| Parkway to Portage (Michigan) | 1,891.46 mi (3,044.01 km) |
| Parkway to Portage (Wisconsin) | 1,692.42 mi (2,723.69 km) |
| Parkway to Portales (New Mexico) | 1,048.51 mi (1,687.41 km) |
| Parkway to Porterville (California) | 214.41 mi (345.06 km) |
| Parkway to Portland (Maine) | 2,646.64 mi (4,259.35 km) |
| Parkway to Portland (Oregon) | 490.12 mi (788.77 km) |
| Parkway to Portland (Tennessee) | 1,906.49 mi (3,068.20 km) |
| Parkway to Portland (Texas) | 1,568.72 mi (2,524.62 km) |
| Parkway to Portsmouth (New Hampshire) | 2,629.28 mi (4,231.42 km) |
| Parkway to Portsmouth (Ohio) | 2,062.98 mi (3,320.05 km) |
| Parkway to Portsmouth (Virginia) | 2,444.09 mi (3,933.39 km) |
| Parkway to Post Falls (Idaho) | 676.32 mi (1,088.43 km) |
| Parkway to Potomac (Maryland) | 2,360.81 mi (3,799.36 km) |
| Parkway to Potomac Park (California) | 256.50 mi (412.80 km) |
| Parkway to Pottstown (Pennsylvania) | 2,422.14 mi (3,898.06 km) |
