| Parkway to Owosso (Michigan) | 1,959.37 mi (3,153.30 km) |
| Parkway to Oxford (Alabama) | 2,003.74 mi (3,224.71 km) |
| Parkway to Oxford (Mississippi) | 1,788.08 mi (2,877.64 km) |
| Parkway to Oxford (Ohio) | 1,958.45 mi (3,151.82 km) |
| Parkway to Oxnard (California) | 323.01 mi (519.83 km) |
| Parkway to Oxon Hill (Maryland) | 2,376.07 mi (3,823.92 km) |
| Parkway to Ozark (Alabama) | 2,070.87 mi (3,332.74 km) |
| Parkway to Ozark (Missouri) | 1,539.47 mi (2,477.55 km) |
| Parkway to Pace (Florida) | 2,012.58 mi (3,238.93 km) |
| Parkway to Pacific Grove (California) | 132.50 mi (213.23 km) |
| Parkway to Pacifica (California) | 82.95 mi (133.50 km) |
| Parkway to Paducah (Kentucky) | 1,784.73 mi (2,872.24 km) |
| Parkway to Pahrump (Nevada) | 338.23 mi (544.33 km) |
| Parkway to Painesville (Ohio) | 2,116.47 mi (3,406.13 km) |
| Parkway to Palatine (Illinois) | 1,766.50 mi (2,842.90 km) |
