WP Travel plugin provides the feature regarding adding a fixed departure date for the trip and displaying it on a single trip page.
To show a fixed departure date on a single trip page as shown in the above-given screenshot, you have to add the departure date in the backend section by going to Admin Panel > Trips > Individual Trip(edited) > Prices & Dates > Dates > Enable Fixed Departure
The starting date which will be added under the fixed departure date section will be displayed on the single trip page as shown in the above-given screenshot.
For more detail regarding Fixed Departure date please refer to the documentation.
Further, if you have any queries, please submit them to our Contact page.