| Southborough to Pittsburg (Kansas) | 4,458.22 mi (7,174.81 km) |
| Southborough to Pittsburgh (Pennsylvania) | 3,739.11 mi (6,017.52 km) |
| Southborough to Pittsfield (Massachusetts) | 3,380.85 mi (5,440.96 km) |
| Southborough to Placentia (California) | 5,466.44 mi (8,797.39 km) |
| Southborough to Placerville (California) | 5,279.76 mi (8,496.95 km) |
| Southborough to Plainfield (Illinois) | 4,008.47 mi (6,451.02 km) |
| Southborough to Plainfield (Indiana) | 4,026.63 mi (6,480.23 km) |
| Southborough to Plainfield (New Jersey) | 3,505.90 mi (5,642.20 km) |
| Southborough to Plainview (New York) | 3,460.02 mi (5,568.37 km) |
| Southborough to Plainview (Texas) | 4,887.26 mi (7,865.29 km) |
| Southborough to Plano (Illinois) | 4,017.51 mi (6,465.55 km) |
| Southborough to Plano (Texas) | 4,757.96 mi (7,657.20 km) |
| Southborough to Plant City (Florida) | 4,418.30 mi (7,110.56 km) |
| Southborough to Plantation (Florida) | 4,433.92 mi (7,135.70 km) |
| Southborough to Platteville (Wisconsin) | 4,041.48 mi (6,504.14 km) |
