Update - Nov. 2018 - Added compatibility with Woocommerce version 3.3+
This is possible hooking a custom function in manage_shop_order_posts_custom_column
action hook. Below I am adding the billing phone to the existing Order ("Pedido") column data:
add_action( 'manage_shop_order_posts_custom_column' , 'custom_orders_list_column_content', 10, 2 );
function custom_orders_list_column_content( $column, $post_id ) {
if ( $column == 'order_title' || $column == 'order_number' )
{
// The billing phone for example (to be repaced by your custom field meta_key)
$custom_field_value = get_post_meta( $post_id, '_billing_phone', true );
if( ! empty( $custom_field_value ) )
echo $custom_field_value;
}
}
*Code goes in function.php file of your active child theme (or active theme) . Tested and works