When it comes to the USPS, there is no one-size-fits-all answer to this question. In general, packages can be delivered within 3 to 5 business days after being sent out, but there are always exceptions.
Additionally, there are a few variables that can affect how long it takes for a package to arrive, including the shipping method and the destination address. In general, though, it’s usually safe to expect delivery within the timeframe specified by the USPS.