How long does mail take to get from one state to another?

I think it is one day per state. Example: If a package was in...Boise, Idaho, and it was going to...San Diego, California, I think it would take approximately 2 days to get there.

Here is a map of the U.S. and depending on where you live and where the package goes, just count on 1 day of mail traveling from state to state.

http://www.digitalfieldguide.com/images/map-usa.jpg

(copy and paste hyperlink)