How long does it take a letter to be mailed from one zip code to the next?

Is there any website or way to find out how long a letter takes to be mailed standard usps from one zip code to the next? I know there are variables and all......The letter would be from 95242 to 95831. Thanks!|||The average transit time between any two given points in the continental US is 2-3 days.|||try www.usps.com site and it should tell you but I would say about 3 days|||You helped because you gave both zip codes--since they are both 95 area codes, and you are not mailing over a holiday, the longest it should take is 2 days....you can call your local post office and they can advise you....but good luck getting through to them, they are busy sending packages to all the troops.|||What kind of question is this? lol|||Usually 3 days but since they are so close I would say it would probably get there in two days.|||Shouldn't take too long, within state mail is usually pretty quick... usually taking no more than a week to get there... state to state mail varies by how much it weighs and what it is you sent... also the postal service *like UPS and FedEx* you selected affects it...