Hide a Shipping Option When Another Option is Available (Title Based)

wc-hide-shipping-option-title-based.php

/**
 * Hide a shipping option when the given shipping option is in the cart based on their titles
 * Code snippets should be added to the functions.php file of your child theme
 *
 * @return array
 */
function hide_shipping_when_option_is_available( $rates ) {
    // shipping option titles to be removed and the requirement, respectively
    $option_removed = 'Super Saver Shipping';
    $option_needed = 'Free Super Saver Shipping';
    $if_exists = false;
 
    foreach( $rates as $key => $option ) {
        if( $option->get_label() == $option_needed )
            $if_exists = true;
    }
 
    if( $if_exists ) {
        foreach( $rates as $key => $option ) {
            if( $option->get_label() == $option_removed )
                unset( $rates[ $key ] );
        }
    }
 
    return $rates;
}
add_filter( 'woocommerce_package_rates', 'hide_shipping_when_option_is_available', 10, 1 );