UPS, Fedex, and Amazon all use USPS for some last mile deliveries. It's usually a little less when using UPS and Fedex; not sure if Amazon bills less for it bec

UPS, Fedex, and Amazon all use USPS for some last mile deliveries. It's usually a little less when using UPS and Fedex; not sure if Amazon bills less for it because I use prime shipping so the cost is hidden.