Redirected old landing page to a new one, still SERP's are showing the old one!

[lata21]

I don't know how it will help. The old page is not in the SERP's its just that the headline is.

Because sometimes it does help that way. Once you no-index the old page. The crawlers will send a message to the search engines that the old content is no longer available. And your new page which is already indexed & ranking, will get the benefit. Because sooner the search engines realizes the mistake they will correct it asap.