This is a simple freight calculator in php, that uses Google's Distance Matrix API. It has a configuration page, for pricing per kilometer, and location origin.
Custom made for a project.
brucecantarim/woocommerce-freight-calculator
A freight calculator plugin for Woocommerce, it uses Google Maps Distance Matrix API for the distance calculation, and has several options to give you a tight control over your area of coverage and rates.
PHP