That would depend on where it is posted from, the Class of Postage used however within the contiguous United States delivery is made in three to five days, Sundays excluded.
First Class mail take approximately three days to get from DC to NJ.
I
1 sec
a week
one day
It will take two to six days.
1 to 14 days or more
7-10 business days
It can take roughly 8-10 hours to fly.
2 to 4 days
The amount of time it will take mail to reach Tennessee from New Jersey will depend on how it was sent. A First Class piece will take 3 to 5 days.
It takes about 25 working days for the Hong Kong post to reach Parcelforce in the UK.
Shipping a package by Priority mail through the United States Postal Service from New Jersey to Washington generally takes 2-3 days. Priority envelopes and boxes are available free of charge at the post office.