| Middlesex to Portage (Michigan) | 585.28 mi (941.91 km) |
| Middlesex to Portage (Wisconsin) | 793.44 mi (1,276.91 km) |
| Middlesex to Portales (New Mexico) | 1,636.67 mi (2,633.97 km) |
| Middlesex to Porterville (California) | 2,408.29 mi (3,875.77 km) |
| Middlesex to Portland (Maine) | 304.78 mi (490.50 km) |
| Middlesex to Portland (Oregon) | 2,418.01 mi (3,891.41 km) |
| Middlesex to Portland (Tennessee) | 704.47 mi (1,133.73 km) |
| Middlesex to Portland (Texas) | 1,563.31 mi (2,515.91 km) |
| Middlesex to Portsmouth (New Hampshire) | 257.07 mi (413.72 km) |
| Middlesex to Portsmouth (Ohio) | 466.16 mi (750.21 km) |
| Middlesex to Portsmouth (Virginia) | 276.23 mi (444.55 km) |
| Middlesex to Post Falls (Idaho) | 2,132.70 mi (3,432.26 km) |
| Middlesex to Potomac (Maryland) | 179.05 mi (288.15 km) |
| Middlesex to Potomac Park (California) | 2,422.61 mi (3,898.81 km) |
| Middlesex to Pottstown (Pennsylvania) | 64.17 mi (103.27 km) |
