| Napa to Cadillac (Michigan) | 1,941.83 mi (3,125.07 km) |
| Napa to Caguas (Puerto Rico) | 3,631.75 mi (5,844.74 km) |
| Napa to Cahokia (Illinois) | 1,729.71 mi (2,783.70 km) |
| Napa to Calabasas (California) | 351.50 mi (565.69 km) |
| Napa to Caldwell (Idaho) | 472.14 mi (759.83 km) |
| Napa to Caledonia (Wisconsin) | 1,820.90 mi (2,930.45 km) |
| Napa to Calera (Alabama) | 2,013.80 mi (3,240.89 km) |
| Napa to Calexico (California) | 544.66 mi (876.54 km) |
| Napa to Calhoun (Georgia) | 2,080.36 mi (3,348.01 km) |
| Napa to California (Maryland) | 2,457.48 mi (3,954.93 km) |
| Napa to California City (California) | 327.36 mi (526.83 km) |
| Napa to Callaway (Florida) | 2,158.38 mi (3,473.58 km) |
| Napa to Calumet City (Illinois) | 1,842.13 mi (2,964.61 km) |
| Napa to Calverton (Maryland) | 2,420.95 mi (3,896.14 km) |
| Napa to Camano (Washington) | 683.32 mi (1,099.69 km) |
