Hello @madcorsica,
First of all thank you very much for using the WP Travel plugin.
Now regarding your issue, when we tested the Plugin we were unable to find such issue. The dates are displaying correctly.
In the plugin, you can either set the fix departure date from the backend “dates And Price” section or enter the dates in the booking form in case of enabling the trip duration option.
So please make sure you have entered the correct Arrival and Departure date either in backend or from the booking form.
If you like then you can even check the booking dates in your email by booking the trips available in the demo of the plugin as well.
link:
http://wptravel.io/core-demo/
Hope this helps.
Let us know if you have any queries further.
Thank you.
Best Regards!!
Have a good day 🙂 .