How to reload page after ajax form submit
For the purpose of the question, an easy-ish way to do a redirect after ajax is with ctools and ctools_ajax_command_redirect

// In your ajax form submit callback
ctools_include('ajax');
ctools_add_js('ajax-responder');
// Path to redirect to
$path = 'node/12';
$commands[] = ctools_ajax_command_redirect($path);
// you can also use ctools_ajax_command_reload() –  xurshid29
print ajax_render($commands);
drupal_exit();


Note, it depends on ctools, which is a popular contrib module.