What is JotForm?
JotForm is a free online form builder which helps you create online forms without writing a single line of code. No sign-up required.
At JotForm, we want to make sure that you’re getting the online form builder help that you need. Our friendly customer support team is available 24/7.
We believe that if one user has a question, there could be more users who may have the same question. This is why many of our support forum threads are public and available to be searched and viewed. If you’d like help immediately, feel free to search for a similar question, or submit your question or concern.
Please the answer to your request in your another thread: http://www.jotform.com/answers/249481-How-to-make-a-select-and-have-the-Form-Change-From-one-to-another?entrymessage=10732640770
The first thing that you will need to do after adding the options for One Way and Round Trip to your form is to create a Form Collapse field and set the visibility to hidden. Please see below instructions on how to do this.
Next you should set the conditions on each radio button. Below are instructions on how to do so.
Finally you should fill out the conditions similar to the image below.
I hope this Helps!!