| Napa to Blue Island (Illinois) | 1,835.17 mi (2,953.41 km) |
| Napa to Blue Springs (Missouri) | 1,507.16 mi (2,425.54 km) |
| Napa to Bluffdale (Utah) | 573.08 mi (922.28 km) |
| Napa to Bluffton (Indiana) | 1,971.32 mi (3,172.54 km) |
| Napa to Bluffton (South Carolina) | 2,351.73 mi (3,784.74 km) |
| Napa to Blythe (California) | 537.18 mi (864.50 km) |
| Napa to Blytheville (Arkansas) | 1,783.25 mi (2,869.86 km) |
| Napa to Boca Raton (Florida) | 2,572.14 mi (4,139.47 km) |
| Napa to Boerne (Texas) | 1,466.69 mi (2,360.41 km) |
| Napa to Bogalusa (Louisiana) | 1,906.93 mi (3,068.91 km) |
| Napa to Boiling Springs (South Carolina) | 2,228.23 mi (3,585.99 km) |
| Napa to Boise (Idaho) | 484.07 mi (779.04 km) |
| Napa to Bolingbrook (Illinois) | 1,813.33 mi (2,918.28 km) |
| Napa to Bolivar (Missouri) | 1,567.94 mi (2,523.36 km) |
| Napa to Bon Air (Virginia) | 2,414.74 mi (3,886.16 km) |
