Yes, you can! In the Form Editor, click the Thank You page icon. Afterward, select the second radio button: Redirect to a web page. Paste the URL in the box below and your submitters will be redirected there.
By default, the selected button is Show text; this is for showing a confirmation/thank you message after submission. If you want to both show a message and redirect to a web page, select the third radio button: Show text, then redirect to a web page. Type in the confirmation message and paste the URL of your web page in the box below.
For the redirect to work properly, use a secured URL (starting with https).
You can select from the dropdown list the way the webpage will open. The options are: in the default frame, in the same frame, in the parent frame, or in new frame (if browser allows it). Use the option that suits your needs best.