Joni Halabi

Important notice!
Due to a shift in my personal and professional priorities, I have decided to take a step back from development. As a result, this plugin is no longer being actively maintained. You are welcome to <a href="https://github.com/thatdevgirl/woocommerce-tiered-flat-rate" rel="nofollow ugc">fork it</a> and create your own updates. If you do so, please credit me as the original author. (I would also love to hear about this plugin’s new life!)
All the best, Joni.
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WordPress administrative users can create a tiered flat rate shipping fee based on the total number of items in a WooCommerce cart. The store administrator can choose to apply this shipping method to all allowed countries that the store may ship to or only specific countries.
There are two tiers in this shipping method:
<ul>
<li>
Base shipping fee: This is the base (default) flat shipping fee that is applied automatically to the cart total for any number of items.
</li>
<li>
Additional shipping fee for tiers: This is the additional shipping fee that is added to the base fee if the number of items in the user’s cart exceeds a specified number. This tiered fee can either be a flat fee, meaning that it is applied to carts of any size above the specified tier quantity, or a progressive fee, meaning that the tier quantity is used as a multiplier to the tiered fee.
</li>
</ul>

WC Tiered Shipping

Kudos to the developer.  This plugin was very useful.



Very helpful plugin

[Deprecated!] This WordPress plugin adds a tiered flat rate shipping option for the WooCommerce plugin.

bilaliqbalr

This woocommerce based plugin helps you make flat shipping free for users having specific quantity of orders in their cart. 
Let say, you want to offer your clients free shipping on orders having 3 or more items in their cart, than using this plugin you will be able to set value 3 in Woocommerce Shipping settings page and you are all set to go.

Woocommerce Free Shipping

This woocommerce based plugin helps you make flat shipping free for users having specific quantity of orders in their cart.

WC Tiered Shipping vs Woocommerce Free Shipping