Pirate Ship offers USPS shipping discounts up to 87%, making it a great choice...

https://sticky-wiki.win/index.php/Shippo_for_WooCommerce:_Does_It_Handle_Multi-Carrier_Rate_Shopping%3F

Pirate Ship offers USPS shipping discounts up to 87%, making it a great choice if you mainly ship via USPS and want easy-to-use, straightforward pricing. Support is only through email, and sadly, no DHL Express options are available