Packages sent from Pennsylvania to Arizona via U.S. Postal Service Priority Mail may reach their destination in as little as two or three business days. Those shipped through USPS Standard Post service can take up to eight business days to arrive.
The amount of time in transit ultimately depends on the size of the package, where it originates from in Pennsylvania and its destination zip code in Arizona. While Priority Mail packages sent to the Phoenix and Tucson metropolitan areas often reach their target in two business days, residents in the rural, northeastern region of the Grand Canyon State can generally expect it in three business days. The standard post service takes anywhere from two to eight business days.