| Napa to Castle Pines (Colorado) | 939.50 mi (1,511.97 km) |
| Napa to Castle Rock (Colorado) | 940.49 mi (1,513.58 km) |
| Napa to Castro Valley (California) | 42.70 mi (68.71 km) |
| Napa to Catalina Foothills (Arizona) | 764.55 mi (1,230.42 km) |
| Napa to Cataño (Puerto Rico) | 3,618.00 mi (5,822.61 km) |
| Napa to Cathedral City (California) | 448.45 mi (721.72 km) |
| Napa to Catonsville (Maryland) | 2,428.40 mi (3,908.14 km) |
| Napa to Cave Spring (Virginia) | 2,291.01 mi (3,687.02 km) |
| Napa to Cayce (South Carolina) | 2,303.07 mi (3,706.44 km) |
| Napa to Cayey (Puerto Rico) | 3,629.66 mi (5,841.37 km) |
| Napa to Cedar City (Utah) | 502.85 mi (809.25 km) |
| Napa to Cedar Falls (Iowa) | 1,588.60 mi (2,556.60 km) |
| Napa to Cedar Hill (Texas) | 1,474.97 mi (2,373.73 km) |
| Napa to Cedar Lake (Indiana) | 1,849.28 mi (2,976.13 km) |
| Napa to Cedar Mill (Oregon) | 500.75 mi (805.88 km) |
