to Roswell (Georgia) | 4,214.95 mi (6,783.30 km) |
| Southborough to Roswell (New Mexico) | 5,034.07 mi (8,101.56 km) |
| Southborough to Round Lake (Illinois) | 3,970.41 mi (6,389.76 km) |
| Southborough to Round Lake Beach (Illinois) | 3,967.83 mi (6,385.60 km) |
| Southborough to Round Rock (Texas) | 4,924.27 mi (7,924.84 km) |
| Southborough to Rowland Heights (California) | 5,462.41 mi (8,790.90 km) |
| Southborough to Rowlett (Texas) | 4,757.17 mi (7,655.92 km) |
