Dual Datepicker

HTML

<link rel="stylesheet" href="http://ajax.googleapis.com/ajax/libs/jqueryui/1.8.11/themes/humanity/jquery-ui.css">
Depart: <input type="text" id="dep_date" /> Return: <input type="text" id="ret_date" />

CSS

html, .ui-widget { font-size: 0.9em; }

JavaScript

$("#dep_date").datepicker({
    dateFormat: 'dd/mm/yy',
    onSelect: function(dateText, inst) {
        var date = $.datepicker.parseDate('dd/mm/yy', dateText);
        var $ret_date = $("#ret_date");
        $ret_date.datepicker("option", "defaultDate", date);
    }
});

$("#ret_date").datepicker({
    dateFormat: 'dd/mm/yy',
});