WP Travel Pro plugin provides the feature regarding making the cart page either available or unavailable during the booking of the trip as per your requirement.
If you want to skip the cart page and move directly to the checkout page from the single trip page during the booking of the trip, you have to enable the Skip cart page option by going to Admin Panel > WP Travel > Settings > Cart & Checkout
Note: This feature has been removed form WP Travel version 4.0.0 and above.
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