WooCommerce - Hide other shipping methods when FREE SHIPPING is available

Solution 1:

There is this recent code snippet for WooCommerce 2.6+. that you can Use:

add_filter( 'woocommerce_package_rates', 'hide_other_shipping_when_free_is_available', 100, 2 );

function hide_other_shipping_when_free_is_available( $rates, $package ) {

    $free = array();
    foreach ( $rates as $rate_id => $rate ) {
        if ( 'free_shipping' === $rate->method_id ) {
            $free[ $rate_id ] = $rate;
            break;
        }
    }
    return ! empty( $free ) ? $free : $rates;
}

You will need to refresh shipping cached data: disable, save and enable, save related shipping methods for the current shipping zone, in woocommerce shipping settings.

For WooCommerce 2.5, You should try this:

add_filter( 'woocommerce_package_rates', 'hide_shipping_when_free_is_available', 10, 2 );

function hide_shipping_when_free_is_available( $rates, $package ) {
    
    // Only modify rates if free_shipping is present
    if ( isset( $rates['free_shipping'] ) ) {
    
        // To unset a single rate/method, do the following. This example unsets flat_rate shipping
        unset( $rates['flat_rate'] );
        
        // To unset all methods except for free_shipping, do the following
        $free_shipping          = $rates['free_shipping'];
        $rates                  = array();
        $rates['free_shipping'] = $free_shipping;
    }
    
    return $rates;
}

Paste this code in the function.php file located in your active child theme or theme.

Reference: Hide other shipping methods when FREE SHIPPING is available (official doc)

Related:

• How to hide free shipping when there is shipping costs in WooCommerce
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