Yes, it is possible to add different prices for different categories like a child, adult, infant, etc. for a single trip using the WP Travel Pro plugin.
WP Travel Pro plugin comes with multiple pricing options from which you can add different prices for a different category. To set different prices for different categories like a child, adult, infant, etc., you have to click add new button in the backend section.
You can add pricing category by going to Admin Panel > Trips > Pricing Category
For more details, please watch given below YouTube video
Further, if you have any queries, please submit them to our Contact page.