| Napa to Petersburg (Virginia) | 2,430.12 mi (3,910.90 km) |
| Napa to Pflugerville (Texas) | 1,503.48 mi (2,419.62 km) |
| Napa to Pharr (Texas) | 1,631.94 mi (2,626.35 km) |
| Napa to Phelan (California) | 376.26 mi (605.53 km) |
| Napa to Phenix City (Alabama) | 2,123.55 mi (3,417.53 km) |
| Napa to Philadelphia (Pennsylvania) | 2,500.16 mi (4,023.63 km) |
| Napa to Phillipsburg (New Jersey) | 2,487.55 mi (4,003.33 km) |
| Napa to Phoenix (Arizona) | 657.41 mi (1,058.00 km) |
| Napa to Phoenixville (Pennsylvania) | 2,478.30 mi (3,988.43 km) |
| Napa to Picayune (Mississippi) | 1,924.47 mi (3,097.13 km) |
| Napa to Pickerington (Ohio) | 2,105.46 mi (3,388.40 km) |
| Napa to Pico Rivera (California) | 379.12 mi (610.14 km) |
| Napa to Piedmont (California) | 33.05 mi (53.18 km) |
| Napa to Pierre (South Dakota) | 1,210.61 mi (1,948.30 km) |
| Napa to Pike Creek Valley (Delaware) | 2,475.28 mi (3,983.57 km) |
