Conditionally hide shipping methods in WooCommerce

Question

I am trying to hide a shipping method on the checkout page of WooCommerce when shipping country selected is United States - 'US' and cart_total is more than 100. But the script is still hiding both the Normal Shipping and Express shipping, when it should only hide the normal shipping(flat_rate:4). Any help will be greatly appreciated!

function nd_hide_shipping_when_free_is_available( $rates ) {
    $shipping_counrtry = WC()->customer->get_shipping_country();
    $total = WC()->cart->get_displayed_subtotal();
    if ($shipping_country == "US" && $total >= 100){
        unset($rates['flat_rate:4']);
        return $rates;
    }else{
        $free = array();
        foreach ( $rates as $rate_id => $rate ) {
            if ( 'free_shipping' === $rate->method_id ) {
                $free[ $rate_id ] = $rate;
                break;
            }
        }
        return ! empty( $free ) ? $free : $rates;
    }
}
add_filter( 'woocommerce_package_rates', 'nd_hide_shipping_when_free_is_available', 100 );

Answer 1

You can try the following, that will hide 'flat_rate:4' shipping method rate id for US and when cart subtotal reaches 100 or more, otherwise when free shipping is available, it will hide other shipping methods:

add_filter( 'woocommerce_package_rates', 'shipping_based_on_country_subtotal_and_free_available', 100, 2 );
function shipping_based_on_country_subtotal_and_free_available( $rates, $package ) {
    $country   = WC()->customer->get_shipping_country();
    $subtotal  = WC()->cart->subtotal; // subtotal incl taxes
    $condition = $country == "US" && $subtotal >= 100; // <== HERE Set your condition (country and minimal subtotal amount)
    $free      = array(); // Initializing

    // Loop through shipping rates for current shipping package
    foreach ( $rates as $rate_key => $rate ) {
        if ( $condition ){
            $targeted_rate_id = 'flat_rate:4';
            
            if( $targeted_rate_id === $rate_key ) {
                unset($rates[$targeted_rate_id]);
            }
        }
        elseif ( 'free_shipping' === $rate->method_id ) {
            $free[$rate_key] = $rate;
        }
    }
    return ! empty( $free ) && ! $condition ? $free : $rates;
}

Code goes in functions.php file of the active child theme (or active theme). Tested and works.

Important: Once code is saved, empty the cart to refresh shipping rates...