| Southborough to Petersburg (Virginia) | 3,779.92 mi (6,083.20 km) |
| Southborough to Pflugerville (Texas) | 4,925.77 mi (7,927.26 km) |
| Southborough to Pharr (Texas) | 5,174.13 mi (8,326.96 km) |
| Southborough to Phelan (California) | 5,423.89 mi (8,728.91 km) |
| Southborough to Phenix City (Alabama) | 4,319.56 mi (6,951.66 km) |
| Southborough to Philadelphia (Pennsylvania) | 3,561.71 mi (5,732.03 km) |
| Southborough to Phillipsburg (New Jersey) | 3,534.05 mi (5,687.50 km) |
| Southborough to Phoenix (Arizona) | 5,291.59 mi (8,515.99 km) |
| Southborough to Phoenixville (Pennsylvania) | 3,571.94 mi (5,748.48 km) |
| Southborough to Picayune (Mississippi) | 4,605.33 mi (7,411.56 km) |
| Southborough to Pickerington (Ohio) | 3,875.50 mi (6,237.01 km) |
| Southborough to Pico Rivera (California) | 5,467.72 mi (8,799.45 km) |
| Southborough to Piedmont (California) | 5,374.78 mi (8,649.87 km) |
| Southborough to Pierre (South Dakota) | 4,315.55 mi (6,945.21 km) |
| Southborough to Pike Creek Valley (Delaware) | 3,597.08 mi (5,788.93 km) |
