How long does it take for ground shipping on ups from east coast to west coast?

Really depends on the shipping speed. If you buy something and order it on USPS Priority Mail it will usually take 3 to 5 days. However, i've bought things from California and had them delivered to New York by USPS Priority Mail in about 2 or 3 days on a weekday. Just ordered something and it was shipped out yesterday afternoon (USPS Priority), USPS says I will have it by Jan 3.