how many days is flat rate shipping

how many days is flat rate shipping depends on the carrier and shipping service chosen. For example, USPS Priority Mail Flat Rate usually delivers within 1 to 3 business days within the United States. This shipping option is ideal for sending packages that weigh up to 70 pounds without worrying about the distance to the destination. Flat rate shipping is available for both domestic and international deliveries, with delivery times varying depending on the destination.