$post = array(
'post_status' => 'publish' ,
'post_title' => 'some-title',
'post_type' => 'some-post-type',
'return' => 'custom url (www.whatever.com) or home_url'
);
From the ACF documentation
return The URL to be redirected to after the post is created / updated. Defaults to the current URL with an extra GET parameter called updated=true. A special placeholder of %post_url% will be converted to post’s permalink (handy if creating a new post)!
