| Napa to Portage (Michigan) | 1,939.45 mi (3,121.24 km) |
| Napa to Portage (Wisconsin) | 1,740.24 mi (2,800.64 km) |
| Napa to Portales (New Mexico) | 1,091.30 mi (1,756.28 km) |
| Napa to Porterville (California) | 236.94 mi (381.32 km) |
| Napa to Portland (Maine) | 2,694.21 mi (4,335.92 km) |
| Napa to Portland (Oregon) | 500.53 mi (805.52 km) |
| Napa to Portland (Tennessee) | 1,953.88 mi (3,144.47 km) |
| Napa to Portland (Texas) | 1,607.22 mi (2,586.57 km) |
| Napa to Portsmouth (New Hampshire) | 2,676.98 mi (4,308.18 km) |
| Napa to Portsmouth (Ohio) | 2,110.92 mi (3,397.20 km) |
| Napa to Portsmouth (Virginia) | 2,491.96 mi (4,010.43 km) |
| Napa to Post Falls (Idaho) | 704.80 mi (1,134.27 km) |
| Napa to Potomac (Maryland) | 2,408.83 mi (3,876.65 km) |
| Napa to Potomac Park (California) | 274.05 mi (441.05 km) |
| Napa to Pottstown (Pennsylvania) | 2,470.17 mi (3,975.36 km) |
