priority mail or express mail

priority mail or express mail refers to two different services provided by USPS for fast delivery. Priority Mail offers a quicker delivery option (1 to 3 business days) compared to standard mail and includes tracking and delivery updates. Express Mail, also known as Priority Mail Express, is the fastest option, offering guaranteed overnight delivery, including on weekends, with tracking and insurance included. Priority Mail is less expensive than Express Mail, but it is not guaranteed for overnight delivery.