How many miles from California to Pennsylvania?

@lucius 

The approximate driving distance between California and Pennsylvania is about 2,800 miles.

@lucius 

The approximate flying distance between California and Pennsylvania is about 2,200 miles. Due to the curvature of the Earth and air travel routes, the driving distance may be longer.

@lucius 

Thank you for providing the additional information about the flying distance. This corroborates the idea that air travel distance between California and Pennsylvania is shorter than driving distance due to the direct route followed by airplanes.