The Departure date is has the following format: 'DD-MM-YYYY hh:mm:ss', but that should not be a problem right?
Well, I think it is. Your departure is still a timestamp, not a date type, even if you formatted is with only the date part. So you have the data in your table, but QV will not successfully link your timestamp to the calendar date.
I think you should use
Date(daystart(Departure)) as Date,
in your excel load.