Your tracking information will tell you . I'm a prime member and order a lot from Amazon, sometimes, ups, sometimes post office, once in great while fed ex...tracking always lets me know what to expect and when.

I'm a member of the Prime and all of mine so far has come by USPS.I did an order recently on a Friday and @ 2:00 p m on Sunday , a mail man delivered my package. Now I don't order on Fridays -I don't want anyone having to work on Sundays delivering packages.It wasn't crucial that I got it that soon.

I was out walking yesterday and the USPS truck made several deliveries to my neighbors. I was surprised as it was Easter Sunday. I assume they were Amazon orders. Now, I have to watch as I never think to look in my mailbox on a Sunday.

I live in south Texas and Amazon always comes UPS...I have 5 items coming today...lol

It really depends if the order is being shipped by Amazon or an affiliate company. Did you look at the order? It should be listed. If not, call them and ask.

You can check by going to the tracking number they provide on your computer receipt. That's how I keep track where the package is from day to day. I set it up to get daily tracking info or whenever they change a location. Sometimes it comes by way of UPS and others times it gets transferred over to my local USPS as someone else mentioned.