You can display itineraries in list form instead of grid form using shortcode. If you are willing to display the trips using shordcode in page/post in listed form instead of grid form then you have to add following given shortcode in page/post as per your requirement.

[wp_travel_itineraries view_mode="list"]

For detail, you can refer our demo link.

If you have any queries, please submit it to our Contact page.