| Napa to Clarksdale (Mississippi) | 1,781.86 mi (2,867.62 km) |
| Napa to Clarkston (Georgia) | 2,133.33 mi (3,433.26 km) |
| Napa to Clarksville (Indiana) | 1,967.50 mi (3,166.38 km) |
| Napa to Clarksville (Tennessee) | 1,910.34 mi (3,074.39 km) |
| Napa to Clawson (Michigan) | 2,061.62 mi (3,317.85 km) |
| Napa to Clay (Alabama) | 2,007.72 mi (3,231.12 km) |
| Napa to Clayton (California) | 31.86 mi (51.28 km) |
| Napa to Clayton (Missouri) | 1,720.77 mi (2,769.31 km) |
| Napa to Clayton (North Carolina) | 2,404.62 mi (3,869.86 km) |
| Napa to Clayton (Ohio) | 2,024.06 mi (3,257.41 km) |
| Napa to Clearfield (Utah) | 579.27 mi (932.24 km) |
| Napa to Clearlake (California) | 49.09 mi (79.00 km) |
| Napa to Clearwater (Florida) | 2,375.87 mi (3,823.59 km) |
| Napa to Cleburne (Texas) | 1,456.55 mi (2,344.09 km) |
| Napa to Clemmons (North Carolina) | 2,293.41 mi (3,690.88 km) |
