Usps Rates 2024 Chart. Explore the usps postage rate shifts for postcards, flats, and letter sizes in 2024, and optimize your mailing strategies accordingly to. See what the changes will include and download our rate change.
Usps postal rates & promotions for 2024: The new rates apply to retail and commercial prices for priority mail ®, and usps ground advantage™ and priority mail express packages from october 6, 2024, through january 18, 2025.