| Southborough to Pell City (Alabama) | 4,316.29 mi (6,946.40 km) |
| Southborough to Pella (Iowa) | 4,195.61 mi (6,752.18 km) |
| Southborough to Pembroke Pines (Florida) | 4,442.86 mi (7,150.09 km) |
| Southborough to Pendleton (Oregon) | 4,827.32 mi (7,768.82 km) |
| Southborough to Pensacola (Florida) | 4,508.47 mi (7,255.68 km) |
| Southborough to Peoria (Arizona) | 5,287.01 mi (8,508.62 km) |
| Southborough to Peoria (Illinois) | 4,102.29 mi (6,602.00 km) |
| Southborough to Perris (California) | 5,451.13 mi (8,772.74 km) |
| Southborough to Perry (Georgia) | 4,265.49 mi (6,864.65 km) |
| Southborough to Perry Hall (Maryland) | 3,643.24 mi (5,863.23 km) |
| Southborough to Perrysburg (Ohio) | 3,835.05 mi (6,171.92 km) |
| Southborough to Perth Amboy (New Jersey) | 3,504.13 mi (5,639.35 km) |
| Southborough to Peru (Indiana) | 3,965.60 mi (6,382.01 km) |
| Southborough to Petal (Mississippi) | 4,546.57 mi (7,317.00 km) |
| Southborough to Petaluma (California) | 5,362.03 mi (8,629.35 km) |
