Lemme do some explainings
Priority Mail varies a lot. USPS piggybacks on Fedex mainly (UPS I believe too) for Express, and Priority Mail.
First Class, Priority Mail (sometimes), and Parcels that weigh 1lb or less go on Commercial Airlines
Priority Mail in Major destinations have a better chance of getting there. I've had a Boston > Seattle package get there in two days.
It really depends on flights and how the package is being routed.
Priority Mail varies a lot. USPS piggybacks on Fedex mainly (UPS I believe too) for Express, and Priority Mail.
First Class, Priority Mail (sometimes), and Parcels that weigh 1lb or less go on Commercial Airlines
Priority Mail in Major destinations have a better chance of getting there. I've had a Boston > Seattle package get there in two days.
It really depends on flights and how the package is being routed.
