How late can your drop off a package at the USPS and it will still ship overnight?

Question

I want it to get there next day, thanks!

Answer 1

If you drop it off by 5pm it will ship overnight guarenteed to most locations, In my sources I will put a search from the USPS to check if you can send it to the address you want to overnight, certain cities can not be next day. :) Hope this helped!!