| Southborough to Robertsville (New Jersey) | 3,512.82 mi (5,653.34 km) |
| Southborough to Robinson (Texas) | 4,855.04 mi (7,813.43 km) |
| Southborough to Robstown (Texas) | 5,067.63 mi (8,155.57 km) |
| Southborough to Rochester (Michigan) | 3,763.22 mi (6,056.32 km) |
| Southborough to Rochester (Minnesota) | 4,055.25 mi (6,526.29 km) |
| Southborough to Rochester (New Hampshire) | 3,253.15 mi (5,235.43 km) |
| Southborough to Rochester (New York) | 3,525.89 mi (5,674.37 km) |
| Southborough to Rochester Hills (Michigan) | 3,765.62 mi (6,060.18 km) |
| Southborough to Rock Hill (South Carolina) | 4,035.15 mi (6,493.95 km) |
| Southborough to Rock Island (Illinois) | 4,105.01 mi (6,606.37 km) |
| Southborough to Rock Springs (Wyoming) | 4,757.88 mi (7,657.06 km) |
| Southborough to Rockford (Illinois) | 4,010.60 mi (6,454.44 km) |
| Southborough to Rockledge (Florida) | 4,344.55 mi (6,991.88 km) |
| Southborough to Rocklin (California) | 5,288.73 mi (8,511.38 km) |
| Southborough to Rockport (Texas) | 5,031.61 mi (8,097.59 km) |
