Instructions
<head>
...
<link rel="stylesheet" type="text/css" href="your_website_domain/css_root/flaticon.css">
...
</head>
3Use the icon class on "display: inline" elements:
Use example: <i class="flaticon-airplane49"></i> or <span class="flaticon-airplane49"></span>
Under CC: Smashicons
<i class="flaticon-001-send-mail"></i>
<i class="flaticon-002-message"></i>
<i class="flaticon-003-mail-4"></i>
<i class="flaticon-004-mail-3"></i>