| Southborough to Rockville (Maryland) | 3,685.35 mi (5,931.01 km) |
| Southborough to Rockville Centre (New York) | 3,471.90 mi (5,587.49 km) |
| Southborough to Rockwall (Texas) | 4,752.78 mi (7,648.85 km) |
| Southborough to Rocky Mount (North Carolina) | 3,853.84 mi (6,202.16 km) |
| Southborough to Rocky Point (New York) | 3,431.46 mi (5,522.40 km) |
| Southborough to Rocky River (Ohio) | 3,767.76 mi (6,063.63 km) |
| Southborough to Roessleville (New York) | 3,392.39 mi (5,459.53 km) |
| Southborough to Rogers (Arkansas) | 4,492.13 mi (7,229.38 km) |
| Southborough to Rogers (Minnesota) | 4,039.98 mi (6,501.72 km) |
| Southborough to Rohnert Park (California) | 5,357.92 mi (8,622.75 km) |
| Southborough to Rolla (Missouri) | 4,319.56 mi (6,951.65 km) |
| Southborough to Rolling Meadows (Illinois) | 3,979.77 mi (6,404.83 km) |
| Southborough to Roma (Texas) | 5,193.39 mi (8,357.96 km) |
| Southborough to Rome (Georgia) | 4,238.00 mi (6,820.40 km) |
| Southborough to Rome (New York) | 3,438.61 mi (5,533.90 km) |
