| Napa to Johnstown (Pennsylvania) | 2,300.06 mi (3,701.59 km) |
| Napa to Joliet (Illinois) | 1,811.74 mi (2,915.71 km) |
| Napa to Jonesboro (Arkansas) | 1,743.41 mi (2,805.74 km) |
| Napa to Joplin (Missouri) | 1,516.63 mi (2,440.78 km) |
| Napa to Joppatowne (Maryland) | 2,446.30 mi (3,936.94 km) |
| Napa to Juana Díaz (Puerto Rico) | 3,613.70 mi (5,815.68 km) |
| Napa to Junction City (Kansas) | 1,369.50 mi (2,204.00 km) |
| Napa to Juneau (Alaska) | 1,490.36 mi (2,398.51 km) |
| Napa to Jupiter (Florida) | 2,553.59 mi (4,109.61 km) |
| Napa to Jupiter Farms (Florida) | 2,547.79 mi (4,100.27 km) |
| Napa to Jurupa Valley (California) | 400.81 mi (645.04 km) |
| Napa to Justice (Illinois) | 1,826.81 mi (2,939.97 km) |
| Napa to Kahului (Hawaii) | 2,359.37 mi (3,797.04 km) |
| Napa to Kailua (Hawaii) | 2,402.65 mi (3,866.70 km) |
| Napa to Kalamazoo (Michigan) | 1,939.18 mi (3,120.80 km) |
