If you are using wordpress contact form 7 plugin on your website and looking for contact form 7 thank you page redirection option in admin section of contact form 7 plugin then there is no visible option present to add redirection url. You have to use additional settings option box to add redirection url.

First Create Redirect Page

First create page where you want to redirect your contact form after submission. And copy page url you will need this url in next step.

Snippet to Add Redirection For Contact form 7 thank you page

Now open contact form on which you want to add redirection url in your wordpress admin section, scroll down to Additional Settings and add following lines of code inside that option box.

on_sent_ok: "location.replace('http://yourwebsite.com/thank-you');"
Contact Fomr 7 Redirect To Thank You Page Additional Settings

Contact Fomr 7 Redirect To Thank You Page Additional Settings

Replace yourwebsite.com/thank-you with your website link.

Hide Contact Form 7 Success Message

Next step you have to do is hide the default contact form 7 success message as you don’t want that now as you have a new thank you page.
Add following line inside your current themes style.css file

.wpcf7 .wpcf7-mail-sent-ok {visibility:hidden;}