Snippet to sort the WooCommerce Shipping Rates in ascending order. PluginHive Plugins : https://www.pluginhive.com/plugins/

functions.php

/**
 * Snippet to sort the WooCommerce Shipping Rates in ascending order.
 * Created at : 04 Oct 2018
 * Updated at : 04 Oct 2018
 * PluginHive Plugins : https://www.pluginhive.com/plugins/
 * Gist Link : https://gist.github.com/varun-pluginhive/683bb169341200d59c4d3058d5ca06eb
 */
add_filter( 'woocommerce_package_rates', function( $rates ){
	if( empty($rates) ) return $rates;

	foreach( $rates as $rate ) {
		$rate_cost[] = $rate->get_cost();
	}
	
	array_multisort( $rate_cost, $rates );
	
	return $rates;
});